forked from Minki/linux
9086db86e0
This is used by later qgroup fix patches for snapshot. As current snapshot accounting is done by btrfs_qgroup_inherit(), but new extent oriented quota mechanism will account extent from btrfs_copy_root() and other snapshot things, causing wrong result. So add this ability to handle snapshot accounting. Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com> Signed-off-by: Chris Mason <clm@fb.com>
2451 lines
59 KiB
C
2451 lines
59 KiB
C
/*
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* Copyright (C) 2011 STRATO. 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
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* License v2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will 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 GNU
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* 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
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 021110-1307, USA.
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*/
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#include <linux/sched.h>
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#include <linux/pagemap.h>
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#include <linux/writeback.h>
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#include <linux/blkdev.h>
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#include <linux/rbtree.h>
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#include <linux/slab.h>
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#include <linux/workqueue.h>
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#include <linux/btrfs.h>
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#include "ctree.h"
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#include "transaction.h"
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#include "disk-io.h"
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#include "locking.h"
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#include "ulist.h"
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#include "backref.h"
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#include "extent_io.h"
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#include "qgroup.h"
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/* TODO XXX FIXME
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* - subvol delete -> delete when ref goes to 0? delete limits also?
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* - reorganize keys
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* - compressed
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* - sync
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* - copy also limits on subvol creation
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* - limit
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* - caches fuer ulists
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* - performance benchmarks
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* - check all ioctl parameters
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*/
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/*
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* one struct for each qgroup, organized in fs_info->qgroup_tree.
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*/
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struct btrfs_qgroup {
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u64 qgroupid;
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/*
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* state
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*/
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u64 rfer; /* referenced */
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u64 rfer_cmpr; /* referenced compressed */
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u64 excl; /* exclusive */
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u64 excl_cmpr; /* exclusive compressed */
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/*
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* limits
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*/
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u64 lim_flags; /* which limits are set */
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u64 max_rfer;
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u64 max_excl;
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u64 rsv_rfer;
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u64 rsv_excl;
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/*
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* reservation tracking
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*/
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u64 reserved;
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/*
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* lists
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*/
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struct list_head groups; /* groups this group is member of */
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struct list_head members; /* groups that are members of this group */
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struct list_head dirty; /* dirty groups */
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struct rb_node node; /* tree of qgroups */
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/*
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* temp variables for accounting operations
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* Refer to qgroup_shared_accouting() for details.
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*/
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u64 old_refcnt;
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u64 new_refcnt;
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};
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static void btrfs_qgroup_update_old_refcnt(struct btrfs_qgroup *qg, u64 seq,
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int mod)
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{
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if (qg->old_refcnt < seq)
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qg->old_refcnt = seq;
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qg->old_refcnt += mod;
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}
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static void btrfs_qgroup_update_new_refcnt(struct btrfs_qgroup *qg, u64 seq,
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int mod)
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{
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if (qg->new_refcnt < seq)
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qg->new_refcnt = seq;
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qg->new_refcnt += mod;
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}
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static inline u64 btrfs_qgroup_get_old_refcnt(struct btrfs_qgroup *qg, u64 seq)
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{
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if (qg->old_refcnt < seq)
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return 0;
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return qg->old_refcnt - seq;
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}
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static inline u64 btrfs_qgroup_get_new_refcnt(struct btrfs_qgroup *qg, u64 seq)
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{
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if (qg->new_refcnt < seq)
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return 0;
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return qg->new_refcnt - seq;
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}
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/*
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* glue structure to represent the relations between qgroups.
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*/
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struct btrfs_qgroup_list {
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struct list_head next_group;
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struct list_head next_member;
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struct btrfs_qgroup *group;
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struct btrfs_qgroup *member;
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};
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#define ptr_to_u64(x) ((u64)(uintptr_t)x)
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#define u64_to_ptr(x) ((struct btrfs_qgroup *)(uintptr_t)x)
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static int
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qgroup_rescan_init(struct btrfs_fs_info *fs_info, u64 progress_objectid,
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int init_flags);
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static void qgroup_rescan_zero_tracking(struct btrfs_fs_info *fs_info);
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/* must be called with qgroup_ioctl_lock held */
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static struct btrfs_qgroup *find_qgroup_rb(struct btrfs_fs_info *fs_info,
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u64 qgroupid)
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{
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struct rb_node *n = fs_info->qgroup_tree.rb_node;
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struct btrfs_qgroup *qgroup;
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while (n) {
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qgroup = rb_entry(n, struct btrfs_qgroup, node);
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if (qgroup->qgroupid < qgroupid)
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n = n->rb_left;
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else if (qgroup->qgroupid > qgroupid)
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n = n->rb_right;
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else
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return qgroup;
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}
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return NULL;
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}
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/* must be called with qgroup_lock held */
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static struct btrfs_qgroup *add_qgroup_rb(struct btrfs_fs_info *fs_info,
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u64 qgroupid)
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{
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struct rb_node **p = &fs_info->qgroup_tree.rb_node;
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struct rb_node *parent = NULL;
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struct btrfs_qgroup *qgroup;
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while (*p) {
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parent = *p;
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qgroup = rb_entry(parent, struct btrfs_qgroup, node);
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if (qgroup->qgroupid < qgroupid)
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p = &(*p)->rb_left;
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else if (qgroup->qgroupid > qgroupid)
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p = &(*p)->rb_right;
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else
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return qgroup;
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}
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qgroup = kzalloc(sizeof(*qgroup), GFP_ATOMIC);
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if (!qgroup)
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return ERR_PTR(-ENOMEM);
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qgroup->qgroupid = qgroupid;
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INIT_LIST_HEAD(&qgroup->groups);
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INIT_LIST_HEAD(&qgroup->members);
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INIT_LIST_HEAD(&qgroup->dirty);
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rb_link_node(&qgroup->node, parent, p);
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rb_insert_color(&qgroup->node, &fs_info->qgroup_tree);
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return qgroup;
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}
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static void __del_qgroup_rb(struct btrfs_qgroup *qgroup)
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{
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struct btrfs_qgroup_list *list;
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list_del(&qgroup->dirty);
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while (!list_empty(&qgroup->groups)) {
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list = list_first_entry(&qgroup->groups,
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struct btrfs_qgroup_list, next_group);
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list_del(&list->next_group);
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list_del(&list->next_member);
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kfree(list);
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}
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while (!list_empty(&qgroup->members)) {
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list = list_first_entry(&qgroup->members,
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struct btrfs_qgroup_list, next_member);
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list_del(&list->next_group);
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list_del(&list->next_member);
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kfree(list);
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}
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kfree(qgroup);
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}
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/* must be called with qgroup_lock held */
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static int del_qgroup_rb(struct btrfs_fs_info *fs_info, u64 qgroupid)
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{
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struct btrfs_qgroup *qgroup = find_qgroup_rb(fs_info, qgroupid);
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if (!qgroup)
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return -ENOENT;
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rb_erase(&qgroup->node, &fs_info->qgroup_tree);
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__del_qgroup_rb(qgroup);
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return 0;
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}
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/* must be called with qgroup_lock held */
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static int add_relation_rb(struct btrfs_fs_info *fs_info,
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u64 memberid, u64 parentid)
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{
