forked from Minki/linux
7c06b5d672
Cc: Steven Whitehouse <swhiteho@redhat.com> Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
1614 lines
38 KiB
C
1614 lines
38 KiB
C
/*
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* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
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* Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
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*
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* This copyrighted material is made available to anyone wishing to use,
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* modify, copy, or redistribute it subject to the terms and conditions
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* of the GNU General Public License version 2.
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*/
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/*
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* Quota change tags are associated with each transaction that allocates or
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* deallocates space. Those changes are accumulated locally to each node (in a
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* per-node file) and then are periodically synced to the quota file. This
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* avoids the bottleneck of constantly touching the quota file, but introduces
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* fuzziness in the current usage value of IDs that are being used on different
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* nodes in the cluster simultaneously. So, it is possible for a user on
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* multiple nodes to overrun their quota, but that overrun is controlable.
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* Since quota tags are part of transactions, there is no need for a quota check
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* program to be run on node crashes or anything like that.
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*
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* There are couple of knobs that let the administrator manage the quota
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* fuzziness. "quota_quantum" sets the maximum time a quota change can be
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* sitting on one node before being synced to the quota file. (The default is
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* 60 seconds.) Another knob, "quota_scale" controls how quickly the frequency
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* of quota file syncs increases as the user moves closer to their limit. The
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* more frequent the syncs, the more accurate the quota enforcement, but that
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* means that there is more contention between the nodes for the quota file.
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* The default value is one. This sets the maximum theoretical quota overrun
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* (with infinite node with infinite bandwidth) to twice the user's limit. (In
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* practice, the maximum overrun you see should be much less.) A "quota_scale"
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* number greater than one makes quota syncs more frequent and reduces the
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* maximum overrun. Numbers less than one (but greater than zero) make quota
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* syncs less frequent.
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*
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* GFS quotas also use per-ID Lock Value Blocks (LVBs) to cache the contents of
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* the quota file, so it is not being constantly read.
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*/
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#include <linux/sched.h>
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#include <linux/slab.h>
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#include <linux/mm.h>
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#include <linux/spinlock.h>
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#include <linux/completion.h>
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#include <linux/buffer_head.h>
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#include <linux/sort.h>
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#include <linux/fs.h>
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#include <linux/bio.h>
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#include <linux/gfs2_ondisk.h>
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#include <linux/kthread.h>
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#include <linux/freezer.h>
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#include <linux/quota.h>
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#include <linux/dqblk_xfs.h>
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#include "gfs2.h"
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#include "incore.h"
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#include "bmap.h"
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#include "glock.h"
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#include "glops.h"
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#include "log.h"
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#include "meta_io.h"
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#include "quota.h"
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#include "rgrp.h"
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#include "super.h"
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#include "trans.h"
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#include "inode.h"
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#include "util.h"
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struct gfs2_quota_change_host {
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u64 qc_change;
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u32 qc_flags; /* GFS2_QCF_... */
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struct kqid qc_id;
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};
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static LIST_HEAD(qd_lru_list);
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static atomic_t qd_lru_count = ATOMIC_INIT(0);
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static DEFINE_SPINLOCK(qd_lru_lock);
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int gfs2_shrink_qd_memory(struct shrinker *shrink, struct shrink_control *sc)
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{
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struct gfs2_quota_data *qd;
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struct gfs2_sbd *sdp;
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int nr_to_scan = sc->nr_to_scan;
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if (nr_to_scan == 0)
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goto out;
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if (!(sc->gfp_mask & __GFP_FS))
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return -1;
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spin_lock(&qd_lru_lock);
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while (nr_to_scan && !list_empty(&qd_lru_list)) {
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qd = list_entry(qd_lru_list.next,
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struct gfs2_quota_data, qd_reclaim);
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sdp = qd->qd_gl->gl_sbd;
