blob: 368b262845448144b9bc881bc9d88104ceed8d42 [file] [log] [blame]
/*
* Copyright (C) 2012 STRATO. All rights reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public
* License v2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this program; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 021110-1307, USA.
*/
#include "qgroup.h"
#include <sys/ioctl.h>
#include "ctree.h"
#include "ioctl.h"
#define BTRFS_QGROUP_NFILTERS_INCREASE (2 * BTRFS_QGROUP_FILTER_MAX)
#define BTRFS_QGROUP_NCOMPS_INCREASE (2 * BTRFS_QGROUP_COMP_MAX)
struct qgroup_lookup {
struct rb_root root;
};
struct btrfs_qgroup {
struct rb_node rb_node;
struct rb_node sort_node;
/*
*all_parent_node is used to
*filter a qgroup's all parent
*/
struct rb_node all_parent_node;
u64 qgroupid;
/*
* info_item
*/
u64 generation;
u64 rfer; /*referenced*/
u64 rfer_cmpr; /*referenced compressed*/
u64 excl; /*exclusive*/
u64 excl_cmpr; /*exclusive compressed*/
/*
*limit_item
*/
u64 flags; /*which limits are set*/
u64 max_rfer;
u64 max_excl;
u64 rsv_rfer;
u64 rsv_excl;
/*qgroups this group is member of*/
struct list_head qgroups;
/*qgroups that are members of this group*/
struct list_head members;
};
/*
* glue structure to represent the relations
* between qgroups
*/
struct btrfs_qgroup_list {
struct list_head next_qgroup;
struct list_head next_member;
struct btrfs_qgroup *qgroup;
struct btrfs_qgroup *member;
};
/*
* qgroupid,rfer,excl default to set
*/
static struct {
char *name;
char *column_name;
int need_print;
int max_len;
} btrfs_qgroup_columns[] = {
{
.name = "qgroupid",
.column_name = "Qgroupid",
.need_print = 1,
.max_len = 8,
},
{
.name = "rfer",
.column_name = "Rfer",
.need_print = 1,
.max_len = 4,
},
{
.name = "excl",
.column_name = "Excl",
.need_print = 1,
.max_len = 4,
},
{ .name = "max_rfer",
.column_name = "Max_rfer",
.need_print = 0,
.max_len = 8,
},
{
.name = "max_excl",
.column_name = "Max_excl",
.need_print = 0,
.max_len = 8,
},
{
.name = "parent",
.column_name = "Parent",
.need_print = 0,
.max_len = 7,
},
{
.name = "child",
.column_name = "Child",
.need_print = 0,
.max_len = 5,
},
{
.name = NULL,
.column_name = NULL,
.need_print = 0,
},
};
static btrfs_qgroup_filter_func all_filter_funcs[];
static btrfs_qgroup_comp_func all_comp_funcs[];
void btrfs_qgroup_setup_print_column(enum btrfs_qgroup_column_enum column)
{
int i;
BUG_ON(column < 0 || column > BTRFS_QGROUP_ALL);
if (column < BTRFS_QGROUP_ALL) {
btrfs_qgroup_columns[column].need_print = 1;
return;
}
for (i = 0; i < BTRFS_QGROUP_ALL; i++)
btrfs_qgroup_columns[i].need_print = 1;
}
static int print_parent_column(struct btrfs_qgroup *qgroup)
{
struct btrfs_qgroup_list *list = NULL;
int len = 0;
list_for_each_entry(list, &qgroup->qgroups, next_qgroup) {
len += printf("%llu/%llu", (list->qgroup)->qgroupid >> 48,
((1ll << 48) - 1) & (list->qgroup)->qgroupid);
if (!list_is_last(&list->next_qgroup, &qgroup->qgroups))
len += printf(",");
}
if (list_empty(&qgroup->qgroups))
len += printf("---");
return len;
}
static int print_child_column(struct btrfs_qgroup *qgroup)
{
struct btrfs_qgroup_list *list = NULL;
int len = 0;
list_for_each_entry(list, &qgroup->members, next_member) {
len += printf("%llu/%llu", (list->member)->qgroupid >> 48,
((1ll << 48) - 1) & (list->member)->qgroupid);
if (!list_is_last(&list->next_member, &qgroup->members))
len += printf(",");
}
if (list_empty(&qgroup->members))
len += printf("---");
return len;
}
static void print_qgroup_column_add_blank(enum btrfs_qgroup_column_enum column,
int len)
{
len = btrfs_qgroup_columns[column].max_len - len;