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struct btrfs_qgroup *member;
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struct btrfs_qgroup *parent;
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struct btrfs_qgroup_list *list;
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member = find_qgroup_rb(fs_info, memberid);
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parent = find_qgroup_rb(fs_info, parentid);
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if (!member || !parent)
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return -ENOENT;
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list = kzalloc(sizeof(*list), GFP_ATOMIC);
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if (!list)
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return -ENOMEM;
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list->group = parent;
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list->member = member;
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list_add_tail(&list->next_group, &member->groups);
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list_add_tail(&list->next_member, &parent->members);
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return 0;
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}
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/* must be called with qgroup_lock held */
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static int del_relation_rb(struct btrfs_fs_info *fs_info,
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u64 memberid, u64 parentid)
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{
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struct btrfs_qgroup *member;
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struct btrfs_qgroup *parent;
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struct btrfs_qgroup_list *list;
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member = find_qgroup_rb(fs_info, memberid);
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parent = find_qgroup_rb(fs_info, parentid);
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if (!member || !parent)
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return -ENOENT;
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list_for_each_entry(list, &member->groups, next_group) {
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if (list->group == parent) {
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list_del(&list->next_group);
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list_del(&list->next_member);
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kfree(list);
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return 0;
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}
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}
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return -ENOENT;
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}
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#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
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int btrfs_verify_qgroup_counts(struct btrfs_fs_info *fs_info, u64 qgroupid,
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u64 rfer, u64 excl)
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{
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struct btrfs_qgroup *qgroup;
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qgroup = find_qgroup_rb(fs_info, qgroupid);
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if (!qgroup)
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return -EINVAL;
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if (qgroup->rfer != rfer || qgroup->excl != excl)
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return -EINVAL;
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return 0;
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}
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#endif
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/*
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* The full config is read in one go, only called from open_ctree()
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* It doesn't use any locking, as at this point we're still single-threaded
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*/
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int btrfs_read_qgroup_config(struct btrfs_fs_info *fs_info)
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{
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struct btrfs_key key;
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struct btrfs_key found_key;
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struct btrfs_root *quota_root = fs_info->quota_root;
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struct btrfs_path *path = NULL;
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struct extent_buffer *l;
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int slot;
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int ret = 0;
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u64 flags = 0;
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u64 rescan_progress = 0;
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if (!fs_info->quota_enabled)
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return 0;
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fs_info->qgroup_ulist = ulist_alloc(GFP_NOFS);
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if (!fs_info->qgroup_ulist) {
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ret = -ENOMEM;
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goto out;
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}
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path = btrfs_alloc_path();
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if (!path) {
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ret = -ENOMEM;
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goto out;
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}
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/* default this to quota off, in case no status key is found */
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fs_info->qgroup_flags = 0;
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/*
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* pass 1: read status, all qgroup infos and limits
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*/
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key.objectid = 0;
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key.type = 0;
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key.offset = 0;
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ret = btrfs_search_slot_for_read(quota_root, &key, path, 1, 1);
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if (ret)
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goto out;
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while (1) {
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struct btrfs_qgroup *qgroup;
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slot = path->slots[0];
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l = path->nodes[0];
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btrfs_item_key_to_cpu(l, &found_key, slot);
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if (found_key.type == BTRFS_QGROUP_STATUS_KEY) {
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struct btrfs_qgroup_status_item *ptr;
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ptr = btrfs_item_ptr(l, slot,
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struct btrfs_qgroup_status_item);
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if (btrfs_qgroup_status_version(l, ptr) !=
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BTRFS_QGROUP_STATUS_VERSION) {
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btrfs_err(fs_info,
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"old qgroup version, quota disabled");
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goto out;
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}
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if (btrfs_qgroup_status_generation(l, ptr) !=
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fs_info->generation) {
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flags |= BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT;
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btrfs_err(fs_info,
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"qgroup generation mismatch, "
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"marked as inconsistent");
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}
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fs_info->qgroup_flags = btrfs_qgroup_status_flags(l,
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ptr);
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rescan_progress = btrfs_qgroup_status_rescan(l, ptr);
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goto next1;
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}
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if (found_key.type != BTRFS_QGROUP_INFO_KEY &&
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found_key.type != BTRFS_QGROUP_LIMIT_KEY)
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goto next1;
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qgroup = find_qgroup_rb(fs_info, found_key.offset);
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if ((qgroup && found_key.type == BTRFS_QGROUP_INFO_KEY) ||
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(!qgroup && found_key.type == BTRFS_QGROUP_LIMIT_KEY)) {
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btrfs_err(fs_info, "inconsitent qgroup config");
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flags |= BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT;
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}
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if (!qgroup) {
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qgroup = add_qgroup_rb(fs_info, found_key.offset);
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if (IS_ERR(qgroup)) {
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ret = PTR_ERR(qgroup);
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goto out;
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}
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}
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switch (found_key.type) {
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case BTRFS_QGROUP_INFO_KEY: {
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struct btrfs_qgroup_info_item *ptr;
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ptr = btrfs_item_ptr(l, slot,
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struct btrfs_qgroup_info_item);
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qgroup->rfer = btrfs_qgroup_info_rfer(l, ptr);
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qgroup->rfer_cmpr = btrfs_qgroup_info_rfer_cmpr(l, ptr);
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qgroup->excl = btrfs_qgroup_info_excl(l, ptr);
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qgroup->excl_cmpr = btrfs_qgroup_info_excl_cmpr(l, ptr);
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/* generation currently unused */
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break;
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}
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case BTRFS_QGROUP_LIMIT_KEY: {
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struct btrfs_qgroup_limit_item *ptr;
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ptr = btrfs_item_ptr(l, slot,
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struct btrfs_qgroup_limit_item);
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qgroup->lim_flags = btrfs_qgroup_limit_flags(l, ptr);
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qgroup->max_rfer = btrfs_qgroup_limit_max_rfer(l, ptr);
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qgroup->max_excl = btrfs_qgroup_limit_max_excl(l, ptr);
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qgroup->rsv_rfer = btrfs_qgroup_limit_rsv_rfer(l, ptr);
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qgroup->rsv_excl = btrfs_qgroup_limit_rsv_excl(l, ptr);
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break;
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}
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}
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next1:
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ret = btrfs_next_item(quota_root, path);
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if (ret < 0)
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goto out;
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if (ret)
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break;
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}
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btrfs_release_path(path);
|
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|
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/*
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* pass 2: read all qgroup relations
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*/
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key.objectid = 0;
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key.type = BTRFS_QGROUP_RELATION_KEY;
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key.offset = 0;
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ret = btrfs_search_slot_for_read(quota_root, &key, path, 1, 0);
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if (ret)
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goto out;
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while (1) {
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slot = path->slots[0];
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l = path->nodes[0];
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btrfs_item_key_to_cpu(l, &found_key, slot);
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|
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if (found_key.type != BTRFS_QGROUP_RELATION_KEY)
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goto next2;
|
|
|
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if (found_key.objectid > found_key.offset) {
|
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/* parent <- member, not needed to build config */
|
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/* FIXME should we omit the key completely? */
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goto next2;
|
|
}
|
|
|
|
ret = add_relation_rb(fs_info, found_key.objectid,
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found_key.offset);
|
|
if (ret == -ENOENT) {
|
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btrfs_warn(fs_info,
|
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"orphan qgroup relation 0x%llx->0x%llx",
|
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found_key.objectid, found_key.offset);
|
|
ret = 0; /* ignore the error */
|
|
}
|
|
if (ret)
|
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goto out;
|
|
next2:
|
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ret = btrfs_next_item(quota_root, path);
|
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if (ret < 0)
|
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goto out;
|
|
if (ret)
|