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/* Free from the filesystem-specific list */
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list_del(&qd->qd_list);
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gfs2_assert_warn(sdp, !qd->qd_change);
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gfs2_assert_warn(sdp, !qd->qd_slot_count);
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gfs2_assert_warn(sdp, !qd->qd_bh_count);
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gfs2_glock_put(qd->qd_gl);
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atomic_dec(&sdp->sd_quota_count);
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/* Delete it from the common reclaim list */
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list_del_init(&qd->qd_reclaim);
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atomic_dec(&qd_lru_count);
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spin_unlock(&qd_lru_lock);
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kmem_cache_free(gfs2_quotad_cachep, qd);
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spin_lock(&qd_lru_lock);
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nr_to_scan--;
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}
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spin_unlock(&qd_lru_lock);
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out:
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return (atomic_read(&qd_lru_count) * sysctl_vfs_cache_pressure) / 100;
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}
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static u64 qd2index(struct gfs2_quota_data *qd)
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{
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struct kqid qid = qd->qd_id;
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return (2 * (u64)from_kqid(&init_user_ns, qid)) +
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(qid.type == USRQUOTA) ? 0 : 1;
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}
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static u64 qd2offset(struct gfs2_quota_data *qd)
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{
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u64 offset;
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offset = qd2index(qd);
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offset *= sizeof(struct gfs2_quota);
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return offset;
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}
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static int qd_alloc(struct gfs2_sbd *sdp, struct kqid qid,
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struct gfs2_quota_data **qdp)
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{
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struct gfs2_quota_data *qd;
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int error;
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qd = kmem_cache_zalloc(gfs2_quotad_cachep, GFP_NOFS);
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if (!qd)
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return -ENOMEM;
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atomic_set(&qd->qd_count, 1);
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qd->qd_id = qid;
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qd->qd_slot = -1;
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INIT_LIST_HEAD(&qd->qd_reclaim);
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error = gfs2_glock_get(sdp, qd2index(qd),
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&gfs2_quota_glops, CREATE, &qd->qd_gl);
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if (error)
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goto fail;
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*qdp = qd;
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return 0;
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fail:
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kmem_cache_free(gfs2_quotad_cachep, qd);
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return error;
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}
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static int qd_get(struct gfs2_sbd *sdp, struct kqid qid,
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struct gfs2_quota_data **qdp)
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{
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struct gfs2_quota_data *qd = NULL, *new_qd = NULL;
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int error, found;
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*qdp = NULL;
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for (;;) {
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found = 0;
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spin_lock(&qd_lru_lock);
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list_for_each_entry(qd, &sdp->sd_quota_list, qd_list) {
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if (qid_eq(qd->qd_id, qid)) {
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if (!atomic_read(&qd->qd_count) &&
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!list_empty(&qd->qd_reclaim)) {
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/* Remove it from reclaim list */
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list_del_init(&qd->qd_reclaim);
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atomic_dec(&qd_lru_count);
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}
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atomic_inc(&qd->qd_count);
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found = 1;
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break;
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}
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}
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if (!found)
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qd = NULL;
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if (!qd && new_qd) {
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qd = new_qd;
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list_add(&qd->qd_list, &sdp->sd_quota_list);
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atomic_inc(&sdp->sd_quota_count);
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new_qd = NULL;
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}
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spin_unlock(&qd_lru_lock);
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if (qd) {
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if (new_qd) {
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gfs2_glock_put(new_qd->qd_gl);
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kmem_cache_free(gfs2_quotad_cachep, new_qd);
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}
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*qdp = qd;
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return 0;
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}
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error = qd_alloc(sdp, qid, &new_qd);
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if (error)
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return error;
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}
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}
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static void qd_hold(struct gfs2_quota_data *qd)
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{
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struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
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gfs2_assert(sdp, atomic_read(&qd->qd_count));
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atomic_inc(&qd->qd_count);