while (len--)
printf(" ");
}
static void print_qgroup_column(struct btrfs_qgroup *qgroup,
enum btrfs_qgroup_column_enum column)
{
BUG_ON(column >= BTRFS_QGROUP_ALL || column < 0);
int len;
switch (column) {
case BTRFS_QGROUP_QGROUPID:
len = printf("%llu/%llu", qgroup->qgroupid >> 48,
((1ll << 48) - 1) & qgroup->qgroupid);
print_qgroup_column_add_blank(BTRFS_QGROUP_QGROUPID, len);
break;
case BTRFS_QGROUP_RFER:
len = printf("%llu", qgroup->rfer);
print_qgroup_column_add_blank(BTRFS_QGROUP_RFER, len);
break;
case BTRFS_QGROUP_EXCL:
len = printf("%llu", qgroup->excl);
print_qgroup_column_add_blank(BTRFS_QGROUP_EXCL, len);
break;
case BTRFS_QGROUP_PARENT:
len = print_parent_column(qgroup);
print_qgroup_column_add_blank(BTRFS_QGROUP_PARENT, len);
break;
case BTRFS_QGROUP_MAX_RFER:
len = printf("%llu", qgroup->max_rfer);
print_qgroup_column_add_blank(BTRFS_QGROUP_MAX_RFER, len);
break;
case BTRFS_QGROUP_MAX_EXCL:
len = printf("%llu", qgroup->max_excl);
print_qgroup_column_add_blank(BTRFS_QGROUP_MAX_EXCL, len);
break;
case BTRFS_QGROUP_CHILD:
len = print_child_column(qgroup);
print_qgroup_column_add_blank(BTRFS_QGROUP_CHILD, len);
break;
default:
break;
}
}
static void print_single_qgroup_table(struct btrfs_qgroup *qgroup)
{
int i;
for (i = 0; i < BTRFS_QGROUP_ALL; i++) {
if (!btrfs_qgroup_columns[i].need_print)
continue;
print_qgroup_column(qgroup, i);
if (i != BTRFS_QGROUP_CHILD)
printf(" ");
}
printf("\n");
}
static void print_table_head()
{
int i;
int len;
for (i = 0; i < BTRFS_QGROUP_ALL; i++) {
if (!btrfs_qgroup_columns[i].need_print)
continue;
printf("%s", btrfs_qgroup_columns[i].name);
len = btrfs_qgroup_columns[i].max_len -
strlen(btrfs_qgroup_columns[i].name);
while (len--)
printf(" ");
printf(" ");
}
printf("\n");
for (i = 0; i < BTRFS_QGROUP_ALL; i++) {
if (!btrfs_qgroup_columns[i].need_print)
continue;
len = strlen(btrfs_qgroup_columns[i].name);
while (len--)
printf("-");
len = btrfs_qgroup_columns[i].max_len -
strlen(btrfs_qgroup_columns[i].name);
printf(" ");
while (len--)
printf(" ");
}
printf("\n");
}
static void qgroup_lookup_init(struct qgroup_lookup *tree)
{
tree->root.rb_node = NULL;
}
static int comp_entry_with_qgroupid(struct btrfs_qgroup *entry1,
struct btrfs_qgroup *entry2,
int is_descending)
{
int ret;
if (entry1->qgroupid > entry2->qgroupid)
ret = 1;
else if (entry1->qgroupid < entry2->qgroupid)
ret = -1;
else
ret = 0;
return is_descending ? -ret : ret;
}
static int comp_entry_with_rfer(struct btrfs_qgroup *entry1,
struct btrfs_qgroup *entry2,
int is_descending)
{
int ret;
if (entry1->rfer > entry2->rfer)
ret = 1;
else if (entry1->rfer < entry2->rfer)
ret = -1;
else
ret = 0;
return is_descending ? -ret : ret;
}
static int comp_entry_with_excl(struct btrfs_qgroup *entry1,
struct btrfs_qgroup *entry2,
int is_descending)
{
int ret;
if (entry1->excl > entry2->excl)
ret = 1;
else if (entry1->excl < entry2->excl)
ret = -1;
else
ret = 0;
return is_descending ? -ret : ret;
}
static int comp_entry_with_max_rfer(struct btrfs_qgroup *entry1,
struct btrfs_qgroup *entry2,
int is_descending)
{
int ret;
if (entry1->max_rfer > entry2->max_rfer)
ret = 1;
else if (entry1->max_rfer < entry2->max_rfer)
ret = -1;
else
ret = 0;
return is_descending ? -ret : ret;
}
static int comp_entry_with_max_excl(struct btrfs_qgroup *entry1,
struct btrfs_qgroup *entry2,
int is_descending)
{
int ret;
if (entry1->max_excl > entry2->max_excl)
ret = 1;
else if (entry1->max_excl < entry2->max_excl)
ret = -1;
else
ret = 0;
return is_descending ? -ret : ret;
}
static btrfs_qgroup_comp_func all_comp_funcs[] = {