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break;
|
|
}
|
|
out:
|
|
fs_info->qgroup_flags |= flags;
|
|
if (!(fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_ON)) {
|
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fs_info->quota_enabled = 0;
|
|
fs_info->pending_quota_state = 0;
|
|
} else if (fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_RESCAN &&
|
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ret >= 0) {
|
|
ret = qgroup_rescan_init(fs_info, rescan_progress, 0);
|
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}
|
|
btrfs_free_path(path);
|
|
|
|
if (ret < 0) {
|
|
ulist_free(fs_info->qgroup_ulist);
|
|
fs_info->qgroup_ulist = NULL;
|
|
fs_info->qgroup_flags &= ~BTRFS_QGROUP_STATUS_FLAG_RESCAN;
|
|
}
|
|
|
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return ret < 0 ? ret : 0;
|
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}
|
|
|
|
/*
|
|
* This is called from close_ctree() or open_ctree() or btrfs_quota_disable(),
|
|
* first two are in single-threaded paths.And for the third one, we have set
|
|
* quota_root to be null with qgroup_lock held before, so it is safe to clean
|
|
* up the in-memory structures without qgroup_lock held.
|
|
*/
|
|
void btrfs_free_qgroup_config(struct btrfs_fs_info *fs_info)
|
|
{
|
|
struct rb_node *n;
|
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struct btrfs_qgroup *qgroup;
|
|
|
|
while ((n = rb_first(&fs_info->qgroup_tree))) {
|
|
qgroup = rb_entry(n, struct btrfs_qgroup, node);
|
|
rb_erase(n, &fs_info->qgroup_tree);
|
|
__del_qgroup_rb(qgroup);
|
|
}
|
|
/*
|
|
* we call btrfs_free_qgroup_config() when umounting
|
|
* filesystem and disabling quota, so we set qgroup_ulit
|
|
* to be null here to avoid double free.
|
|
*/
|
|
ulist_free(fs_info->qgroup_ulist);
|
|
fs_info->qgroup_ulist = NULL;
|
|
}
|
|
|
|
static int add_qgroup_relation_item(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *quota_root,
|
|
u64 src, u64 dst)
|
|
{
|
|
int ret;
|
|
struct btrfs_path *path;
|
|
struct btrfs_key key;
|
|
|
|
path = btrfs_alloc_path();
|
|
if (!path)
|
|
return -ENOMEM;
|
|
|
|
key.objectid = src;
|
|
key.type = BTRFS_QGROUP_RELATION_KEY;
|
|
key.offset = dst;
|
|
|
|
ret = btrfs_insert_empty_item(trans, quota_root, path, &key, 0);
|
|
|
|
btrfs_mark_buffer_dirty(path->nodes[0]);
|
|
|
|
btrfs_free_path(path);
|
|
return ret;
|
|
}
|
|
|
|
static int del_qgroup_relation_item(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *quota_root,
|
|
u64 src, u64 dst)
|
|
{
|
|
int ret;
|
|
struct btrfs_path *path;
|
|
struct btrfs_key key;
|
|
|
|
path = btrfs_alloc_path();
|
|
if (!path)
|
|
return -ENOMEM;
|
|
|
|
key.objectid = src;
|
|
key.type = BTRFS_QGROUP_RELATION_KEY;
|
|
key.offset = dst;
|
|
|
|
ret = btrfs_search_slot(trans, quota_root, &key, path, -1, 1);
|
|
if (ret < 0)
|
|
goto out;
|
|
|
|
if (ret > 0) {
|
|
ret = -ENOENT;
|
|
goto out;
|
|
}
|
|
|
|
ret = btrfs_del_item(trans, quota_root, path);
|
|
out:
|
|
btrfs_free_path(path);
|
|
return ret;
|
|
}
|
|
|
|
static int add_qgroup_item(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *quota_root, u64 qgroupid)
|
|
{
|
|
int ret;
|
|
struct btrfs_path *path;
|
|
struct btrfs_qgroup_info_item *qgroup_info;
|
|
struct btrfs_qgroup_limit_item *qgroup_limit;
|
|
struct extent_buffer *leaf;
|
|
struct btrfs_key key;
|
|
|
|
if (btrfs_test_is_dummy_root(quota_root))
|
|
return 0;
|
|
|
|
path = btrfs_alloc_path();
|
|
if (!path)
|
|
return -ENOMEM;
|
|
|
|
key.objectid = 0;
|
|
key.type = BTRFS_QGROUP_INFO_KEY;
|
|
key.offset = qgroupid;
|
|
|
|
/*
|
|
* Avoid a transaction abort by catching -EEXIST here. In that
|
|
* case, we proceed by re-initializing the existing structure
|
|
* on disk.
|
|
*/
|
|
|
|
ret = btrfs_insert_empty_item(trans, quota_root, path, &key,
|
|
sizeof(*qgroup_info));
|
|
if (ret && ret != -EEXIST)
|
|
goto out;
|
|
|
|
leaf = path->nodes[0];
|
|
qgroup_info = btrfs_item_ptr(leaf, path->slots[0],
|
|
struct btrfs_qgroup_info_item);
|
|
btrfs_set_qgroup_info_generation(leaf, qgroup_info, trans->transid);
|
|
btrfs_set_qgroup_info_rfer(leaf, qgroup_info, 0);
|
|
btrfs_set_qgroup_info_rfer_cmpr(leaf, qgroup_info, 0);
|
|
btrfs_set_qgroup_info_excl(leaf, qgroup_info, 0);
|
|
btrfs_set_qgroup_info_excl_cmpr(leaf, qgroup_info, 0);
|
|
|
|
btrfs_mark_buffer_dirty(leaf);
|
|
|
|
btrfs_release_path(path);
|
|
|
|
key.type = BTRFS_QGROUP_LIMIT_KEY;
|
|
ret = btrfs_insert_empty_item(trans, quota_root, path, &key,
|
|
sizeof(*qgroup_limit));
|
|
if (ret && ret != -EEXIST)
|
|
goto out;
|
|
|
|
leaf = path->nodes[0];
|
|
qgroup_limit = btrfs_item_ptr(leaf, path->slots[0],
|
|
struct btrfs_qgroup_limit_item);
|
|
btrfs_set_qgroup_limit_flags(leaf, qgroup_limit, 0);
|
|
btrfs_set_qgroup_limit_max_rfer(leaf, qgroup_limit, 0);
|
|
btrfs_set_qgroup_limit_max_excl(leaf, qgroup_limit, 0);
|
|
btrfs_set_qgroup_limit_rsv_rfer(leaf, qgroup_limit, 0);
|
|
btrfs_set_qgroup_limit_rsv_excl(leaf, qgroup_limit, 0);
|
|
|
|
btrfs_mark_buffer_dirty(leaf);
|
|
|
|
ret = 0;
|
|
out:
|
|
btrfs_free_path(path);
|
|
return ret;
|
|
}
|
|
|
|
static int del_qgroup_item(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *quota_root, u64 qgroupid)
|
|
{
|
|
int ret;
|
|
struct btrfs_path *path;
|
|
struct btrfs_key key;
|
|
|
|
path = btrfs_alloc_path();
|
|
if (!path)
|
|
return -ENOMEM;
|
|
|
|
key.objectid = 0;
|
|
key.type = BTRFS_QGROUP_INFO_KEY;
|
|
key.offset = qgroupid;
|
|
ret = btrfs_search_slot(trans, quota_root, &key, path, -1, 1);
|
|
if (ret < 0)
|
|
goto out;
|
|
|
|
if (ret > 0) {
|
|
ret = -ENOENT;
|
|
goto out;
|
|
}
|
|
|
|
ret = btrfs_del_item(trans, quota_root, path);
|
|
if (ret)
|
|
goto out;
|
|
|
|
btrfs_release_path(path);
|
|
|
|
key.type = BTRFS_QGROUP_LIMIT_KEY;
|
|
ret = btrfs_search_slot(trans, quota_root, &key, path, -1, 1);
|
|
if (ret < 0)
|
|
goto out;
|
|
|
|
if (ret > 0) {
|
|
ret = -ENOENT;
|
|
goto out;
|
|
}
|
|
|
|
ret = btrfs_del_item(trans, quota_root, path);
|
|
|
|
out:
|
|
btrfs_free_path(path);
|
|
return ret;
|
|
}
|
|
|
|
static int update_qgroup_limit_item(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
struct btrfs_qgroup *qgroup)
|
|
{
|
|
struct btrfs_path *path;
|
|
struct btrfs_key key;
|
|
struct extent_buffer *l;
|
|
struct btrfs_qgroup_limit_item *qgroup_limit;
|
|
int ret;
|
|
int slot;
|
|
|
|
key.objectid = 0;
|
|
key.type = BTRFS_QGROUP_LIMIT_KEY;
|
|
key.offset = qgroup->qgroupid;
|
|
|
|
path = btrfs_alloc_path();
|
|
if (!path)
|
|
return -ENOMEM;
|
|
|
|
ret = btrfs_search_slot(trans, root, &key, path, 0, 1);
|
|
if (ret > 0)
|
|
ret = -ENOENT;
|
|
|
|
if (ret)
|
|
goto out;
|
|
|
|
l = path->nodes[0];
|
|
slot = path->slots[0];
|
|
qgroup_limit = btrfs_item_ptr(l, slot, struct btrfs_qgroup_limit_item);
|
|
btrfs_set_qgroup_limit_flags(l, qgroup_limit, qgroup->lim_flags);
|
|
btrfs_set_qgroup_limit_max_rfer(l, qgroup_limit, qgroup->max_rfer);
|
|
btrfs_set_qgroup_limit_max_excl(l, qgroup_limit, qgroup->max_excl);
|
|
btrfs_set_qgroup_limit_rsv_rfer(l, qgroup_limit, qgroup->rsv_rfer);
|
|
btrfs_set_qgroup_limit_rsv_excl(l, qgroup_limit, qgroup->rsv_excl);
|
|
|
|
btrfs_mark_buffer_dirty(l);
|
|
|
|
out:
|
|
btrfs_free_path(path);
|
|
return ret;
|
|
}
|
|
|
|
static int update_qgroup_info_item(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
struct btrfs_qgroup *qgroup)
|
|
{
|
|
struct btrfs_path *path;
|
|
struct btrfs_key key;
|
|
struct extent_buffer *l;
|
|
struct btrfs_qgroup_info_item *qgroup_info;
|
|
int ret;
|
|
int slot;
|
|
|
|
if (btrfs_test_is_dummy_root(root))
|
|
return 0;
|
|
|
|
key.objectid = 0;
|
|
key.type = BTRFS_QGROUP_INFO_KEY;
|
|
key.offset = qgroup->qgroupid;
|
|
|
|
path = btrfs_alloc_path();
|
|
if (!path)
|
|
return -ENOMEM;
|
|
|
|
ret = btrfs_search_slot(trans, root, &key, path, 0, 1);
|
|
if (ret > 0)
|
|
ret = -ENOENT;
|
|
|
|
if (ret)
|
|
goto out;
|
|
|
|
l = path->nodes[0];
|
|
slot = path->slots[0];
|
|
qgroup_info = btrfs_item_ptr(l, slot, struct btrfs_qgroup_info_item);
|
|
btrfs_set_qgroup_info_generation(l, qgroup_info, trans->transid);
|
|
btrfs_set_qgroup_info_rfer(l, qgroup_info, qgroup->rfer);
|
|
btrfs_set_qgroup_info_rfer_cmpr(l, qgroup_info, qgroup->rfer_cmpr);
|
|
btrfs_set_qgroup_info_excl(l, qgroup_info, qgroup->excl);
|
|
btrfs_set_qgroup_info_excl_cmpr(l, qgroup_info, qgroup->excl_cmpr);
|
|
|
|
btrfs_mark_buffer_dirty(l);
|
|
|
|
out:
|
|
btrfs_free_path(path);
|
|
return ret;
|
|
}
|
|
|
|
static int update_qgroup_status_item(struct btrfs_trans_handle *trans,
|
|
struct btrfs_fs_info *fs_info,
|
|
struct btrfs_root *root)
|
|
{
|
|
struct btrfs_path *path;
|
|
struct btrfs_key key;
|
|
struct extent_buffer *l;
|
|
struct btrfs_qgroup_status_item *ptr;
|
|
int ret;
|
|
int slot;
|
|
|
|
key.objectid = 0;
|
|
key.type = BTRFS_QGROUP_STATUS_KEY;
|
|
key.offset = 0;
|
|
|
|
path = btrfs_alloc_path();
|
|
if (!path)
|
|
return -ENOMEM;
|
|
|
|
ret = btrfs_search_slot(trans, root, &key, path, 0, 1);
|
|
if (ret > 0)
|
|
ret = -ENOENT;
|
|
|
|
if (ret)
|
|
goto out;
|
|
|
|
l = path->nodes[0];
|
|
slot = path->slots[0];
|
|
ptr = btrfs_item_ptr(l, slot, struct btrfs_qgroup_status_item);
|
|
btrfs_set_qgroup_status_flags(l, ptr, fs_info->qgroup_flags);
|
|
btrfs_set_qgroup_status_generation(l, ptr, trans->transid);
|
|
btrfs_set_qgroup_status_rescan(l, ptr,
|
|
fs_info->qgroup_rescan_progress.objectid);
|
|
|
|
btrfs_mark_buffer_dirty(l);
|
|
|
|
out:
|
|
btrfs_free_path(path);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* called with qgroup_lock held
|
|
*/
|
|
static int btrfs_clean_quota_tree(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root)
|
|
{
|
|
struct btrfs_path *path;
|
|
struct btrfs_key key;
|
|
struct extent_buffer *leaf = NULL;
|
|
int ret;
|
|
int nr = 0;
|
|
|
|
path = btrfs_alloc_path();
|
|
if (!path)
|
|
return -ENOMEM;
|
|
|
|
path->leave_spinning = 1;
|
|
|
|
key.objectid = 0;
|
|
key.offset = 0;
|
|
key.type = 0;
|
|
|
|
while (1) {
|
|
ret = btrfs_search_slot(trans, root, &key, path, -1, 1);
|
|
if (ret < 0)
|
|
goto out;
|
|
leaf = path->nodes[0];
|
|
nr = btrfs_header_nritems(leaf);
|
|
if (!nr)
|
|
break;
|
|
/*
|
|
* delete the leaf one by one
|
|
* since the whole tree is going
|
|
* to be deleted.
|
|
*/
|
|
path->slots[0] = 0;
|
|
ret = btrfs_del_items(trans, root, path, 0, nr);
|
|
if (ret)
|
|
goto out;
|
|
|
|
btrfs_release_path(path);
|
|
}
|
|
ret = 0;
|
|
out:
|
|
root->fs_info->pending_quota_state = 0;
|
|
btrfs_free_path(path);
|
|
return ret;
|
|
}
|
|
|
|
int btrfs_quota_enable(struct btrfs_trans_handle *trans,
|
|
struct btrfs_fs_info *fs_info)
|
|
{
|
|
struct btrfs_root *quota_root;
|
|
struct btrfs_root *tree_root = fs_info->tree_root;
|
|
struct btrfs_path *path = NULL;
|
|
struct btrfs_qgroup_status_item *ptr;
|
|
struct extent_buffer *leaf;
|
|
struct btrfs_key key;
|
|
struct btrfs_key found_key;
|
|
struct btrfs_qgroup *qgroup = NULL;
|
|
int ret = 0;
|
|
int slot;
|
|
|
|
mutex_lock(&fs_info->qgroup_ioctl_lock);
|
|
if (fs_info->quota_root) {
|
|
fs_info->pending_quota_state = 1;
|
|
goto out;
|
|
}
|
|
|
|
fs_info->qgroup_ulist = ulist_alloc(GFP_NOFS);
|
|
if (!fs_info->qgroup_ulist) {
|
|
ret = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* initially create the quota tree
|
|
*/
|
|
quota_root = btrfs_create_tree(trans, fs_info,
|
|
BTRFS_QUOTA_TREE_OBJECTID);
|
|
if (IS_ERR(quota_root)) {
|
|
ret = PTR_ERR(quota_root);
|
|
goto out;
|
|
}
|
|
|
|
path = btrfs_alloc_path();
|
|
if (!path) {
|
|
ret = -ENOMEM;
|
|
goto out_free_root;
|
|
}
|
|
|
|
key.objectid = 0;
|
|
key.type = BTRFS_QGROUP_STATUS_KEY;
|
|
key.offset = 0;
|
|
|
|
ret = btrfs_insert_empty_item(trans, quota_root, path, &key,
|
|
sizeof(*ptr));
|
|
if (ret)
|
|
goto out_free_path;
|
|
|
|
leaf = path->nodes[0];
|
|
ptr = btrfs_item_ptr(leaf, path->slots[0],
|
|
struct btrfs_qgroup_status_item);
|
|
btrfs_set_qgroup_status_generation(leaf, ptr, trans->transid);
|
|
btrfs_set_qgroup_status_version(leaf, ptr, BTRFS_QGROUP_STATUS_VERSION);
|
|
fs_info->qgroup_flags = BTRFS_QGROUP_STATUS_FLAG_ON |
|
|
BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT;
|
|
btrfs_set_qgroup_status_flags(leaf, ptr, fs_info->qgroup_flags);
|
|
btrfs_set_qgroup_status_rescan(leaf, ptr, 0);
|
|
|
|
btrfs_mark_buffer_dirty(leaf);
|
|
|
|
key.objectid = 0;
|
|
key.type = BTRFS_ROOT_REF_KEY;
|
|
key.offset = 0;
|
|
|
|
btrfs_release_path(path);
|
|
ret = btrfs_search_slot_for_read(tree_root, &key, path, 1, 0);
|
|
if (ret > 0)
|
|
goto out_add_root;
|
|
if (ret < 0)
|
|
goto out_free_path;
|
|
|
|
|
|
while (1) {
|
|
slot = path->slots[0];
|
|
leaf = path->nodes[0];
|
|
btrfs_item_key_to_cpu(leaf, &found_key, slot);
|
|
|
|
if (found_key.type == BTRFS_ROOT_REF_KEY) {
|
|
ret = add_qgroup_item(trans, quota_root,
|
|
found_key.offset);
|
|
if (ret)
|
|
goto out_free_path;
|
|
|
|
qgroup = add_qgroup_rb(fs_info, found_key.offset);
|
|
if (IS_ERR(qgroup)) {
|
|
ret = PTR_ERR(qgroup);
|
|
goto out_free_path;
|
|
}
|
|
}
|
|
ret = btrfs_next_item(tree_root, path);
|
|
if (ret < 0)
|
|
goto out_free_path;
|
|
if (ret)
|
|
break;
|
|
}
|
|
|
|
out_add_root:
|
|
btrfs_release_path(path);
|
|
ret = add_qgroup_item(trans, quota_root, BTRFS_FS_TREE_OBJECTID);
|
|
if (ret)
|
|
goto out_free_path;
|
|
|
|
qgroup = add_qgroup_rb(fs_info, BTRFS_FS_TREE_OBJECTID);
|
|
if (IS_ERR(qgroup)) {
|
|
ret = PTR_ERR(qgroup);
|
|
goto out_free_path;
|
|
}
|
|
spin_lock(&fs_info->qgroup_lock);
|
|
fs_info->quota_root = quota_root;
|
|
fs_info->pending_quota_state = 1;
|
|
spin_unlock(&fs_info->qgroup_lock);
|
|
out_free_path:
|
|
btrfs_free_path(path);
|
|
out_free_root:
|
|
if (ret) {
|
|
free_extent_buffer(quota_root->node);
|
|
free_extent_buffer(quota_root->commit_root);
|
|
kfree(quota_root);
|
|
}
|
|
out:
|
|
if (ret) {
|
|
ulist_free(fs_info->qgroup_ulist);
|
|
fs_info->qgroup_ulist = NULL;
|
|
}
|
|
mutex_unlock(&fs_info->qgroup_ioctl_lock);
|
|
return ret;
|
|
}
|
|
|
|
int btrfs_quota_disable(struct btrfs_trans_handle *trans,
|
|
struct btrfs_fs_info *fs_info)
|
|
{
|
|
struct btrfs_root *tree_root = fs_info->tree_root;
|
|
struct btrfs_root *quota_root;
|
|
int ret = 0;
|
|
|
|
mutex_lock(&fs_info->qgroup_ioctl_lock);
|
|
if (!fs_info->quota_root)
|
|
goto out;
|
|
spin_lock(&fs_info->qgroup_lock);
|
|
fs_info->quota_enabled = 0;
|
|
fs_info->pending_quota_state = 0;
|
|
quota_root = fs_info->quota_root;
|
|
fs_info->quota_root = NULL;
|
|
fs_info->qgroup_flags &= ~BTRFS_QGROUP_STATUS_FLAG_ON;
|
|
spin_unlock(&fs_info->qgroup_lock);
|
|
|
|
btrfs_free_qgroup_config(fs_info);
|
|
|
|
ret = btrfs_clean_quota_tree(trans, quota_root);
|
|
if (ret)
|
|
goto out;
|
|
|
|
ret = btrfs_del_root(trans, tree_root, "a_root->root_key);
|
|
if (ret)
|
|
goto out;
|
|
|
|
list_del("a_root->dirty_list);
|
|
|
|
btrfs_tree_lock(quota_root->node);
|
|
clean_tree_block(trans, tree_root->fs_info, quota_root->node);
|
|
btrfs_tree_unlock(quota_root->node);
|
|
btrfs_free_tree_block(trans, quota_root, quota_root->node, 0, 1);
|
|
|
|
free_extent_buffer(quota_root->node);
|
|
free_extent_buffer(quota_root->commit_root);
|
|
kfree(quota_root);
|
|
out:
|
|
mutex_unlock(&fs_info->qgroup_ioctl_lock);
|
|
return ret;
|
|
}
|
|
|
|
static void qgroup_dirty(struct btrfs_fs_info *fs_info,
|
|
struct btrfs_qgroup *qgroup)
|
|
{
|
|
if (list_empty(&qgroup->dirty))
|
|
list_add(&qgroup->dirty, &fs_info->dirty_qgroups);
|
|
}
|
|
|
|
/*
|
|
* The easy accounting, if we are adding/removing the only ref for an extent
|
|
* then this qgroup and all of the parent qgroups get their refrence and
|
|
* exclusive counts adjusted.