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}
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static void qd_put(struct gfs2_quota_data *qd)
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{
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if (atomic_dec_and_lock(&qd->qd_count, &qd_lru_lock)) {
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/* Add to the reclaim list */
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list_add_tail(&qd->qd_reclaim, &qd_lru_list);
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atomic_inc(&qd_lru_count);
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spin_unlock(&qd_lru_lock);
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}
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}
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static int slot_get(struct gfs2_quota_data *qd)
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{
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struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
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unsigned int c, o = 0, b;
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unsigned char byte = 0;
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spin_lock(&qd_lru_lock);
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if (qd->qd_slot_count++) {
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spin_unlock(&qd_lru_lock);
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return 0;
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}
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for (c = 0; c < sdp->sd_quota_chunks; c++)
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for (o = 0; o < PAGE_SIZE; o++) {
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byte = sdp->sd_quota_bitmap[c][o];
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if (byte != 0xFF)
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goto found;
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}
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goto fail;
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found:
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for (b = 0; b < 8; b++)
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if (!(byte & (1 << b)))
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break;
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qd->qd_slot = c * (8 * PAGE_SIZE) + o * 8 + b;
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if (qd->qd_slot >= sdp->sd_quota_slots)
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goto fail;
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sdp->sd_quota_bitmap[c][o] |= 1 << b;
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spin_unlock(&qd_lru_lock);
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return 0;
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fail:
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qd->qd_slot_count--;
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spin_unlock(&qd_lru_lock);
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return -ENOSPC;
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}
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static void slot_hold(struct gfs2_quota_data *qd)
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{
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struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
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spin_lock(&qd_lru_lock);
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gfs2_assert(sdp, qd->qd_slot_count);
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qd->qd_slot_count++;
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spin_unlock(&qd_lru_lock);
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}
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static void slot_put(struct gfs2_quota_data *qd)
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{
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struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
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spin_lock(&qd_lru_lock);
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gfs2_assert(sdp, qd->qd_slot_count);
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if (!--qd->qd_slot_count) {
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gfs2_icbit_munge(sdp, sdp->sd_quota_bitmap, qd->qd_slot, 0);
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qd->qd_slot = -1;
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}
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spin_unlock(&qd_lru_lock);
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}
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static int bh_get(struct gfs2_quota_data *qd)
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{
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struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
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struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode);
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unsigned int block, offset;
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struct buffer_head *bh;
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int error;
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struct buffer_head bh_map = { .b_state = 0, .b_blocknr = 0 };
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mutex_lock(&sdp->sd_quota_mutex);
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if (qd->qd_bh_count++) {
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mutex_unlock(&sdp->sd_quota_mutex);
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return 0;
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}
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block = qd->qd_slot / sdp->sd_qc_per_block;
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offset = qd->qd_slot % sdp->sd_qc_per_block;
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bh_map.b_size = 1 << ip->i_inode.i_blkbits;
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error = gfs2_block_map(&ip->i_inode, block, &bh_map, 0);
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if (error)
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goto fail;
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error = gfs2_meta_read(ip->i_gl, bh_map.b_blocknr, DIO_WAIT, &bh);
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if (error)
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goto fail;
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error = -EIO;
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if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC))
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goto fail_brelse;
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qd->qd_bh = bh;
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qd->qd_bh_qc = (struct gfs2_quota_change *)
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(bh->b_data + sizeof(struct gfs2_meta_header) +
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offset * sizeof(struct gfs2_quota_change));
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mutex_unlock(&sdp->sd_quota_mutex);
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return 0;
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fail_brelse:
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brelse(bh);
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fail:
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qd->qd_bh_count--;
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mutex_unlock(&sdp->sd_quota_mutex);
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return error;
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}
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static void bh_put(struct gfs2_quota_data *qd)
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{
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struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
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mutex_lock(&sdp->sd_quota_mutex);
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gfs2_assert(sdp, qd->qd_bh_count);
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if (!--qd->qd_bh_count) {
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brelse(qd->qd_bh);
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qd->qd_bh = NULL;
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qd->qd_bh_qc = NULL;
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}
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mutex_unlock(&sdp->sd_quota_mutex);
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}
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static int qd_fish(struct gfs2_sbd *sdp, struct gfs2_quota_data **qdp)
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{
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struct gfs2_quota_data *qd = NULL;
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int error;
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int found = 0;
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*qdp = NULL;
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if (sdp->sd_vfs->s_flags & MS_RDONLY)
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return 0;
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spin_lock(&qd_lru_lock);
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list_for_each_entry(qd, &sdp->sd_quota_list, qd_list) {
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if (test_bit(QDF_LOCKED, &qd->qd_flags) ||
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!test_bit(QDF_CHANGE, &qd->qd_flags) ||
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qd->qd_sync_gen >= sdp->sd_quota_sync_gen)
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continue;
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list_move_tail(&qd->qd_list, &sdp->sd_quota_list);
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set_bit(QDF_LOCKED, &qd->qd_flags);
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gfs2_assert_warn(sdp, atomic_read(&qd->qd_count));
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atomic_inc(&qd->qd_count);
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qd->qd_change_sync = qd->qd_change;
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gfs2_assert_warn(sdp, qd->qd_slot_count);
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qd->qd_slot_count++;
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found = 1;
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break;
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}
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if (!found)
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qd = NULL;
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|
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spin_unlock(&qd_lru_lock);
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|
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if (qd) {
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gfs2_assert_warn(sdp, qd->qd_change_sync);
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error = bh_get(qd);
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if (error) {
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clear_bit(QDF_LOCKED, &qd->qd_flags);
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slot_put(qd);
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qd_put(qd);
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return error;
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}
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}
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*qdp = qd;
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return 0;
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}
|
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|
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static int qd_trylock(struct gfs2_quota_data *qd)
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{
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struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
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|
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if (sdp->sd_vfs->s_flags & MS_RDONLY)
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return 0;
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|
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spin_lock(&qd_lru_lock);
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|
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if (test_bit(QDF_LOCKED, &qd->qd_flags) ||
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!test_bit(QDF_CHANGE, &qd->qd_flags)) {
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spin_unlock(&qd_lru_lock);
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return 0;
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}
|
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|
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list_move_tail(&qd->qd_list, &sdp->sd_quota_list);
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|
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set_bit(QDF_LOCKED, &qd->qd_flags);
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gfs2_assert_warn(sdp, atomic_read(&qd->qd_count));
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atomic_inc(&qd->qd_count);
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qd->qd_change_sync = qd->qd_change;
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gfs2_assert_warn(sdp, qd->qd_slot_count);
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qd->qd_slot_count++;
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|
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spin_unlock(&qd_lru_lock);
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|
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gfs2_assert_warn(sdp, qd->qd_change_sync);
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if (bh_get(qd)) {
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clear_bit(QDF_LOCKED, &qd->qd_flags);
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slot_put(qd);
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qd_put(qd);
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return 0;
|
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}
|
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|
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return 1;
|
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}
|
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|
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static void qd_unlock(struct gfs2_quota_data *qd)
|
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{
|
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gfs2_assert_warn(qd->qd_gl->gl_sbd,
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test_bit(QDF_LOCKED, &qd->qd_flags));
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clear_bit(QDF_LOCKED, &qd->qd_flags);
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bh_put(qd);
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slot_put(qd);
|
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qd_put(qd);
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}
|
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|
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static int qdsb_get(struct gfs2_sbd *sdp, struct kqid qid,
|
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struct gfs2_quota_data **qdp)
|
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{
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int error;
|
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|