|
|
*
|
|
* Caller should hold fs_info->qgroup_lock.
|
|
*/
|
|
static int __qgroup_excl_accounting(struct btrfs_fs_info *fs_info,
|
|
struct ulist *tmp, u64 ref_root,
|
|
u64 num_bytes, int sign)
|
|
{
|
|
struct btrfs_qgroup *qgroup;
|
|
struct btrfs_qgroup_list *glist;
|
|
struct ulist_node *unode;
|
|
struct ulist_iterator uiter;
|
|
int ret = 0;
|
|
|
|
qgroup = find_qgroup_rb(fs_info, ref_root);
|
|
if (!qgroup)
|
|
goto out;
|
|
|
|
qgroup->rfer += sign * num_bytes;
|
|
qgroup->rfer_cmpr += sign * num_bytes;
|
|
|
|
WARN_ON(sign < 0 && qgroup->excl < num_bytes);
|
|
qgroup->excl += sign * num_bytes;
|
|
qgroup->excl_cmpr += sign * num_bytes;
|
|
if (sign > 0)
|
|
qgroup->reserved -= num_bytes;
|
|
|
|
qgroup_dirty(fs_info, qgroup);
|
|
|
|
/* Get all of the parent groups that contain this qgroup */
|
|
list_for_each_entry(glist, &qgroup->groups, next_group) {
|
|
ret = ulist_add(tmp, glist->group->qgroupid,
|
|
ptr_to_u64(glist->group), GFP_ATOMIC);
|
|
if (ret < 0)
|
|
goto out;
|
|
}
|
|
|
|
/* Iterate all of the parents and adjust their reference counts */
|
|
ULIST_ITER_INIT(&uiter);
|
|
while ((unode = ulist_next(tmp, &uiter))) {
|
|
qgroup = u64_to_ptr(unode->aux);
|
|
qgroup->rfer += sign * num_bytes;
|
|
qgroup->rfer_cmpr += sign * num_bytes;
|
|
WARN_ON(sign < 0 && qgroup->excl < num_bytes);
|
|
qgroup->excl += sign * num_bytes;
|
|
if (sign > 0)
|
|
qgroup->reserved -= num_bytes;
|
|
qgroup->excl_cmpr += sign * num_bytes;
|
|
qgroup_dirty(fs_info, qgroup);
|
|
|
|
/* Add any parents of the parents */
|
|
list_for_each_entry(glist, &qgroup->groups, next_group) {
|
|
ret = ulist_add(tmp, glist->group->qgroupid,
|
|
ptr_to_u64(glist->group), GFP_ATOMIC);
|
|
if (ret < 0)
|
|
goto out;
|
|
}
|
|
}
|
|
ret = 0;
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
|
|
/*
|
|
* Quick path for updating qgroup with only excl refs.
|
|
*
|
|
* In that case, just update all parent will be enough.
|
|
* Or we needs to do a full rescan.
|
|
* Caller should also hold fs_info->qgroup_lock.
|
|
*
|
|
* Return 0 for quick update, return >0 for need to full rescan
|
|
* and mark INCONSISTENT flag.
|
|
* Return < 0 for other error.
|
|
*/
|
|
static int quick_update_accounting(struct btrfs_fs_info *fs_info,
|
|
struct ulist *tmp, u64 src, u64 dst,
|
|
int sign)
|
|
{
|
|
struct btrfs_qgroup *qgroup;
|
|
int ret = 1;
|
|
int err = 0;
|
|
|
|
qgroup = find_qgroup_rb(fs_info, src);
|
|
if (!qgroup)
|
|
goto out;
|
|
if (qgroup->excl == qgroup->rfer) {
|
|
ret = 0;
|
|
err = __qgroup_excl_accounting(fs_info, tmp, dst,
|
|
qgroup->excl, sign);
|
|
if (err < 0) {
|
|
ret = err;
|
|
goto out;
|
|
}
|
|
}
|
|
out:
|
|
if (ret)
|
|
fs_info->qgroup_flags |= BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT;
|
|
return ret;
|
|
}
|
|
|
|
int btrfs_add_qgroup_relation(struct btrfs_trans_handle *trans,
|
|
struct btrfs_fs_info *fs_info, u64 src, u64 dst)
|
|
{
|
|
struct btrfs_root *quota_root;
|
|
struct btrfs_qgroup *parent;
|
|
struct btrfs_qgroup *member;
|
|
struct btrfs_qgroup_list *list;
|
|
struct ulist *tmp;
|
|
int ret = 0;
|
|
|
|
/* Check the level of src and dst first */
|
|
if (btrfs_qgroup_level(src) >= btrfs_qgroup_level(dst))
|
|
return -EINVAL;
|
|
|
|
tmp = ulist_alloc(GFP_NOFS);
|
|
if (!tmp)
|
|
return -ENOMEM;
|
|
|
|
mutex_lock(&fs_info->qgroup_ioctl_lock);
|
|
quota_root = fs_info->quota_root;
|
|
if (!quota_root) {
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
member = find_qgroup_rb(fs_info, src);
|
|
parent = find_qgroup_rb(fs_info, dst);
|
|
if (!member || !parent) {
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
/* check if such qgroup relation exist firstly */
|
|
list_for_each_entry(list, &member->groups, next_group) {
|
|
if (list->group == parent) {
|
|
ret = -EEXIST;
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
ret = add_qgroup_relation_item(trans, quota_root, src, dst);
|
|
if (ret)
|
|
goto out;
|
|
|
|
ret = add_qgroup_relation_item(trans, quota_root, dst, src);
|
|
if (ret) {
|
|
del_qgroup_relation_item(trans, quota_root, src, dst);
|
|
goto out;
|
|
}
|
|
|
|
spin_lock(&fs_info->qgroup_lock);
|
|
ret = add_relation_rb(quota_root->fs_info, src, dst);
|
|
if (ret < 0) {
|
|
spin_unlock(&fs_info->qgroup_lock);
|
|
goto out;
|
|
}
|
|
ret = quick_update_accounting(fs_info, tmp, src, dst, 1);
|
|
spin_unlock(&fs_info->qgroup_lock);
|
|
out:
|
|
mutex_unlock(&fs_info->qgroup_ioctl_lock);
|
|
ulist_free(tmp);
|
|
return ret;
|
|
}
|
|
|
|
int __del_qgroup_relation(struct btrfs_trans_handle *trans,
|
|
struct btrfs_fs_info *fs_info, u64 src, u64 dst)
|
|
{
|
|
struct btrfs_root *quota_root;
|
|
struct btrfs_qgroup *parent;
|
|
struct btrfs_qgroup *member;
|
|
struct btrfs_qgroup_list *list;
|
|
struct ulist *tmp;
|
|
int ret = 0;
|
|
int err;
|
|
|
|
tmp = ulist_alloc(GFP_NOFS);
|
|
if (!tmp)
|
|
return -ENOMEM;
|
|
|
|
quota_root = fs_info->quota_root;
|
|
if (!quota_root) {
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
member = find_qgroup_rb(fs_info, src);
|
|
parent = find_qgroup_rb(fs_info, dst);
|
|
if (!member || !parent) {
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
/* check if such qgroup relation exist firstly */
|
|
list_for_each_entry(list, &member->groups, next_group) {
|
|
if (list->group == parent)
|
|
goto exist;
|
|
}
|
|
ret = -ENOENT;
|
|
goto out;
|
|
exist:
|
|
ret = del_qgroup_relation_item(trans, quota_root, src, dst);
|
|
err = del_qgroup_relation_item(trans, quota_root, dst, src);
|
|
if (err && !ret)
|
|
ret = err;
|
|
|
|
spin_lock(&fs_info->qgroup_lock);
|
|
del_relation_rb(fs_info, src, dst);
|
|
ret = quick_update_accounting(fs_info, tmp, src, dst, -1);
|
|
spin_unlock(&fs_info->qgroup_lock);
|
|
out:
|
|
ulist_free(tmp);
|
|
return ret;
|
|
}
|
|
|
|
int btrfs_del_qgroup_relation(struct btrfs_trans_handle *trans,
|
|
struct btrfs_fs_info *fs_info, u64 src, u64 dst)
|
|
{
|
|
int ret = 0;
|
|
|
|
mutex_lock(&fs_info->qgroup_ioctl_lock);
|
|
ret = __del_qgroup_relation(trans, fs_info, src, dst);
|
|
mutex_unlock(&fs_info->qgroup_ioctl_lock);
|
|
|
|
return ret;
|
|
}
|
|
|
|
int btrfs_create_qgroup(struct btrfs_trans_handle *trans,
|
|
struct btrfs_fs_info *fs_info, u64 qgroupid)
|
|
{
|
|
struct btrfs_root *quota_root;
|
|
struct btrfs_qgroup *qgroup;
|
|
int ret = 0;
|
|
|
|
mutex_lock(&fs_info->qgroup_ioctl_lock);
|
|
quota_root = fs_info->quota_root;
|
|
if (!quota_root) {
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
qgroup = find_qgroup_rb(fs_info, qgroupid);
|
|
if (qgroup) {
|
|
ret = -EEXIST;
|
|
goto out;
|
|
}
|
|
|
|
ret = add_qgroup_item(trans, quota_root, qgroupid);
|
|
if (ret)
|
|
goto out;
|
|
|
|
spin_lock(&fs_info->qgroup_lock);
|
|
qgroup = add_qgroup_rb(fs_info, qgroupid);
|
|
spin_unlock(&fs_info->qgroup_lock);
|
|
|
|
if (IS_ERR(qgroup))
|
|
ret = PTR_ERR(qgroup);
|
|
out:
|
|
mutex_unlock(&fs_info->qgroup_ioctl_lock);
|
|
return ret;
|
|
}
|
|
|
|
int btrfs_remove_qgroup(struct btrfs_trans_handle *trans,
|
|
struct btrfs_fs_info *fs_info, u64 qgroupid)
|
|