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error = qd_get(sdp, qid, qdp);
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if (error)
|
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return error;
|
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|
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error = slot_get(*qdp);
|
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if (error)
|
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goto fail;
|
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|
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error = bh_get(*qdp);
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if (error)
|
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goto fail_slot;
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|
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return 0;
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|
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fail_slot:
|
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slot_put(*qdp);
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fail:
|
|
qd_put(*qdp);
|
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return error;
|
|
}
|
|
|
|
static void qdsb_put(struct gfs2_quota_data *qd)
|
|
{
|
|
bh_put(qd);
|
|
slot_put(qd);
|
|
qd_put(qd);
|
|
}
|
|
|
|
int gfs2_quota_hold(struct gfs2_inode *ip, kuid_t uid, kgid_t gid)
|
|
{
|
|
struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
|
|
struct gfs2_quota_data **qd;
|
|
int error;
|
|
|
|
if (ip->i_res == NULL) {
|
|
error = gfs2_rs_alloc(ip);
|
|
if (error)
|
|
return error;
|
|
}
|
|
|
|
qd = ip->i_res->rs_qa_qd;
|
|
|
|
if (gfs2_assert_warn(sdp, !ip->i_res->rs_qa_qd_num) ||
|
|
gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags)))
|
|
return -EIO;
|
|
|
|
if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
|
|
return 0;
|
|
|
|
error = qdsb_get(sdp, make_kqid_uid(ip->i_inode.i_uid), qd);
|
|
if (error)
|
|
goto out;
|
|
ip->i_res->rs_qa_qd_num++;
|
|
qd++;
|
|
|
|
error = qdsb_get(sdp, make_kqid_gid(ip->i_inode.i_gid), qd);
|
|
if (error)
|
|
goto out;
|
|
ip->i_res->rs_qa_qd_num++;
|
|
qd++;
|
|
|
|
if (uid != NO_UID_QUOTA_CHANGE && uid != ip->i_inode.i_uid) {
|
|
error = qdsb_get(sdp, make_kqid_uid(uid), qd);
|
|
if (error)
|
|
goto out;
|
|
ip->i_res->rs_qa_qd_num++;
|
|
qd++;
|
|
}
|
|
|
|
if (gid != NO_GID_QUOTA_CHANGE && gid != ip->i_inode.i_gid) {
|
|
error = qdsb_get(sdp, make_kqid_gid(gid), qd);
|
|
if (error)
|
|
goto out;
|
|
ip->i_res->rs_qa_qd_num++;
|
|
qd++;
|
|
}
|
|
|
|
out:
|
|
if (error)
|
|
gfs2_quota_unhold(ip);
|
|
return error;
|
|
}
|
|
|
|
void gfs2_quota_unhold(struct gfs2_inode *ip)
|
|
{
|
|
struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
|
|
unsigned int x;
|
|
|
|
if (ip->i_res == NULL)
|
|
return;
|
|
gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags));
|
|
|
|
for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) {
|
|
qdsb_put(ip->i_res->rs_qa_qd[x]);
|
|
ip->i_res->rs_qa_qd[x] = NULL;
|
|
}
|
|
ip->i_res->rs_qa_qd_num = 0;
|
|
}
|
|
|
|
static int sort_qd(const void *a, const void *b)
|
|
{
|
|
const struct gfs2_quota_data *qd_a = *(const struct gfs2_quota_data **)a;
|
|
const struct gfs2_quota_data *qd_b = *(const struct gfs2_quota_data **)b;
|
|
|
|
if (qid_lt(qd_a->qd_id, qd_b->qd_id))
|
|
return -1;
|
|
if (qid_lt(qd_b->qd_id, qd_a->qd_id))
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
static void do_qc(struct gfs2_quota_data *qd, s64 change)
|
|
{
|
|
struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
|
|
struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode);
|
|
struct gfs2_quota_change *qc = qd->qd_bh_qc;
|
|
s64 x;
|
|
|
|
mutex_lock(&sdp->sd_quota_mutex);
|
|
gfs2_trans_add_bh(ip->i_gl, qd->qd_bh, 1);
|
|
|
|
if (!test_bit(QDF_CHANGE, &qd->qd_flags)) {
|
|
qc->qc_change = 0;
|
|
qc->qc_flags = 0;
|
|
if (qd->qd_id.type == USRQUOTA)
|
|
qc->qc_flags = cpu_to_be32(GFS2_QCF_USER);
|
|
qc->qc_id = cpu_to_be32(from_kqid(&init_user_ns, qd->qd_id));
|
|
}
|
|
|
|
x = be64_to_cpu(qc->qc_change) + change;
|
|
qc->qc_change = cpu_to_be64(x);
|
|
|
|
spin_lock(&qd_lru_lock);
|
|
qd->qd_change = x;
|
|
spin_unlock(&qd_lru_lock);
|
|
|
|
if (!x) {
|
|
gfs2_assert_warn(sdp, test_bit(QDF_CHANGE, &qd->qd_flags));
|
|
clear_bit(QDF_CHANGE, &qd->qd_flags);
|
|
qc->qc_flags = 0;
|
|
qc->qc_id = 0;
|
|
slot_put(qd);
|
|
qd_put(qd);
|
|
} else if (!test_and_set_bit(QDF_CHANGE, &qd->qd_flags)) {
|
|
qd_hold(qd);
|
|
slot_hold(qd);
|
|
}
|
|
|
|
mutex_unlock(&sdp->sd_quota_mutex);
|
|
}
|
|
|
|
/**
|
|
* gfs2_adjust_quota - adjust record of current block usage
|
|
* @ip: The quota inode
|
|
* @loc: Offset of the entry in the quota file
|
|
* @change: The amount of usage change to record
|
|
* @qd: The quota data
|
|
* @fdq: The updated limits to record
|
|
*
|
|
* This function was mostly borrowed from gfs2_block_truncate_page which was
|
|
* in turn mostly borrowed from ext3
|
|
*
|
|
* Returns: 0 or -ve on error
|
|
*/
|
|
|
|
static int gfs2_adjust_quota(struct gfs2_inode *ip, loff_t loc,
|
|
s64 change, struct gfs2_quota_data *qd,
|
|
struct fs_disk_quota *fdq)
|
|
{
|
|
struct inode *inode = &ip->i_inode;
|
|
struct gfs2_sbd *sdp = GFS2_SB(inode);
|
|
struct address_space *mapping = inode->i_mapping;
|
|
unsigned long index = loc >> PAGE_CACHE_SHIFT;
|
|
unsigned offset = loc & (PAGE_CACHE_SIZE - 1);
|
|
unsigned blocksize, iblock, pos;
|
|
struct buffer_head *bh;
|
|
struct page *page;
|
|
void *kaddr, *ptr;
|
|
struct gfs2_quota q, *qp;
|
|
int err, nbytes;
|
|
u64 size;
|
|
|
|
if (gfs2_is_stuffed(ip)) {
|
|
err = gfs2_unstuff_dinode(ip, NULL);
|
|
if (err)
|
|
return err;
|
|
}
|
|
|
|
memset(&q, 0, sizeof(struct gfs2_quota));
|
|
err = gfs2_internal_read(ip, (char *)&q, &loc, sizeof(q));
|
|
if (err < 0)
|
|
return err;
|
|
|
|
err = -EIO;
|
|
qp = &q;
|
|
qp->qu_value = be64_to_cpu(qp->qu_value);
|
|
qp->qu_value += change;
|
|
qp->qu_value = cpu_to_be64(qp->qu_value);
|
|
qd->qd_qb.qb_value = qp->qu_value;
|
|
if (fdq) {
|
|
if (fdq->d_fieldmask & FS_DQ_BSOFT) {
|
|
qp->qu_warn = cpu_to_be64(fdq->d_blk_softlimit >> sdp->sd_fsb2bb_shift);
|
|
qd->qd_qb.qb_warn = qp->qu_warn;
|
|
}
|
|
if (fdq->d_fieldmask & FS_DQ_BHARD) {
|
|
qp->qu_limit = cpu_to_be64(fdq->d_blk_hardlimit >> sdp->sd_fsb2bb_shift);
|
|
qd->qd_qb.qb_limit = qp->qu_limit;
|
|
}
|
|
if (fdq->d_fieldmask & FS_DQ_BCOUNT) {
|
|
qp->qu_value = cpu_to_be64(fdq->d_bcount >> sdp->sd_fsb2bb_shift);
|
|
qd->qd_qb.qb_value = qp->qu_value;
|
|
}
|
|
}
|
|
|
|
/* Write the quota into the quota file on disk */
|
|
ptr = qp;
|
|
nbytes = sizeof(struct gfs2_quota);
|
|
get_a_page:
|
|
page = find_or_create_page(mapping, index, GFP_NOFS);
|
|
if (!page)
|
|
return -ENOMEM;
|
|
|
|
blocksize = inode->i_sb->s_blocksize;
|
|
iblock = index << (PAGE_CACHE_SHIFT - inode->i_sb->s_blocksize_bits);
|
|
|
|
if (!page_has_buffers(page))
|
|
create_empty_buffers(page, blocksize, 0);
|
|
|
|
bh = page_buffers(page);
|
|
pos = blocksize;
|
|
while (offset >= pos) {
|
|
bh = bh->b_this_page;
|
|
iblock++;
|
|
pos += blocksize;
|
|
}
|
|
|
|
if (!buffer_mapped(bh)) {
|
|
gfs2_block_map(inode, iblock, bh, 1);
|
|
if (!buffer_mapped(bh))
|
|
goto unlock_out;
|
|
/* If it's a newly allocated disk block for quota, zero it */
|
|
if (buffer_new(bh))
|
|
zero_user(page, pos - blocksize, bh->b_size);
|
|
}
|
|
|
|
if (PageUptodate(page))
|
|
set_buffer_uptodate(bh);
|
|
|
|
if (!buffer_uptodate(bh)) {
|
|
ll_rw_block(READ | REQ_META, 1, &bh);
|
|
wait_on_buffer(bh);
|
|
if (!buffer_uptodate(bh))
|
|
goto unlock_out;
|
|
}
|
|
|
|
gfs2_trans_add_bh(ip->i_gl, bh, 0);
|
|
|
|
kaddr = kmap_atomic(page);
|
|
if (offset + sizeof(struct gfs2_quota) > PAGE_CACHE_SIZE)
|
|
nbytes = PAGE_CACHE_SIZE - offset;
|
|
memcpy(kaddr + offset, ptr, nbytes);
|
|
flush_dcache_page(page);
|
|
kunmap_atomic(kaddr);
|
|
unlock_page(page);
|
|
page_cache_release(page);