{
|
|
struct btrfs_root *quota_root;
|
|
struct btrfs_qgroup *qgroup;
|
|
struct btrfs_qgroup_list *list;
|
|
int ret = 0;
|
|
|
|
mutex_lock(&fs_info->qgroup_ioctl_lock);
|
|
quota_root = fs_info->quota_root;
|
|
if (!quota_root) {
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
qgroup = find_qgroup_rb(fs_info, qgroupid);
|
|
if (!qgroup) {
|
|
ret = -ENOENT;
|
|
goto out;
|
|
} else {
|
|
/* check if there are no children of this qgroup */
|
|
if (!list_empty(&qgroup->members)) {
|
|
ret = -EBUSY;
|
|
goto out;
|
|
}
|
|
}
|
|
ret = del_qgroup_item(trans, quota_root, qgroupid);
|
|
|
|
while (!list_empty(&qgroup->groups)) {
|
|
list = list_first_entry(&qgroup->groups,
|
|
struct btrfs_qgroup_list, next_group);
|
|
ret = __del_qgroup_relation(trans, fs_info,
|
|
qgroupid,
|
|
list->group->qgroupid);
|
|
if (ret)
|
|
goto out;
|
|
}
|
|
|
|
spin_lock(&fs_info->qgroup_lock);
|
|
del_qgroup_rb(quota_root->fs_info, qgroupid);
|
|
spin_unlock(&fs_info->qgroup_lock);
|
|
out:
|
|
mutex_unlock(&fs_info->qgroup_ioctl_lock);
|
|
return ret;
|
|
}
|
|
|
|
int btrfs_limit_qgroup(struct btrfs_trans_handle *trans,
|
|
struct btrfs_fs_info *fs_info, u64 qgroupid,
|
|
struct btrfs_qgroup_limit *limit)
|
|
{
|
|
struct btrfs_root *quota_root;
|
|
struct btrfs_qgroup *qgroup;
|
|
int ret = 0;
|
|
|
|
mutex_lock(&fs_info->qgroup_ioctl_lock);
|
|
quota_root = fs_info->quota_root;
|
|
if (!quota_root) {
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
qgroup = find_qgroup_rb(fs_info, qgroupid);
|
|
if (!qgroup) {
|
|
ret = -ENOENT;
|
|
goto out;
|
|
}
|
|
|
|
spin_lock(&fs_info->qgroup_lock);
|
|
if (limit->flags & BTRFS_QGROUP_LIMIT_MAX_RFER)
|
|
qgroup->max_rfer = limit->max_rfer;
|
|
if (limit->flags & BTRFS_QGROUP_LIMIT_MAX_EXCL)
|
|
qgroup->max_excl = limit->max_excl;
|
|
if (limit->flags & BTRFS_QGROUP_LIMIT_RSV_RFER)
|
|
qgroup->rsv_rfer = limit->rsv_rfer;
|
|
if (limit->flags & BTRFS_QGROUP_LIMIT_RSV_EXCL)
|
|
qgroup->rsv_excl = limit->rsv_excl;
|
|
qgroup->lim_flags |= limit->flags;
|
|
|
|
spin_unlock(&fs_info->qgroup_lock);
|
|
|
|
ret = update_qgroup_limit_item(trans, quota_root, qgroup);
|
|
if (ret) {
|
|
fs_info->qgroup_flags |= BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT;
|
|
btrfs_info(fs_info, "unable to update quota limit for %llu",
|
|
qgroupid);
|
|
}
|
|
|
|
out:
|
|
mutex_unlock(&fs_info->qgroup_ioctl_lock);
|
|
return ret;
|
|
}
|
|
|
|
int btrfs_qgroup_prepare_account_extents(struct btrfs_trans_handle *trans,
|
|
struct btrfs_fs_info *fs_info)
|
|
{
|
|
struct btrfs_qgroup_extent_record *record;
|
|
struct btrfs_delayed_ref_root *delayed_refs;
|
|
struct rb_node *node;
|
|
u64 qgroup_to_skip;
|
|
int ret = 0;
|
|
|
|
delayed_refs = &trans->transaction->delayed_refs;
|
|
qgroup_to_skip = delayed_refs->qgroup_to_skip;
|
|
|
|
/*
|
|
* No need to do lock, since this function will only be called in
|
|
* btrfs_commmit_transaction().
|
|
*/
|
|
node = rb_first(&delayed_refs->dirty_extent_root);
|
|
while (node) {
|
|
record = rb_entry(node, struct btrfs_qgroup_extent_record,
|
|
node);
|
|
ret = btrfs_find_all_roots(NULL, fs_info, record->bytenr, 0,
|
|
&record->old_roots);
|
|
if (ret < 0)
|
|
break;
|
|
if (qgroup_to_skip)
|
|
ulist_del(record->old_roots, qgroup_to_skip, 0);
|
|
node = rb_next(node);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
struct btrfs_qgroup_extent_record
|
|
*btrfs_qgroup_insert_dirty_extent(struct btrfs_delayed_ref_root *delayed_refs,
|
|
struct btrfs_qgroup_extent_record *record)
|
|
{
|
|
struct rb_node **p = &delayed_refs->dirty_extent_root.rb_node;
|
|
struct rb_node *parent_node = NULL;
|
|
struct btrfs_qgroup_extent_record *entry;
|
|
u64 bytenr = record->bytenr;
|
|
|
|
while (*p) {
|
|
parent_node = *p;
|
|
entry = rb_entry(parent_node, struct btrfs_qgroup_extent_record,
|
|
node);
|
|
if (bytenr < entry->bytenr)
|
|
p = &(*p)->rb_left;
|
|
else if (bytenr > entry->bytenr)
|
|
p = &(*p)->rb_right;
|
|
else
|
|
return entry;
|
|
}
|
|
|
|
rb_link_node(&record->node, parent_node, p);
|
|
rb_insert_color(&record->node, &delayed_refs->dirty_extent_root);
|
|
return NULL;
|
|
}
|
|
|
|
#define UPDATE_NEW 0
|
|
#define UPDATE_OLD 1
|
|
/*
|
|
* Walk all of the roots that points to the bytenr and adjust their refcnts.
|
|
*/
|
|
static int qgroup_update_refcnt(struct btrfs_fs_info *fs_info,
|
|
struct ulist *roots, struct ulist *tmp,
|
|
struct ulist *qgroups, u64 seq, int update_old)
|
|
{
|
|
struct ulist_node *unode;
|
|
struct ulist_iterator uiter;
|
|
struct ulist_node *tmp_unode;
|
|
struct ulist_iterator tmp_uiter;
|
|
struct btrfs_qgroup *qg;
|
|
int ret = 0;
|
|
|
|
if (!roots)
|
|
return 0;
|
|
ULIST_ITER_INIT(&uiter);
|
|
while ((unode = ulist_next(roots, &uiter))) {
|
|
qg = find_qgroup_rb(fs_info, unode->val);
|
|
if (!qg)
|
|
continue;
|
|
|
|
ulist_reinit(tmp);
|
|
ret = ulist_add(qgroups, qg->qgroupid, ptr_to_u64(qg),
|
|
GFP_ATOMIC);
|
|
if (ret < 0)
|
|
return ret;
|
|
ret = ulist_add(tmp, qg->qgroupid, ptr_to_u64(qg), GFP_ATOMIC);
|
|
if (ret < 0)
|
|
return ret;
|
|
ULIST_ITER_INIT(&tmp_uiter);
|
|
while ((tmp_unode = ulist_next(tmp, &tmp_uiter))) {
|
|
struct btrfs_qgroup_list *glist;
|
|
|
|
qg = u64_to_ptr(tmp_unode->aux);
|
|
if (update_old)
|
|
btrfs_qgroup_update_old_refcnt(qg, seq, 1);
|
|
else
|
|
btrfs_qgroup_update_new_refcnt(qg, seq, 1);
|
|
list_for_each_entry(glist, &qg->groups, next_group) {
|
|
ret = ulist_add(qgroups, glist->group->qgroupid,
|
|
ptr_to_u64(glist->group),
|
|
GFP_ATOMIC);
|
|
if (ret < 0)
|
|
return ret;
|
|
ret = ulist_add(tmp, glist->group->qgroupid,
|
|
ptr_to_u64(glist->group),
|
|
GFP_ATOMIC);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Update qgroup rfer/excl counters.
|
|
* Rfer update is easy, codes can explain themselves.
|
|
*
|
|
* Excl update is tricky, the update is split into 2 part.
|
|
* Part 1: Possible exclusive <-> sharing detect:
|
|
* | A | !A |
|
|
* -------------------------------------
|
|
* B | * | - |
|
|
* -------------------------------------
|
|
* !B | + | ** |
|
|
* -------------------------------------
|
|
*
|
|
* Conditions:
|
|
* A: cur_old_roots < nr_old_roots (not exclusive before)
|
|
* !A: cur_old_roots == nr_old_roots (possible exclusive before)
|
|
* B: cur_new_roots < nr_new_roots (not exclusive now)
|
|
* !B: cur_new_roots == nr_new_roots (possible exclsuive now)
|
|
*
|
|
* Results:
|
|
* +: Possible sharing -> exclusive -: Possible exclusive -> sharing
|
|
* *: Definitely not changed. **: Possible unchanged.
|
|
*
|
|
* For !A and !B condition, the exception is cur_old/new_roots == 0 case.
|
|
*
|
|
* To make the logic clear, we first use condition A and B to split
|
|
* combination into 4 results.
|
|
*
|
|
* Then, for result "+" and "-", check old/new_roots == 0 case, as in them
|
|
* only on variant maybe 0.
|
|
*
|
|
* Lastly, check result **, since there are 2 variants maybe 0, split them
|
|
* again(2x2).
|
|
* But this time we don't need to consider other things, the codes and logic
|
|
* is easy to understand now.
|
|
*/
|
|
static int qgroup_update_counters(struct btrfs_fs_info *fs_info,
|
|
struct ulist *qgroups,
|
|
u64 nr_old_roots,
|
|
u64 nr_new_roots,
|
|
u64 num_bytes, u64 seq)
|
|
{
|
|
struct ulist_node *unode;
|
|
struct ulist_iterator uiter;
|
|
struct btrfs_qgroup *qg;
|
|
u64 cur_new_count, cur_old_count;
|
|
|
|
ULIST_ITER_INIT(&uiter);
|
|
while ((unode = ulist_next(qgroups, &uiter))) {
|
|
bool dirty = false;
|
|
|
|
qg = u64_to_ptr(unode->aux);
|
|
cur_old_count = btrfs_qgroup_get_old_refcnt(qg, seq);
|
|
cur_new_count = btrfs_qgroup_get_new_refcnt(qg, seq);
|
|
|
|
/* Rfer update part */
|
|
if (cur_old_count == 0 && cur_new_count > 0) {
|
|
qg->rfer += num_bytes;
|
|
qg->rfer_cmpr += num_bytes;
|
|
dirty = true;
|
|
}
|
|
if (cur_old_count > 0 && cur_new_count == 0) {
|
|
qg->rfer -= num_bytes;
|
|
qg->rfer_cmpr -= num_bytes;
|
|
dirty = true;
|
|
}
|
|
|
|
/* Excl update part */
|
|
/* Exclusive/none -> shared case */
|
|
if (cur_old_count == nr_old_roots &&
|
|
cur_new_count < nr_new_roots) {
|
|
/* Exclusive -> shared */
|
|
if (cur_old_count != 0) {
|
|
qg->excl -= num_bytes;
|
|
qg->excl_cmpr -= num_bytes;
|
|
dirty = true;
|
|
}
|
|
}
|
|
|
|
/* Shared -> exclusive/none case */
|
|
if (cur_old_count < nr_old_roots &&
|
|
cur_new_count == nr_new_roots) {
|
|
/* Shared->exclusive */
|
|
if (cur_new_count != 0) {
|
|
qg->excl += num_bytes;
|
|
qg->excl_cmpr += num_bytes;
|
|
dirty = true;
|
|
}
|
|
}
|
|
|
|
/* Exclusive/none -> exclusive/none case */
|
|
if (cur_old_count == nr_old_roots &&
|
|
cur_new_count == nr_new_roots) {
|
|
if (cur_old_count == 0) {
|
|
/* None -> exclusive/none */
|
|
|
|
if (cur_new_count != 0) {
|
|
/* None -> exclusive */
|
|
qg->excl += num_bytes;
|
|
qg->excl_cmpr += num_bytes;
|
|
dirty = true;
|
|
}
|
|
/* None -> none, nothing changed */
|
|
} else {
|
|
/* Exclusive -> exclusive/none */
|
|
|
|
if (cur_new_count == 0) {
|
|
/* Exclusive -> none */
|
|
qg->excl -= num_bytes;
|
|
qg->excl_cmpr -= num_bytes;
|
|
dirty = true;
|
|
}
|
|
/* Exclusive -> exclusive, nothing changed */
|
|
}
|
|
}
|
|
if (dirty)
|
|
qgroup_dirty(fs_info, qg);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
btrfs_qgroup_account_extent(struct btrfs_trans_handle *trans,
|
|
struct btrfs_fs_info *fs_info,
|
|
u64 bytenr, u64 num_bytes,
|
|
struct ulist *old_roots, struct ulist *new_roots)
|
|
{
|
|
struct ulist *qgroups = NULL;
|
|
struct ulist *tmp = NULL;
|
|
u64 seq;
|
|
u64 nr_new_roots = 0;
|
|
u64 nr_old_roots = 0;
|
|
int ret = 0;
|
|
|
|
if (new_roots)
|
|
nr_new_roots = new_roots->nnodes;
|
|
if (old_roots)
|
|
nr_old_roots = old_roots->nnodes;
|
|
|
|
if (!fs_info->quota_enabled)
|
|
goto out_free;
|
|
BUG_ON(!fs_info->quota_root);
|
|
|
|
qgroups = ulist_alloc(GFP_NOFS);
|
|
if (!qgroups) {
|
|
ret = -ENOMEM;
|
|
goto out_free;
|
|
}
|
|
tmp = ulist_alloc(GFP_NOFS);
|
|
if (!tmp) {
|
|
ret = -ENOMEM;
|
|
goto out_free;
|
|
}
|
|
|
|
mutex_lock(&fs_info->qgroup_rescan_lock);
|
|
if (fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_RESCAN) {
|
|
if (fs_info->qgroup_rescan_progress.objectid <= bytenr) {
|
|
mutex_unlock(&fs_info->qgroup_rescan_lock);
|
|
ret = 0;
|
|
goto out_free;
|
|
}
|
|
}
|
|
mutex_unlock(&fs_info->qgroup_rescan_lock);
|
|
|
|
spin_lock(&fs_info->qgroup_lock);
|
|
seq = fs_info->qgroup_seq;
|
|
|
|
/* Update old refcnts using old_roots */
|
|
ret = qgroup_update_refcnt(fs_info, old_roots, tmp, qgroups, seq,
|
|
UPDATE_OLD);
|
|
if (ret < 0)
|
|
goto out;
|
|
|
|
/* Update new refcnts using new_roots */
|
|
ret = qgroup_update_refcnt(fs_info, new_roots, tmp, qgroups, seq,
|
|
UPDATE_NEW);
|
|
if (ret < 0)
|
|
goto out;
|
|
|
|
qgroup_update_counters(fs_info, qgroups, nr_old_roots, nr_new_roots,
|
|
num_bytes, seq);
|
|
|
|
/*
|
|
* Bump qgroup_seq to avoid seq overlap
|
|
*/
|
|
fs_info->qgroup_seq += max(nr_old_roots, nr_new_roots) + 1;
|
|
out:
|
|
spin_unlock(&fs_info->qgroup_lock);
|
|
out_free:
|
|
ulist_free(tmp);
|
|
ulist_free(qgroups);
|
|
ulist_free(old_roots);
|
|
ulist_free(new_roots);
|
|
return ret;
|
|
}
|
|
|
|
int btrfs_qgroup_account_extents(struct btrfs_trans_handle *trans,
|
|
struct btrfs_fs_info *fs_info)
|
|
{
|
|
struct btrfs_qgroup_extent_record *record;
|
|
struct btrfs_delayed_ref_root *delayed_refs;
|
|
struct ulist *new_roots = NULL;
|
|
struct rb_node *node;
|
|
u64 qgroup_to_skip;
|
|
int ret = 0;
|
|
|
|
delayed_refs = &trans->transaction->delayed_refs;
|
|
qgroup_to_skip = delayed_refs->qgroup_to_skip;
|
|
while ((node = rb_first(&delayed_refs->dirty_extent_root))) {
|
|
record = rb_entry(node, struct btrfs_qgroup_extent_record,
|
|
node);
|
|
|
|
if (!ret) {
|
|
/*
|
|
* Use (u64)-1 as time_seq to do special search, which
|
|
* doesn't lock tree or delayed_refs and search current
|
|
* root. It's safe inside commit_transaction().
|
|
*/
|
|
ret = btrfs_find_all_roots(trans, fs_info,
|
|
record->bytenr, (u64)-1, &new_roots);
|
|
if (ret < 0)
|
|
goto cleanup;
|
|
if (qgroup_to_skip)
|
|
ulist_del(new_roots, qgroup_to_skip, 0);
|
|
ret = btrfs_qgroup_account_extent(trans, fs_info,
|
|
record->bytenr, record->num_bytes,
|
|
record->old_roots, new_roots);
|
|
record->old_roots = NULL;
|
|
new_roots = NULL;
|
|
}
|
|
cleanup:
|
|
ulist_free(record->old_roots);
|
|
ulist_free(new_roots);
|
|
new_roots = NULL;
|
|
rb_erase(node, &delayed_refs->dirty_extent_root);
|
|
kfree(record);
|
|
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* called from commit_transaction. Writes all changed qgroups to disk.
|
|
*/
|
|
int btrfs_run_qgroups(struct btrfs_trans_handle *trans,
|
|
struct btrfs_fs_info *fs_info)
|
|
{
|
|
struct btrfs_root *quota_root = fs_info->quota_root;
|
|
int ret = 0;
|
|
int start_rescan_worker = 0;
|
|
|
|
if (!quota_root)
|
|
goto out;
|
|
|
|
if (!fs_info->quota_enabled && fs_info->pending_quota_state)
|
|
start_rescan_worker = 1;
|
|
|
|
fs_info->quota_enabled = fs_info->pending_quota_state;
|
|
|
|
spin_lock(&fs_info->qgroup_lock);
|
|
while (!list_empty(&fs_info->dirty_qgroups)) {
|
|
struct btrfs_qgroup *qgroup;
|
|
qgroup = list_first_entry(&fs_info->dirty_qgroups,
|
|
struct btrfs_qgroup, dirty);
|
|
list_del_init(&qgroup->dirty);
|
|
spin_unlock(&fs_info->qgroup_lock);
|
|
ret = update_qgroup_info_item(trans, quota_root, qgroup);
|
|
if (ret)
|
|
fs_info->qgroup_flags |=
|
|
BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT;
|
|
ret = update_qgroup_limit_item(trans, quota_root, qgroup);
|
|
if (ret)
|
|
fs_info->qgroup_flags |=
|
|
BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT;
|
|
spin_lock(&fs_info->qgroup_lock);
|
|
}
|
|
if (fs_info->quota_enabled)
|
|
fs_info->qgroup_flags |= BTRFS_QGROUP_STATUS_FLAG_ON;
|
|
else
|
|
fs_info->qgroup_flags &= ~BTRFS_QGROUP_STATUS_FLAG_ON;
|
|
spin_unlock(&fs_info->qgroup_lock);
|
|
|
|
ret = update_qgroup_status_item(trans, fs_info, quota_root);
|
|
if (ret)
|
|
fs_info->qgroup_flags |= BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT;
|
|
|
|
if (!ret && start_rescan_worker) {
|
|
ret = qgroup_rescan_init(fs_info, 0, 1);
|
|
if (!ret) {
|
|
qgroup_rescan_zero_tracking(fs_info);
|
|
btrfs_queue_work(fs_info->qgroup_rescan_workers,
|
|
&fs_info->qgroup_rescan_work);
|
|
}
|
|
ret = 0;
|
|
}
|
|
|
|
out:
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* copy the acounting information between qgroups. This is necessary when a
|
|
* snapshot or a subvolume is created
|
|
*/
|
|
int btrfs_qgroup_inherit(struct btrfs_trans_handle *trans,
|
|
struct btrfs_fs_info *fs_info, u64 srcid, u64 objectid,
|
|
struct btrfs_qgroup_inherit *inherit)
|
|
{
|
|
int ret = 0;
|
|
int i;
|
|
u64 *i_qgroups;
|
|
struct btrfs_root *quota_root = fs_info->quota_root;
|
|
struct btrfs_qgroup *srcgroup;
|
|
struct btrfs_qgroup *dstgroup;
|
|
u32 level_size = 0;
|
|
u64 nums;
|
|
|
|
mutex_lock(&fs_info->qgroup_ioctl_lock);
|
|
if (!fs_info->quota_enabled)
|
|
goto out;
|
|
|
|
if (!quota_root) {
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
if (inherit) {
|
|
i_qgroups = (u64 *)(inherit + 1);
|
|
nums = inherit->num_qgroups + 2 * inherit->num_ref_copies +
|
|
2 * inherit->num_excl_copies;
|
|
for (i = 0; i < nums; ++i) {
|
|
srcgroup = find_qgroup_rb(fs_info, *i_qgroups);
|
|
if (!srcgroup) {
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
if ((srcgroup->qgroupid >> 48) <= (objectid >> 48)) {
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
++i_qgroups;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* create a tracking group for the subvol itself
|
|
*/
|
|
ret = add_qgroup_item(trans, quota_root, objectid);
|
|
if (ret)
|
|
goto out;
|
|
|
|
if (srcid) {
|
|
struct btrfs_root *srcroot;
|
|
struct btrfs_key srckey;
|
|
|
|
srckey.objectid = srcid;
|
|
srckey.type = BTRFS_ROOT_ITEM_KEY;
|
|
srckey.offset = (u64)-1;
|
|
srcroot = btrfs_read_fs_root_no_name(fs_info, &srckey);
|
|
if (IS_ERR(srcroot)) {
|
|
ret = PTR_ERR(srcroot);
|
|
goto out;
|
|
}
|
|
|
|
rcu_read_lock();
|
|
level_size = srcroot->nodesize;
|
|
rcu_read_unlock();
|
|
}
|
|
|
|
/*
|
|
* add qgroup to all inherited groups
|
|
*/
|
|
if (inherit) {
|
|
i_qgroups = (u64 *)(inherit + 1);
|
|
for (i = 0; i < inherit->num_qgroups; ++i) {
|
|
ret = add_qgroup_relation_item(trans, quota_root,
|
|
objectid, *i_qgroups);
|
|
if (ret)
|
|
goto out;
|
|
ret = add_qgroup_relation_item(trans, quota_root,
|
|
*i_qgroups, objectid);
|
|
if (ret)
|
|
goto out;
|
|
++i_qgroups;
|
|
}
|
|
}
|
|
|
|
|
|
spin_lock(&fs_info->qgroup_lock);
|
|
|
|
dstgroup = add_qgroup_rb(fs_info, objectid);
|
|
if (IS_ERR(dstgroup)) {
|
|
ret = PTR_ERR(dstgroup);
|
|
goto unlock;
|
|
}
|
|
|
|
if (inherit && inherit->flags & BTRFS_QGROUP_INHERIT_SET_LIMITS) {
|
|
dstgroup->lim_flags = inherit->lim.flags;
|
|
dstgroup->max_rfer = inherit->lim.max_rfer;
|
|
dstgroup->max_excl = inherit->lim.max_excl;
|
|
dstgroup->rsv_rfer = inherit->lim.rsv_rfer;
|
|
dstgroup->rsv_excl = inherit->lim.rsv_excl;
|
|
|
|
ret = update_qgroup_limit_item(trans, quota_root, dstgroup);
|
|
if (ret) {
|
|
fs_info->qgroup_flags |= BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT;
|
|
btrfs_info(fs_info, "unable to update quota limit for %llu",
|
|
dstgroup->qgroupid);
|
|
goto unlock;
|
|
}
|
|
}
|
|
|
|
if (srcid) {
|
|
srcgroup = find_qgroup_rb(fs_info, srcid);
|
|
if (!srcgroup)
|
|
goto unlock;
|
|
|
|
/*
|
|
* We call inherit after we clone the root in order to make sure
|
|
* our counts don't go crazy, so at this point the only
|
|
* difference between the two roots should be the root node.