|
|
|
|
/* If quota straddles page boundary, we need to update the rest of the
|
|
* quota at the beginning of the next page */
|
|
if ((offset + sizeof(struct gfs2_quota)) > PAGE_CACHE_SIZE) {
|
|
ptr = ptr + nbytes;
|
|
nbytes = sizeof(struct gfs2_quota) - nbytes;
|
|
offset = 0;
|
|
index++;
|
|
goto get_a_page;
|
|
}
|
|
|
|
size = loc + sizeof(struct gfs2_quota);
|
|
if (size > inode->i_size)
|
|
i_size_write(inode, size);
|
|
inode->i_mtime = inode->i_atime = CURRENT_TIME;
|
|
mark_inode_dirty(inode);
|
|
return 0;
|
|
|
|
unlock_out:
|
|
unlock_page(page);
|
|
page_cache_release(page);
|
|
return err;
|
|
}
|
|
|
|
static int do_sync(unsigned int num_qd, struct gfs2_quota_data **qda)
|
|
{
|
|
struct gfs2_sbd *sdp = (*qda)->qd_gl->gl_sbd;
|
|
struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
|
|
unsigned int data_blocks, ind_blocks;
|
|
struct gfs2_holder *ghs, i_gh;
|
|
unsigned int qx, x;
|
|
struct gfs2_quota_data *qd;
|
|
unsigned reserved;
|
|
loff_t offset;
|
|
unsigned int nalloc = 0, blocks;
|
|
int error;
|
|
|
|
error = gfs2_rs_alloc(ip);
|
|
if (error)
|
|
return error;
|
|
|
|
gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota),
|
|
&data_blocks, &ind_blocks);
|
|
|
|
ghs = kcalloc(num_qd, sizeof(struct gfs2_holder), GFP_NOFS);
|
|
if (!ghs)
|
|
return -ENOMEM;
|
|
|
|
sort(qda, num_qd, sizeof(struct gfs2_quota_data *), sort_qd, NULL);
|
|
mutex_lock(&ip->i_inode.i_mutex);
|
|
for (qx = 0; qx < num_qd; qx++) {
|
|
error = gfs2_glock_nq_init(qda[qx]->qd_gl, LM_ST_EXCLUSIVE,
|
|
GL_NOCACHE, &ghs[qx]);
|
|
if (error)
|
|
goto out;
|
|
}
|
|
|
|
error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
|
|
if (error)
|
|
goto out;
|
|
|
|
for (x = 0; x < num_qd; x++) {
|
|
offset = qd2offset(qda[x]);
|
|
if (gfs2_write_alloc_required(ip, offset,
|
|
sizeof(struct gfs2_quota)))
|
|
nalloc++;
|
|
}
|
|
|
|
/*
|
|
* 1 blk for unstuffing inode if stuffed. We add this extra
|
|
* block to the reservation unconditionally. If the inode
|
|
* doesn't need unstuffing, the block will be released to the
|
|
* rgrp since it won't be allocated during the transaction
|
|
*/
|
|
/* +3 in the end for unstuffing block, inode size update block
|
|
* and another block in case quota straddles page boundary and
|
|
* two blocks need to be updated instead of 1 */
|
|
blocks = num_qd * data_blocks + RES_DINODE + num_qd + 3;
|
|
|
|
reserved = 1 + (nalloc * (data_blocks + ind_blocks));
|
|
error = gfs2_inplace_reserve(ip, reserved, 0);
|
|
if (error)
|
|
goto out_alloc;
|
|
|
|
if (nalloc)
|
|
blocks += gfs2_rg_blocks(ip, reserved) + nalloc * ind_blocks + RES_STATFS;
|
|
|
|
error = gfs2_trans_begin(sdp, blocks, 0);
|
|
if (error)
|
|
goto out_ipres;
|
|
|
|
for (x = 0; x < num_qd; x++) {
|
|
qd = qda[x];
|
|
offset = qd2offset(qd);
|
|
error = gfs2_adjust_quota(ip, offset, qd->qd_change_sync, qd, NULL);
|
|
if (error)
|
|
goto out_end_trans;
|
|
|
|
do_qc(qd, -qd->qd_change_sync);
|
|
set_bit(QDF_REFRESH, &qd->qd_flags);
|
|
}
|
|
|
|
error = 0;
|
|
|
|
out_end_trans:
|
|
gfs2_trans_end(sdp);
|
|
out_ipres:
|
|
gfs2_inplace_release(ip);
|
|
out_alloc:
|
|
gfs2_glock_dq_uninit(&i_gh);
|
|
out:
|
|
while (qx--)
|
|
gfs2_glock_dq_uninit(&ghs[qx]);
|
|
mutex_unlock(&ip->i_inode.i_mutex);
|
|
kfree(ghs);
|
|
gfs2_log_flush(ip->i_gl->gl_sbd, ip->i_gl);
|
|
return error;
|
|
}
|
|
|
|
static int update_qd(struct gfs2_sbd *sdp, struct gfs2_quota_data *qd)
|
|
{
|
|
struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
|
|
struct gfs2_quota q;
|
|
struct gfs2_quota_lvb *qlvb;
|
|
loff_t pos;
|
|
int error;
|
|
|
|
memset(&q, 0, sizeof(struct gfs2_quota));
|
|
pos = qd2offset(qd);
|
|
error = gfs2_internal_read(ip, (char *)&q, &pos, sizeof(q));
|
|
if (error < 0)
|
|
return error;
|
|
|
|
qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr;
|
|
qlvb->qb_magic = cpu_to_be32(GFS2_MAGIC);
|
|
qlvb->__pad = 0;
|
|
qlvb->qb_limit = q.qu_limit;
|
|
qlvb->qb_warn = q.qu_warn;
|
|
qlvb->qb_value = q.qu_value;
|
|
qd->qd_qb = *qlvb;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int do_glock(struct gfs2_quota_data *qd, int force_refresh,
|
|
struct gfs2_holder *q_gh)
|
|
{
|
|
struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
|
|
struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
|
|
struct gfs2_holder i_gh;
|
|
int error;
|
|
|
|
restart:
|
|
error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_SHARED, 0, q_gh);
|
|
if (error)
|
|
return error;
|
|
|
|
qd->qd_qb = *(struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr;
|
|
|
|
if (force_refresh || qd->qd_qb.qb_magic != cpu_to_be32(GFS2_MAGIC)) {
|
|
gfs2_glock_dq_uninit(q_gh);
|
|
error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE,
|
|
GL_NOCACHE, q_gh);
|
|
if (error)
|
|
return error;
|
|
|
|
error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh);
|
|
if (error)
|
|
goto fail;
|
|
|
|
error = update_qd(sdp, qd);
|
|
if (error)
|
|
goto fail_gunlock;
|
|
|
|
gfs2_glock_dq_uninit(&i_gh);
|
|
gfs2_glock_dq_uninit(q_gh);
|
|
force_refresh = 0;
|
|
goto restart;
|
|
}
|
|
|
|
return 0;
|
|
|
|
fail_gunlock:
|
|
gfs2_glock_dq_uninit(&i_gh);
|
|
fail:
|
|
gfs2_glock_dq_uninit(q_gh);
|
|
return error;
|
|
}
|
|
|
|
int gfs2_quota_lock(struct gfs2_inode *ip, kuid_t uid, kgid_t gid)
|
|
{
|
|
struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
|
|
struct gfs2_quota_data *qd;
|
|
unsigned int x;
|
|
int error = 0;
|
|
|
|
error = gfs2_quota_hold(ip, uid, gid);
|
|
if (error)
|
|
return error;
|
|
|
|
if (capable(CAP_SYS_RESOURCE) ||
|
|
sdp->sd_args.ar_quota != GFS2_QUOTA_ON)
|
|
return 0;
|
|
|
|
sort(ip->i_res->rs_qa_qd, ip->i_res->rs_qa_qd_num,
|
|
sizeof(struct gfs2_quota_data *), sort_qd, NULL);
|
|
|
|
for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) {
|
|
int force = NO_FORCE;
|
|
qd = ip->i_res->rs_qa_qd[x];
|
|
if (test_and_clear_bit(QDF_REFRESH, &qd->qd_flags))
|
|
force = FORCE;
|
|
error = do_glock(qd, force, &ip->i_res->rs_qa_qd_ghs[x]);
|
|
if (error)
|
|
break;
|
|
}
|
|
|
|
if (!error)
|
|
set_bit(GIF_QD_LOCKED, &ip->i_flags);
|
|
else {
|
|
while (x--)
|
|
gfs2_glock_dq_uninit(&ip->i_res->rs_qa_qd_ghs[x]);
|
|
gfs2_quota_unhold(ip);
|
|
}
|
|
|
|
return error;
|
|
}
|
|
|
|
static int need_sync(struct gfs2_quota_data *qd)
|
|
{
|
|
struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
|
|
struct gfs2_tune *gt = &sdp->sd_tune;
|
|
s64 value;
|
|
unsigned int num, den;
|
|
int do_sync = 1;
|
|
|
|
if (!qd->qd_qb.qb_limit)
|
|
return 0;
|
|
|
|
spin_lock(&qd_lru_lock);
|
|
value = qd->qd_change;
|
|
spin_unlock(&qd_lru_lock);
|
|
|
|
spin_lock(>->gt_spin);
|
|
num = gt->gt_quota_scale_num;
|
|
den = gt->gt_quota_scale_den;
|
|
spin_unlock(>->gt_spin);
|
|
|
|
if (value < 0)
|
|
do_sync = 0;
|
|
else if ((s64)be64_to_cpu(qd->qd_qb.qb_value) >=
|
|
(s64)be64_to_cpu(qd->qd_qb.qb_limit))
|
|
do_sync = 0;
|
|
else {
|
|
value *= gfs2_jindex_size(sdp) * num;
|
|
value = div_s64(value, den);
|
|
value += (s64)be64_to_cpu(qd->qd_qb.qb_value);
|
|
if (value < (s64)be64_to_cpu(qd->qd_qb.qb_limit))
|
|
do_sync = 0;
|
|
}
|
|
|
|
return do_sync;
|
|
}
|
|
|
|
void gfs2_quota_unlock(struct gfs2_inode *ip)
|
|
{
|
|
struct gfs2_quota_data *qda[4];
|
|
unsigned int count = 0;
|
|
unsigned int x;
|
|
|
|
if (!test_and_clear_bit(GIF_QD_LOCKED, &ip->i_flags))
|
|
goto out;
|
|
|
|
for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) {
|
|
struct gfs2_quota_data *qd;
|
|
int sync;
|
|
|
|
qd = ip->i_res->rs_qa_qd[x];
|
|
sync = need_sync(qd);
|
|
|
|
gfs2_glock_dq_uninit(&ip->i_res->rs_qa_qd_ghs[x]);
|
|
|
|
if (sync && qd_trylock(qd))
|
|
qda[count++] = qd;
|
|
}
|
|
|
|
if (count) {
|
|
do_sync(count, qda);
|
|
for (x = 0; x < count; x++)
|
|
qd_unlock(qda[x]);
|
|
}
|
|
|
|
out:
|
|
gfs2_quota_unhold(ip);
|
|
}
|
|
|
|
#define MAX_LINE 256
|
|
|
|
static int print_message(struct gfs2_quota_data *qd, char *type)
|
|
{
|
|
struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
|
|
|
|
printk(KERN_INFO "GFS2: fsid=%s: quota %s for %s %u\n",
|
|
sdp->sd_fsname, type,
|
|
(qd->qd_id.type == USRQUOTA) ? "user" : "group",
|
|
from_kqid(&init_user_ns, qd->qd_id));
|
|
|
|
return 0;
|
|
}
|
|
|
|
int gfs2_quota_check(struct gfs2_inode *ip, kuid_t uid, kgid_t gid)
|
|
{
|
|
struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
|
|
struct gfs2_quota_data *qd;
|
|
s64 value;
|
|
unsigned int x;
|
|
int error = 0;
|
|
|
|
if (!test_bit(GIF_QD_LOCKED, &ip->i_flags))
|
|
return 0;
|
|
|
|
if (sdp->sd_args.ar_quota != GFS2_QUOTA_ON)
|
|
return 0;
|
|
|
|
for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) {
|
|
qd = ip->i_res->rs_qa_qd[x];
|
|
|
|
if (!(qid_eq(qd->qd_id, make_kqid_uid(uid)) ||
|
|
qid_eq(qd->qd_id, make_kqid_gid(gid))))
|
|
continue;
|
|
|
|
value = (s64)be64_to_cpu(qd->qd_qb.qb_value);
|
|
spin_lock(&qd_lru_lock);
|
|
value += qd->qd_change;
|
|
spin_unlock(&qd_lru_lock);
|
|
|
|
if (be64_to_cpu(qd->qd_qb.qb_limit) && (s64)be64_to_cpu(qd->qd_qb.qb_limit) < value) {
|
|
print_message(qd, "exceeded");
|
|
quota_send_warning(qd->qd_id,
|
|
sdp->sd_vfs->s_dev, QUOTA_NL_BHARDWARN);
|
|
|
|
error = -EDQUOT;
|
|
break;
|
|
} else if (be64_to_cpu(qd->qd_qb.qb_warn) &&
|
|
(s64)be64_to_cpu(qd->qd_qb.qb_warn) < value &&
|
|
time_after_eq(jiffies, qd->qd_last_warn +
|
|
gfs2_tune_get(sdp,
|
|
gt_quota_warn_period) * HZ)) {
|
|
quota_send_warning(qd->qd_id,
|
|
sdp->sd_vfs->s_dev, QUOTA_NL_BSOFTWARN);
|
|
error = print_message(qd, "warning");
|
|
qd->qd_last_warn = jiffies;
|
|
}
|
|
}
|
|
|
|
return error;
|
|
}
|
|
|
|
void gfs2_quota_change(struct gfs2_inode *ip, s64 change,
|
|
kuid_t uid, kgid_t gid)
|
|
{
|
|
struct gfs2_quota_data *qd;
|
|
unsigned int x;
|
|
|
|
if (gfs2_assert_warn(GFS2_SB(&ip->i_inode), change))
|
|
return;
|
|
if (ip->i_diskflags & GFS2_DIF_SYSTEM)
|
|
return;
|
|
|
|
for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) {
|
|
qd = ip->i_res->rs_qa_qd[x];
|
|
|
|
if (qid_eq(qd->qd_id, make_kqid_uid(uid)) ||
|
|
qid_eq(qd->qd_id, make_kqid_gid(gid))) {
|
|
do_qc(qd, change);
|
|
}
|
|
}
|
|
}
|
|
|
|
int gfs2_quota_sync(struct super_block *sb, int type)
|
|
{
|
|
struct gfs2_sbd *sdp = sb->s_fs_info;
|
|
struct gfs2_quota_data **qda;
|
|
unsigned int max_qd = gfs2_tune_get(sdp, gt_quota_simul_sync);
|
|
unsigned int num_qd;
|
|
unsigned int x;
|
|
int error = 0;
|
|
|
|
sdp->sd_quota_sync_gen++;
|
|
|
|
qda = kcalloc(max_qd, sizeof(struct gfs2_quota_data *), GFP_KERNEL);
|
|
if (!qda)
|
|
return -ENOMEM;
|
|
|
|
do {
|
|
num_qd = 0;
|
|
|
|
for (;;) {
|
|
error = qd_fish(sdp, qda + num_qd);
|
|
if (error || !qda[num_qd])
|
|
break;
|
|
if (++num_qd == max_qd)
|
|
break;
|
|
}
|
|
|
|
if (num_qd) {
|
|
if (!error)
|
|
error = do_sync(num_qd, qda);
|
|
if (!error)
|
|
for (x = 0; x < num_qd; x++)
|
|
qda[x]->qd_sync_gen =
|
|
sdp->sd_quota_sync_gen;
|
|
|
|
for (x = 0; x < num_qd; x++)
|
|
qd_unlock(qda[x]);
|
|
}
|
|
} while (!error && num_qd == max_qd);
|
|
|
|
kfree(qda);
|
|
|
|
return error;
|
|
}
|
|
|
|
static int gfs2_quota_sync_timeo(struct super_block *sb, int type)
|
|
{
|
|
return gfs2_quota_sync(sb, type);
|
|
}
|
|
|
|
int gfs2_quota_refresh(struct gfs2_sbd *sdp, struct kqid qid)
|
|
{
|
|
struct gfs2_quota_data *qd;
|
|
struct gfs2_holder q_gh;
|
|
int error;
|
|
|
|
error = qd_get(sdp, qid, &qd);
|
|
if (error)
|
|
return error;
|
|
|
|
error = do_glock(qd, FORCE, &q_gh);
|
|
if (!error)
|
|
gfs2_glock_dq_uninit(&q_gh);
|
|
|
|
qd_put(qd);
|
|
return error;
|
|
}
|
|
|
|
static void gfs2_quota_change_in(struct gfs2_quota_change_host *qc, const void *buf)
|
|
{
|
|
const struct gfs2_quota_change *str = buf;
|
|
|
|
qc->qc_change = be64_to_cpu(str->qc_change);
|
|
qc->qc_flags = be32_to_cpu(str->qc_flags);
|
|
qc->qc_id = make_kqid(&init_user_ns,
|
|
(qc->qc_flags & GFS2_QCF_USER)?USRQUOTA:GRPQUOTA,
|
|
be32_to_cpu(str->qc_id));
|
|
}
|
|
|
|
int gfs2_quota_init(struct gfs2_sbd *sdp)
|
|
{
|
|
struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode);
|
|
u64 size = i_size_read(sdp->sd_qc_inode);
|
|
unsigned int blocks = size >> sdp->sd_sb.sb_bsize_shift;
|
|
unsigned int x, slot = 0;
|
|
unsigned int found = 0;
|
|
u64 dblock;
|
|
u32 extlen = 0;
|
|
int error;
|
|
|
|
if (gfs2_check_internal_file_size(sdp->sd_qc_inode, 1, 64 << 20))
|
|
return -EIO;
|
|
|
|
sdp->sd_quota_slots = blocks * sdp->sd_qc_per_block;
|
|
sdp->sd_quota_chunks = DIV_ROUND_UP(sdp->sd_quota_slots, 8 * PAGE_SIZE);
|
|
|
|
error = -ENOMEM;
|
|
|
|
sdp->sd_quota_bitmap = kcalloc(sdp->sd_quota_chunks,
|
|
sizeof(unsigned char *), GFP_NOFS);
|
|
if (!sdp->sd_quota_bitmap)
|
|
return error;
|
|
|
|
for (x = 0; x < sdp->sd_quota_chunks; x++) {
|
|
sdp->sd_quota_bitmap[x] = kzalloc(PAGE_SIZE, GFP_NOFS);
|
|
if (!sdp->sd_quota_bitmap[x])
|
|
goto fail;
|
|
}
|
|
|
|
for (x = 0; x < blocks; x++) {
|
|
struct buffer_head *bh;
|
|
unsigned int y;
|
|
|
|
if (!extlen) {
|
|
int new = 0;
|
|
error = gfs2_extent_map(&ip->i_inode, x, &new, &dblock, &extlen);
|
|
if (error)
|
|
goto fail;
|
|
}
|
|
error = -EIO;
|
|
bh = gfs2_meta_ra(ip->i_gl, dblock, extlen);
|
|
if (!bh)
|
|
goto fail;
|
|
if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC)) {
|
|
brelse(bh);
|
|
goto fail;
|
|
}
|
|
|
|
for (y = 0; y < sdp->sd_qc_per_block && slot < sdp->sd_quota_slots;
|
|
y++, slot++) {
|
|
struct gfs2_quota_change_host qc;
|
|
struct gfs2_quota_data *qd;
|
|
|
|
gfs2_quota_change_in(&qc, bh->b_data +
|
|
sizeof(struct gfs2_meta_header) +
|
|
y * sizeof(struct gfs2_quota_change));
|
|
if (!qc.qc_change)
|
|
continue;
|
|
|
|
error = qd_alloc(sdp, qc.qc_id, &qd);
|
|
if (error) {
|
|
brelse(bh);
|
|
goto fail;
|
|
}
|
|
|
|
set_bit(QDF_CHANGE, &qd->qd_flags);
|
|
qd->qd_change = qc.qc_change;
|
|
qd->qd_slot = slot;
|
|
qd->qd_slot_count = 1;
|
|
|
|
spin_lock(&qd_lru_lock);
|
|
gfs2_icbit_munge(sdp, sdp->sd_quota_bitmap, slot, 1);
|
|
list_add(&qd->qd_list, &sdp->sd_quota_list);
|
|
atomic_inc(&sdp->sd_quota_count);
|
|
spin_unlock(&qd_lru_lock);
|
|
|
|
found++;
|
|
}
|
|
|
|
brelse(bh);
|
|
dblock++;
|
|
extlen--;
|
|
}
|
|
|
|
if (found)
|
|
fs_info(sdp, "found %u quota changes\n", found);
|
|
|
|
return 0;
|
|
|
|
fail:
|
|
gfs2_quota_cleanup(sdp);
|
|
return error;
|
|
}
|
|
|
|
void gfs2_quota_cleanup(struct gfs2_sbd *sdp)
|
|
{
|
|
struct list_head *head = &sdp->sd_quota_list;
|
|
struct gfs2_quota_data *qd;
|
|
unsigned int x;
|
|
|
|
spin_lock(&qd_lru_lock);
|
|
while (!list_empty(head)) {
|
|
qd = list_entry(head->prev, struct gfs2_quota_data, qd_list);
|
|
|
|
if (atomic_read(&qd->qd_count) > 1 ||
|
|
(atomic_read(&qd->qd_count) &&
|
|
!test_bit(QDF_CHANGE, &qd->qd_flags))) {
|
|
list_move(&qd->qd_list, head);
|
|
spin_unlock(&qd_lru_lock);
|
|
schedule();
|
|
spin_lock(&qd_lru_lock);
|
|
continue;
|
|
}
|
|
|
|
list_del(&qd->qd_list);
|
|
/* Also remove if this qd exists in the reclaim list */
|
|
if (!list_empty(&qd->qd_reclaim)) {
|
|
list_del_init(&qd->qd_reclaim);
|
|
atomic_dec(&qd_lru_count);
|
|
}
|
|
atomic_dec(&sdp->sd_quota_count);
|
|
spin_unlock(&qd_lru_lock);
|
|
|
|
if (!atomic_read(&qd->qd_count)) {
|
|
gfs2_assert_warn(sdp, !qd->qd_change);
|
|
gfs2_assert_warn(sdp, !qd->qd_slot_count);
|
|
} else
|
|
gfs2_assert_warn(sdp, qd->qd_slot_count == 1);
|
|
gfs2_assert_warn(sdp, !qd->qd_bh_count);
|
|
|
|
gfs2_glock_put(qd->qd_gl);
|
|
kmem_cache_free(gfs2_quotad_cachep, qd);
|
|
|
|
spin_lock(&qd_lru_lock);
|
|
}
|
|
spin_unlock(&qd_lru_lock);
|
|
|
|
gfs2_assert_warn(sdp, !atomic_read(&sdp->sd_quota_count));
|
|
|
|
if (sdp->sd_quota_bitmap) {
|
|
for (x = 0; x < sdp->sd_quota_chunks; x++)
|
|
kfree(sdp->sd_quota_bitmap[x]);
|
|
kfree(sdp->sd_quota_bitmap);
|
|
}
|
|
}
|
|
|
|
static void quotad_error(struct gfs2_sbd *sdp, const char *msg, int error)
|
|
{
|
|
if (error == 0 || error == -EROFS)
|
|
return;
|
|
if (!test_bit(SDF_SHUTDOWN, &sdp->sd_flags))
|
|