|
|
*/
|
|
dstgroup->rfer = srcgroup->rfer;
|
|
dstgroup->rfer_cmpr = srcgroup->rfer_cmpr;
|
|
dstgroup->excl = level_size;
|
|
dstgroup->excl_cmpr = level_size;
|
|
srcgroup->excl = level_size;
|
|
srcgroup->excl_cmpr = level_size;
|
|
|
|
/* inherit the limit info */
|
|
dstgroup->lim_flags = srcgroup->lim_flags;
|
|
dstgroup->max_rfer = srcgroup->max_rfer;
|
|
dstgroup->max_excl = srcgroup->max_excl;
|
|
dstgroup->rsv_rfer = srcgroup->rsv_rfer;
|
|
dstgroup->rsv_excl = srcgroup->rsv_excl;
|
|
|
|
qgroup_dirty(fs_info, dstgroup);
|
|
qgroup_dirty(fs_info, srcgroup);
|
|
}
|
|
|
|
if (!inherit)
|
|
goto unlock;
|
|
|
|
i_qgroups = (u64 *)(inherit + 1);
|
|
for (i = 0; i < inherit->num_qgroups; ++i) {
|
|
ret = add_relation_rb(quota_root->fs_info, objectid,
|
|
*i_qgroups);
|
|
if (ret)
|
|
goto unlock;
|
|
++i_qgroups;
|
|
}
|
|
|
|
for (i = 0; i < inherit->num_ref_copies; ++i) {
|
|
struct btrfs_qgroup *src;
|
|
struct btrfs_qgroup *dst;
|
|
|
|
src = find_qgroup_rb(fs_info, i_qgroups[0]);
|
|
dst = find_qgroup_rb(fs_info, i_qgroups[1]);
|
|
|
|
if (!src || !dst) {
|
|
ret = -EINVAL;
|
|
goto unlock;
|
|
}
|
|
|
|
dst->rfer = src->rfer - level_size;
|
|
dst->rfer_cmpr = src->rfer_cmpr - level_size;
|
|
i_qgroups += 2;
|
|
}
|
|
for (i = 0; i < inherit->num_excl_copies; ++i) {
|
|
struct btrfs_qgroup *src;
|
|
struct btrfs_qgroup *dst;
|
|
|
|
src = find_qgroup_rb(fs_info, i_qgroups[0]);
|
|
dst = find_qgroup_rb(fs_info, i_qgroups[1]);
|
|
|
|
if (!src || !dst) {
|
|
ret = -EINVAL;
|
|
goto unlock;
|
|
}
|
|
|
|
dst->excl = src->excl + level_size;
|
|
dst->excl_cmpr = src->excl_cmpr + level_size;
|
|
i_qgroups += 2;
|
|
}
|
|
|
|
unlock:
|
|
spin_unlock(&fs_info->qgroup_lock);
|
|
out:
|
|
mutex_unlock(&fs_info->qgroup_ioctl_lock);
|
|
return ret;
|
|
}
|
|
|
|
int btrfs_qgroup_reserve(struct btrfs_root *root, u64 num_bytes)
|
|
{
|
|
struct btrfs_root *quota_root;
|
|
struct btrfs_qgroup *qgroup;
|
|
struct btrfs_fs_info *fs_info = root->fs_info;
|
|
u64 ref_root = root->root_key.objectid;
|
|
int ret = 0;
|
|
struct ulist_node *unode;
|
|
struct ulist_iterator uiter;
|
|
|
|
if (!is_fstree(ref_root))
|
|
return 0;
|
|
|
|
if (num_bytes == 0)
|
|
return 0;
|
|
|
|
spin_lock(&fs_info->qgroup_lock);
|
|
quota_root = fs_info->quota_root;
|
|
if (!quota_root)
|
|
goto out;
|
|
|
|
qgroup = find_qgroup_rb(fs_info, ref_root);
|
|
if (!qgroup)
|
|
goto out;
|
|
|
|
/*
|
|
* in a first step, we check all affected qgroups if any limits would
|
|
* be exceeded
|
|
*/
|
|
ulist_reinit(fs_info->qgroup_ulist);
|
|
ret = ulist_add(fs_info->qgroup_ulist, qgroup->qgroupid,
|
|
(uintptr_t)qgroup, GFP_ATOMIC);
|
|
if (ret < 0)
|
|
goto out;
|
|
ULIST_ITER_INIT(&uiter);
|
|
while ((unode = ulist_next(fs_info->qgroup_ulist, &uiter))) {
|
|
struct btrfs_qgroup *qg;
|
|
struct btrfs_qgroup_list *glist;
|
|
|
|
qg = u64_to_ptr(unode->aux);
|
|
|
|
if ((qg->lim_flags & BTRFS_QGROUP_LIMIT_MAX_RFER) &&
|
|
qg->reserved + (s64)qg->rfer + num_bytes >
|
|
qg->max_rfer) {
|
|
ret = -EDQUOT;
|
|
goto out;
|
|
}
|
|
|
|
if ((qg->lim_flags & BTRFS_QGROUP_LIMIT_MAX_EXCL) &&
|
|
qg->reserved + (s64)qg->excl + num_bytes >
|
|
qg->max_excl) {
|
|
ret = -EDQUOT;
|
|
goto out;
|
|
}
|
|
|
|
list_for_each_entry(glist, &qg->groups, next_group) {
|
|
ret = ulist_add(fs_info->qgroup_ulist,
|
|
glist->group->qgroupid,
|
|
(uintptr_t)glist->group, GFP_ATOMIC);
|
|
if (ret < 0)
|
|
goto out;
|
|
}
|
|
}
|
|
ret = 0;
|
|
/*
|
|
* no limits exceeded, now record the reservation into all qgroups
|
|
*/
|
|
ULIST_ITER_INIT(&uiter);
|
|
while ((unode = ulist_next(fs_info->qgroup_ulist, &uiter))) {
|
|
struct btrfs_qgroup *qg;
|
|
|
|
qg = u64_to_ptr(unode->aux);
|
|
|
|
qg->reserved += num_bytes;
|
|
}
|
|
|
|
out:
|
|
spin_unlock(&fs_info->qgroup_lock);
|
|
return ret;
|
|
}
|
|
|
|
void btrfs_qgroup_free(struct btrfs_root *root, u64 num_bytes)
|
|
{
|
|
struct btrfs_root *quota_root;
|
|
struct btrfs_qgroup *qgroup;
|
|
struct btrfs_fs_info *fs_info = root->fs_info;
|
|
struct ulist_node *unode;
|
|
struct ulist_iterator uiter;
|
|
u64 ref_root = root->root_key.objectid;
|
|
int ret = 0;
|
|
|
|
if (!is_fstree(ref_root))
|
|
return;
|
|
|
|
if (num_bytes == 0)
|
|
return;
|
|
|
|
spin_lock(&fs_info->qgroup_lock);
|
|
|
|
quota_root = fs_info->quota_root;
|
|
if (!quota_root)
|
|
goto out;
|
|
|
|
qgroup = find_qgroup_rb(fs_info, ref_root);
|
|
if (!qgroup)
|
|
goto out;
|
|
|
|
ulist_reinit(fs_info->qgroup_ulist);
|
|
ret = ulist_add(fs_info->qgroup_ulist, qgroup->qgroupid,
|
|
(uintptr_t)qgroup, GFP_ATOMIC);
|
|
if (ret < 0)
|
|
goto out;
|
|
ULIST_ITER_INIT(&uiter);
|
|
while ((unode = ulist_next(fs_info->qgroup_ulist, &uiter))) {
|
|
struct btrfs_qgroup *qg;
|
|
struct btrfs_qgroup_list *glist;
|
|
|
|
qg = u64_to_ptr(unode->aux);
|
|
|
|
qg->reserved -= num_bytes;
|
|
|
|
list_for_each_entry(glist, &qg->groups, next_group) {
|
|
ret = ulist_add(fs_info->qgroup_ulist,
|
|
glist->group->qgroupid,
|
|
(uintptr_t)glist->group, GFP_ATOMIC);
|
|
if (ret < 0)
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
out:
|
|
spin_unlock(&fs_info->qgroup_lock);
|
|
}
|
|
|
|
void assert_qgroups_uptodate(struct btrfs_trans_handle *trans)
|
|
{
|
|
if (list_empty(&trans->qgroup_ref_list) && !trans->delayed_ref_elem.seq)
|
|
return;
|
|
btrfs_err(trans->root->fs_info,
|
|
"qgroups not uptodate in trans handle %p: list is%s empty, "
|
|
"seq is %#x.%x",
|
|
trans, list_empty(&trans->qgroup_ref_list) ? "" : " not",
|
|
(u32)(trans->delayed_ref_elem.seq >> 32),
|
|
(u32)trans->delayed_ref_elem.seq);
|
|
BUG();
|
|
}
|
|
|
|
/*
|
|
* returns < 0 on error, 0 when more leafs are to be scanned.
|
|
* returns 1 when done.
|
|
*/
|
|
static int
|
|
qgroup_rescan_leaf(struct btrfs_fs_info *fs_info, struct btrfs_path *path,
|
|
struct btrfs_trans_handle *trans,
|
|
struct extent_buffer *scratch_leaf)
|
|
{
|
|
struct btrfs_key found;
|
|
struct ulist *roots = NULL;
|
|
struct seq_list tree_mod_seq_elem = SEQ_LIST_INIT(tree_mod_seq_elem);
|
|
u64 num_bytes;
|
|
int slot;
|
|
int ret;
|
|
|
|
path->leave_spinning = 1;
|
|
mutex_lock(&fs_info->qgroup_rescan_lock);
|
|
ret = btrfs_search_slot_for_read(fs_info->extent_root,
|
|
&fs_info->qgroup_rescan_progress,
|
|
path, 1, 0);
|
|
|
|
pr_debug("current progress key (%llu %u %llu), search_slot ret %d\n",
|
|
fs_info->qgroup_rescan_progress.objectid,
|
|
fs_info->qgroup_rescan_progress.type,
|
|
fs_info->qgroup_rescan_progress.offset, ret);
|
|
|
|
if (ret) {
|
|
/*
|
|
* The rescan is about to end, we will not be scanning any
|
|
* further blocks. We cannot unset the RESCAN flag here, because
|
|
* we want to commit the transaction if everything went well.
|
|
* To make the live accounting work in this phase, we set our
|
|
* scan progress pointer such that every real extent objectid
|
|
* will be smaller.
|
|
*/
|
|
fs_info->qgroup_rescan_progress.objectid = (u64)-1;
|
|
btrfs_release_path(path);
|
|
mutex_unlock(&fs_info->qgroup_rescan_lock);
|
|
return ret;
|
|
}
|
|
|
|
btrfs_item_key_to_cpu(path->nodes[0], &found,
|
|
btrfs_header_nritems(path->nodes[0]) - 1);
|
|
fs_info->qgroup_rescan_progress.objectid = found.objectid + 1;
|
|
|
|
btrfs_get_tree_mod_seq(fs_info, &tree_mod_seq_elem);
|
|
memcpy(scratch_leaf, path->nodes[0], sizeof(*scratch_leaf));
|
|
slot = path->slots[0];
|
|
btrfs_release_path(path);
|
|
mutex_unlock(&fs_info->qgroup_rescan_lock);
|
|
|
|
for (; slot < btrfs_header_nritems(scratch_leaf); ++slot) {
|
|
btrfs_item_key_to_cpu(scratch_leaf, &found, slot);
|
|
if (found.type != BTRFS_EXTENT_ITEM_KEY &&
|
|
found.type != BTRFS_METADATA_ITEM_KEY)
|
|
continue;
|
|
if (found.type == BTRFS_METADATA_ITEM_KEY)
|
|
num_bytes = fs_info->extent_root->nodesize;
|
|
else
|
|
num_bytes = found.offset;
|
|
|
|
ret = btrfs_find_all_roots(NULL, fs_info, found.objectid, 0,
|
|
&roots);
|
|
if (ret < 0)
|
|
goto out;
|
|
/* For rescan, just pass old_roots as NULL */
|
|
ret = btrfs_qgroup_account_extent(trans, fs_info,
|
|
found.objectid, num_bytes, NULL, roots);
|
|
if (ret < 0)
|
|
goto out;
|
|
}
|
|
out:
|
|
btrfs_put_tree_mod_seq(fs_info, &tree_mod_seq_elem);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void btrfs_qgroup_rescan_worker(struct btrfs_work *work)
|
|
{
|
|
struct btrfs_fs_info *fs_info = container_of(work, struct btrfs_fs_info,
|
|
qgroup_rescan_work);
|
|
struct btrfs_path *path;
|
|
struct btrfs_trans_handle *trans = NULL;
|
|
struct extent_buffer *scratch_leaf = NULL;
|
|
int err = -ENOMEM;
|
|
int ret = 0;
|
|
|
|
path = btrfs_alloc_path();
|
|
if (!path)
|
|
goto out;
|
|
scratch_leaf = kmalloc(sizeof(*scratch_leaf), GFP_NOFS);
|
|
if (!scratch_leaf)
|
|
goto out;
|
|
|
|
err = 0;
|
|
while (!err) {
|
|
trans = btrfs_start_transaction(fs_info->fs_root, 0);
|
|
if (IS_ERR(trans)) {
|
|
err = PTR_ERR(trans);
|
|
break;
|
|
}
|
|
if (!fs_info->quota_enabled) {
|
|
err = -EINTR;
|
|
} else {
|
|
err = qgroup_rescan_leaf(fs_info, path, trans,
|
|
scratch_leaf);
|
|
}
|
|
if (err > 0)
|
|
btrfs_commit_transaction(trans, fs_info->fs_root);
|
|
else
|
|
btrfs_end_transaction(trans, fs_info->fs_root);
|
|
}
|
|
|
|
out:
|
|
kfree(scratch_leaf);
|
|
btrfs_free_path(path);
|
|
|
|
mutex_lock(&fs_info->qgroup_rescan_lock);
|
|
fs_info->qgroup_flags &= ~BTRFS_QGROUP_STATUS_FLAG_RESCAN;
|
|
|
|
if (err > 0 &&
|
|
fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT) {
|
|
fs_info->qgroup_flags &= ~BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT;
|
|
} else if (err < 0) {
|
|
fs_info->qgroup_flags |= BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT;
|
|
}
|
|
mutex_unlock(&fs_info->qgroup_rescan_lock);
|
|
|
|
/*
|
|
* only update status, since the previous part has alreay updated the
|
|
* qgroup info.
|
|
*/
|
|
trans = btrfs_start_transaction(fs_info->quota_root, 1);
|
|
if (IS_ERR(trans)) {
|
|
err = PTR_ERR(trans);
|
|
btrfs_err(fs_info,
|
|
"fail to start transaction for status update: %d\n",
|
|
err);
|
|
goto done;
|
|
}
|
|
ret = update_qgroup_status_item(trans, fs_info, fs_info->quota_root);
|
|
if (ret < 0) {
|
|
err = ret;
|
|
btrfs_err(fs_info, "fail to update qgroup status: %d\n", err);
|
|
}
|
|
btrfs_end_transaction(trans, fs_info->quota_root);
|
|
|
|
if (err >= 0) {
|
|
btrfs_info(fs_info, "qgroup scan completed%s",
|
|
err > 0 ? " (inconsistency flag cleared)" : "");
|
|
} else {
|
|
btrfs_err(fs_info, "qgroup scan failed with %d", err);
|
|
}
|
|
|
|
done:
|
|
complete_all(&fs_info->qgroup_rescan_completion);
|
|
}
|
|
|
|
/*
|
|
* Checks that (a) no rescan is running and (b) quota is enabled. Allocates all
|
|
* memory required for the rescan context.
|
|
*/
|
|
static int
|
|
qgroup_rescan_init(struct btrfs_fs_info *fs_info, u64 progress_objectid,
|
|
int init_flags)
|
|
{
|
|
int ret = 0;
|
|
|
|
if (!init_flags &&
|
|
(!(fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_RESCAN) ||
|
|
!(fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_ON))) {
|
|
ret = -EINVAL;
|
|
goto err;
|
|
}
|
|
|
|
mutex_lock(&fs_info->qgroup_rescan_lock);
|
|
spin_lock(&fs_info->qgroup_lock);
|
|
|
|
if (init_flags) {
|
|
if (fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_RESCAN)
|
|
ret = -EINPROGRESS;
|
|
else if (!(fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_ON))
|
|
ret = -EINVAL;
|
|
|
|
if (ret) {
|
|
spin_unlock(&fs_info->qgroup_lock);
|
|
mutex_unlock(&fs_info->qgroup_rescan_lock);
|
|
goto err;
|
|
}
|
|
fs_info->qgroup_flags |= BTRFS_QGROUP_STATUS_FLAG_RESCAN;
|
|
}
|
|
|
|
memset(&fs_info->qgroup_rescan_progress, 0,
|
|
sizeof(fs_info->qgroup_rescan_progress));
|
|
fs_info->qgroup_rescan_progress.objectid = progress_objectid;
|
|
|
|
spin_unlock(&fs_info->qgroup_lock);
|
|
mutex_unlock(&fs_info->qgroup_rescan_lock);
|
|
|
|
init_completion(&fs_info->qgroup_rescan_completion);
|
|
|
|
memset(&fs_info->qgroup_rescan_work, 0,
|
|
sizeof(fs_info->qgroup_rescan_work));
|
|
btrfs_init_work(&fs_info->qgroup_rescan_work,
|
|
btrfs_qgroup_rescan_helper,
|
|
btrfs_qgroup_rescan_worker, NULL, NULL);
|
|
|
|
if (ret) {
|
|
err:
|
|
btrfs_info(fs_info, "qgroup_rescan_init failed with %d", ret);
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
qgroup_rescan_zero_tracking(struct btrfs_fs_info *fs_info)
|
|
{
|
|
struct rb_node *n;
|
|
struct btrfs_qgroup *qgroup;
|
|
|
|
spin_lock(&fs_info->qgroup_lock);
|
|
/* clear all current qgroup tracking information */
|
|
for (n = rb_first(&fs_info->qgroup_tree); n; n = rb_next(n)) {
|
|
qgroup = rb_entry(n, struct btrfs_qgroup, node);
|
|
qgroup->rfer = 0;
|
|
qgroup->rfer_cmpr = 0;
|
|
qgroup->excl = 0;
|
|
qgroup->excl_cmpr = 0;
|
|
}
|
|
spin_unlock(&fs_info->qgroup_lock);
|
|
}
|
|
|
|
int
|
|
btrfs_qgroup_rescan(struct btrfs_fs_info *fs_info)
|
|
{
|
|
int ret = 0;
|
|
struct btrfs_trans_handle *trans;
|
|
|
|
ret = qgroup_rescan_init(fs_info, 0, 1);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/*
|
|
* We have set the rescan_progress to 0, which means no more
|
|
* delayed refs will be accounted by btrfs_qgroup_account_ref.
|
|
* However, btrfs_qgroup_account_ref may be right after its call
|
|
* to btrfs_find_all_roots, in which case it would still do the
|
|
* accounting.
|
|
* To solve this, we're committing the transaction, which will
|
|
* ensure we run all delayed refs and only after that, we are
|
|
* going to clear all tracking information for a clean start.
|
|
*/
|
|
|
|
trans = btrfs_join_transaction(fs_info->fs_root);
|
|
if (IS_ERR(trans)) {
|
|
fs_info->qgroup_flags &= ~BTRFS_QGROUP_STATUS_FLAG_RESCAN;
|
|
return PTR_ERR(trans);
|
|
}
|
|
ret = btrfs_commit_transaction(trans, fs_info->fs_root);
|
|
if (ret) {
|
|
fs_info->qgroup_flags &= ~BTRFS_QGROUP_STATUS_FLAG_RESCAN;
|
|
return ret;
|
|
}
|
|
|
|
qgroup_rescan_zero_tracking(fs_info);
|
|
|
|
btrfs_queue_work(fs_info->qgroup_rescan_workers,
|
|
&fs_info->qgroup_rescan_work);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int btrfs_qgroup_wait_for_completion(struct btrfs_fs_info *fs_info)
|
|
{
|
|
int running;
|
|
int ret = 0;
|
|
|
|
mutex_lock(&fs_info->qgroup_rescan_lock);
|
|
spin_lock(&fs_info->qgroup_lock);
|
|
running = fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_RESCAN;
|
|
spin_unlock(&fs_info->qgroup_lock);
|
|
mutex_unlock(&fs_info->qgroup_rescan_lock);
|
|
|
|
if (running)
|
|
ret = wait_for_completion_interruptible(
|
|
&fs_info->qgroup_rescan_completion);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* this is only called from open_ctree where we're still single threaded, thus
|
|
* locking is omitted here.
|
|
*/
|
|
void
|
|
btrfs_qgroup_rescan_resume(struct btrfs_fs_info *fs_info)
|
|
{
|
|
if (fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_RESCAN)
|
|
btrfs_queue_work(fs_info->qgroup_rescan_workers,
|
|
&fs_info->qgroup_rescan_work);
|
|
}
|