fs_err(sdp, "gfs2_quotad: %s error %d\n", msg, error);
|
|
}
|
|
|
|
static void quotad_check_timeo(struct gfs2_sbd *sdp, const char *msg,
|
|
int (*fxn)(struct super_block *sb, int type),
|
|
unsigned long t, unsigned long *timeo,
|
|
unsigned int *new_timeo)
|
|
{
|
|
if (t >= *timeo) {
|
|
int error = fxn(sdp->sd_vfs, 0);
|
|
quotad_error(sdp, msg, error);
|
|
*timeo = gfs2_tune_get_i(&sdp->sd_tune, new_timeo) * HZ;
|
|
} else {
|
|
*timeo -= t;
|
|
}
|
|
}
|
|
|
|
static void quotad_check_trunc_list(struct gfs2_sbd *sdp)
|
|
{
|
|
struct gfs2_inode *ip;
|
|
|
|
while(1) {
|
|
ip = NULL;
|
|
spin_lock(&sdp->sd_trunc_lock);
|
|
if (!list_empty(&sdp->sd_trunc_list)) {
|
|
ip = list_entry(sdp->sd_trunc_list.next,
|
|
struct gfs2_inode, i_trunc_list);
|
|
list_del_init(&ip->i_trunc_list);
|
|
}
|
|
spin_unlock(&sdp->sd_trunc_lock);
|
|
if (ip == NULL)
|
|
return;
|
|
gfs2_glock_finish_truncate(ip);
|
|
}
|
|
}
|
|
|
|
void gfs2_wake_up_statfs(struct gfs2_sbd *sdp) {
|
|
if (!sdp->sd_statfs_force_sync) {
|
|
sdp->sd_statfs_force_sync = 1;
|
|
wake_up(&sdp->sd_quota_wait);
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* gfs2_quotad - Write cached quota changes into the quota file
|
|
* @sdp: Pointer to GFS2 superblock
|
|
*
|
|
*/
|
|
|
|
int gfs2_quotad(void *data)
|
|
{
|
|
struct gfs2_sbd *sdp = data;
|
|
struct gfs2_tune *tune = &sdp->sd_tune;
|
|
unsigned long statfs_timeo = 0;
|
|
unsigned long quotad_timeo = 0;
|
|
unsigned long t = 0;
|
|
DEFINE_WAIT(wait);
|
|
int empty;
|
|
|
|
while (!kthread_should_stop()) {
|
|
|
|
/* Update the master statfs file */
|
|
if (sdp->sd_statfs_force_sync) {
|
|
int error = gfs2_statfs_sync(sdp->sd_vfs, 0);
|
|
quotad_error(sdp, "statfs", error);
|
|
statfs_timeo = gfs2_tune_get(sdp, gt_statfs_quantum) * HZ;
|
|
}
|
|
else
|
|
quotad_check_timeo(sdp, "statfs", gfs2_statfs_sync, t,
|
|
&statfs_timeo,
|
|
&tune->gt_statfs_quantum);
|
|
|
|
/* Update quota file */
|
|
quotad_check_timeo(sdp, "sync", gfs2_quota_sync_timeo, t,
|
|
"ad_timeo, &tune->gt_quota_quantum);
|
|
|
|
/* Check for & recover partially truncated inodes */
|
|
quotad_check_trunc_list(sdp);
|
|
|
|
try_to_freeze();
|
|
|
|
t = min(quotad_timeo, statfs_timeo);
|
|
|
|
prepare_to_wait(&sdp->sd_quota_wait, &wait, TASK_INTERRUPTIBLE);
|
|
spin_lock(&sdp->sd_trunc_lock);
|
|
empty = list_empty(&sdp->sd_trunc_list);
|
|
spin_unlock(&sdp->sd_trunc_lock);
|
|
if (empty && !sdp->sd_statfs_force_sync)
|
|
t -= schedule_timeout(t);
|
|
else
|
|
t = 0;
|
|
finish_wait(&sdp->sd_quota_wait, &wait);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int gfs2_quota_get_xstate(struct super_block *sb,
|
|
struct fs_quota_stat *fqs)
|
|
{
|
|
struct gfs2_sbd *sdp = sb->s_fs_info;
|
|
|
|
memset(fqs, 0, sizeof(struct fs_quota_stat));
|
|
fqs->qs_version = FS_QSTAT_VERSION;
|
|
|
|
switch (sdp->sd_args.ar_quota) {
|
|
case GFS2_QUOTA_ON:
|
|
fqs->qs_flags |= (FS_QUOTA_UDQ_ENFD | FS_QUOTA_GDQ_ENFD);
|
|
/*FALLTHRU*/
|
|
case GFS2_QUOTA_ACCOUNT:
|
|
fqs->qs_flags |= (FS_QUOTA_UDQ_ACCT | FS_QUOTA_GDQ_ACCT);
|
|
break;
|
|
case GFS2_QUOTA_OFF:
|
|
break;
|
|
}
|
|
|
|
if (sdp->sd_quota_inode) {
|
|
fqs->qs_uquota.qfs_ino = GFS2_I(sdp->sd_quota_inode)->i_no_addr;
|
|
fqs->qs_uquota.qfs_nblks = sdp->sd_quota_inode->i_blocks;
|
|
}
|
|
fqs->qs_uquota.qfs_nextents = 1; /* unsupported */
|
|
fqs->qs_gquota = fqs->qs_uquota; /* its the same inode in both cases */
|
|
fqs->qs_incoredqs = atomic_read(&qd_lru_count);
|
|
return 0;
|
|
}
|
|
|
|
static int gfs2_get_dqblk(struct super_block *sb, struct kqid qid,
|
|
struct fs_disk_quota *fdq)
|
|
{
|
|
struct gfs2_sbd *sdp = sb->s_fs_info;
|
|
struct gfs2_quota_lvb *qlvb;
|
|
struct gfs2_quota_data *qd;
|
|
struct gfs2_holder q_gh;
|
|
int error;
|
|
|
|
memset(fdq, 0, sizeof(struct fs_disk_quota));
|
|
|
|
if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
|
|
return -ESRCH; /* Crazy XFS error code */
|
|
|
|
if ((qid.type != USRQUOTA) &&
|
|
(qid.type != GRPQUOTA))
|
|
return -EINVAL;
|
|
|
|
error = qd_get(sdp, qid, &qd);
|
|
if (error)
|
|
return error;
|
|
error = do_glock(qd, FORCE, &q_gh);
|
|
if (error)
|
|
goto out;
|
|
|
|
qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr;
|
|
fdq->d_version = FS_DQUOT_VERSION;
|
|
fdq->d_flags = (qid.type == USRQUOTA) ? FS_USER_QUOTA : FS_GROUP_QUOTA;
|
|
fdq->d_id = from_kqid_munged(current_user_ns(), qid);
|
|
fdq->d_blk_hardlimit = be64_to_cpu(qlvb->qb_limit) << sdp->sd_fsb2bb_shift;
|
|
fdq->d_blk_softlimit = be64_to_cpu(qlvb->qb_warn) << sdp->sd_fsb2bb_shift;
|
|
fdq->d_bcount = be64_to_cpu(qlvb->qb_value) << sdp->sd_fsb2bb_shift;
|
|
|
|
gfs2_glock_dq_uninit(&q_gh);
|
|
out:
|
|
qd_put(qd);
|
|
return error;
|
|
}
|
|
|
|
/* GFS2 only supports a subset of the XFS fields */
|
|
#define GFS2_FIELDMASK (FS_DQ_BSOFT|FS_DQ_BHARD|FS_DQ_BCOUNT)
|
|
|
|
static int gfs2_set_dqblk(struct super_block *sb, struct kqid qid,
|
|
struct fs_disk_quota *fdq)
|
|
{
|
|
struct gfs2_sbd *sdp = sb->s_fs_info;
|
|
struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
|
|
struct gfs2_quota_data *qd;
|
|
struct gfs2_holder q_gh, i_gh;
|
|
unsigned int data_blocks, ind_blocks;
|
|
unsigned int blocks = 0;
|
|
int alloc_required;
|
|
loff_t offset;
|
|
int error;
|
|
|
|
if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
|
|
return -ESRCH; /* Crazy XFS error code */
|
|
|
|
if ((qid.type != USRQUOTA) &&
|
|
(qid.type != GRPQUOTA))
|
|
return -EINVAL;
|
|
|
|
if (fdq->d_fieldmask & ~GFS2_FIELDMASK)
|
|
return -EINVAL;
|
|
|
|
error = qd_get(sdp, qid, &qd);
|
|
if (error)
|
|
return error;
|
|
|
|
error = gfs2_rs_alloc(ip);
|
|
if (error)
|
|
goto out_put;
|
|
|
|
mutex_lock(&ip->i_inode.i_mutex);
|
|
error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE, 0, &q_gh);
|
|
if (error)
|
|
goto out_unlockput;
|
|
error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
|
|
if (error)
|
|
goto out_q;
|
|
|
|
/* Check for existing entry, if none then alloc new blocks */
|
|
error = update_qd(sdp, qd);
|
|
if (error)
|
|
goto out_i;
|
|
|
|
/* If nothing has changed, this is a no-op */
|
|
if ((fdq->d_fieldmask & FS_DQ_BSOFT) &&
|
|
((fdq->d_blk_softlimit >> sdp->sd_fsb2bb_shift) == be64_to_cpu(qd->qd_qb.qb_warn)))
|
|
fdq->d_fieldmask ^= FS_DQ_BSOFT;
|
|
|
|
if ((fdq->d_fieldmask & FS_DQ_BHARD) &&
|
|
((fdq->d_blk_hardlimit >> sdp->sd_fsb2bb_shift) == be64_to_cpu(qd->qd_qb.qb_limit)))
|
|
fdq->d_fieldmask ^= FS_DQ_BHARD;
|
|
|
|
if ((fdq->d_fieldmask & FS_DQ_BCOUNT) &&
|
|
((fdq->d_bcount >> sdp->sd_fsb2bb_shift) == be64_to_cpu(qd->qd_qb.qb_value)))
|
|
fdq->d_fieldmask ^= FS_DQ_BCOUNT;
|
|
|
|
if (fdq->d_fieldmask == 0)
|
|
goto out_i;
|
|
|
|
offset = qd2offset(qd);
|
|
alloc_required = gfs2_write_alloc_required(ip, offset, sizeof(struct gfs2_quota));
|
|
if (gfs2_is_stuffed(ip))
|
|
alloc_required = 1;
|
|
if (alloc_required) {
|
|
gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota),
|
|
&data_blocks, &ind_blocks);
|
|
blocks = 1 + data_blocks + ind_blocks;
|
|
error = gfs2_inplace_reserve(ip, blocks, 0);
|
|
if (error)
|
|
goto out_i;
|
|
blocks += gfs2_rg_blocks(ip, blocks);
|
|
}
|
|
|
|
/* Some quotas span block boundaries and can update two blocks,
|
|
adding an extra block to the transaction to handle such quotas */
|
|
error = gfs2_trans_begin(sdp, blocks + RES_DINODE + 2, 0);
|
|
if (error)
|
|
goto out_release;
|
|
|
|
/* Apply changes */
|
|
error = gfs2_adjust_quota(ip, offset, 0, qd, fdq);
|
|
|
|
gfs2_trans_end(sdp);
|
|
out_release:
|
|
if (alloc_required)
|
|
gfs2_inplace_release(ip);
|
|
out_i:
|
|
gfs2_glock_dq_uninit(&i_gh);
|
|
out_q:
|
|
gfs2_glock_dq_uninit(&q_gh);
|
|
out_unlockput:
|
|
mutex_unlock(&ip->i_inode.i_mutex);
|
|
out_put:
|
|
qd_put(qd);
|
|
return error;
|
|
}
|
|
|
|
const struct quotactl_ops gfs2_quotactl_ops = {
|
|
.quota_sync = gfs2_quota_sync,
|
|
.get_xstate = gfs2_quota_get_xstate,
|
|
.get_dqblk = gfs2_get_dqblk,
|
|
.set_dqblk = gfs2_set_dqblk,
|
|
};
|