[BTRFS_QGROUP_COMP_QGROUPID] = comp_entry_with_qgroupid,
[BTRFS_QGROUP_COMP_RFER] = comp_entry_with_rfer,
[BTRFS_QGROUP_COMP_EXCL] = comp_entry_with_excl,
[BTRFS_QGROUP_COMP_MAX_RFER] = comp_entry_with_max_rfer,
[BTRFS_QGROUP_COMP_MAX_EXCL] = comp_entry_with_max_excl
};
static char *all_sort_items[] = {
[BTRFS_QGROUP_COMP_QGROUPID] = "qgroupid",
[BTRFS_QGROUP_COMP_RFER] = "rfer",
[BTRFS_QGROUP_COMP_EXCL] = "excl",
[BTRFS_QGROUP_COMP_MAX_RFER] = "max_rfer",
[BTRFS_QGROUP_COMP_MAX_EXCL] = "max_excl",
[BTRFS_QGROUP_COMP_MAX] = NULL,
};
static int btrfs_qgroup_get_sort_item(char *sort_name)
{
int i;
for (i = 0; i < BTRFS_QGROUP_COMP_MAX; i++) {
if (strcmp(sort_name, all_sort_items[i]) == 0)
return i;
}
return -1;
}
struct btrfs_qgroup_comparer_set *btrfs_qgroup_alloc_comparer_set(void)
{
struct btrfs_qgroup_comparer_set *set;
int size;
size = sizeof(struct btrfs_qgroup_comparer_set) +
BTRFS_QGROUP_NCOMPS_INCREASE *
sizeof(struct btrfs_qgroup_comparer);
set = malloc(size);
if (!set) {
fprintf(stderr, "memory allocation failed\n");
exit(1);
}
memset(set, 0, size);
set->total = BTRFS_QGROUP_NCOMPS_INCREASE;
return set;
}
void btrfs_qgroup_free_comparer_set(struct btrfs_qgroup_comparer_set *comp_set)
{
free(comp_set);
}
int btrfs_qgroup_setup_comparer(struct btrfs_qgroup_comparer_set **comp_set,
enum btrfs_qgroup_comp_enum comparer,
int is_descending)
{
struct btrfs_qgroup_comparer_set *set = *comp_set;
int size;
BUG_ON(!set);
BUG_ON(comparer >= BTRFS_QGROUP_COMP_MAX);
BUG_ON(set->ncomps > set->total);
if (set->ncomps == set->total) {
size = set->total + BTRFS_QGROUP_NCOMPS_INCREASE;
size = sizeof(*set) +
size * sizeof(struct btrfs_qgroup_comparer);
set = realloc(set, size);
if (!set) {
fprintf(stderr, "memory allocation failed\n");
exit(1);
}
memset(&set->comps[set->total], 0,
BTRFS_QGROUP_NCOMPS_INCREASE *
sizeof(struct btrfs_qgroup_comparer));
set->total += BTRFS_QGROUP_NCOMPS_INCREASE;
*comp_set = set;
}
BUG_ON(set->comps[set->ncomps].comp_func);
set->comps[set->ncomps].comp_func = all_comp_funcs[comparer];
set->comps[set->ncomps].is_descending = is_descending;
set->ncomps++;
return 0;
}
static int sort_comp(struct btrfs_qgroup *entry1, struct btrfs_qgroup *entry2,
struct btrfs_qgroup_comparer_set *set)
{
int qgroupid_compared = 0;
int i, ret = 0;
if (!set || !set->ncomps)
goto comp_qgroupid;
for (i = 0; i < set->ncomps; i++) {
if (!set->comps[i].comp_func)
break;
ret = set->comps[i].comp_func(entry1, entry2,
set->comps[i].is_descending);
if (ret)
return ret;
if (set->comps[i].comp_func == comp_entry_with_qgroupid)
qgroupid_compared = 1;
}
if (!qgroupid_compared) {
comp_qgroupid:
ret = comp_entry_with_qgroupid(entry1, entry2, 0);
}
return ret;
}
/*
* insert a new root into the tree. returns the existing root entry
* if one is already there. qgroupid is used
* as the key
*/
static int qgroup_tree_insert(struct qgroup_lookup *root_tree,
struct btrfs_qgroup *ins)
{
struct rb_node **p = &root_tree->root.rb_node;
struct rb_node *parent = NULL;
struct btrfs_qgroup *curr;
int ret;
while (*p) {
parent = *p;
curr = rb_entry(parent, struct btrfs_qgroup, rb_node);
ret = comp_entry_with_qgroupid(ins, curr, 0);
if (ret < 0)
p = &(*p)->rb_left;
else if (ret > 0)
p = &(*p)->rb_right;
else
return -EEXIST;
}
rb_link_node(&ins->rb_node, parent, p);
rb_insert_color(&ins->rb_node, &root_tree->root);
return 0;
}
/*
*find a given qgroupid in the tree. We return the smallest one,
*rb_next can be used to move forward looking for more if required
*/
static struct btrfs_qgroup *qgroup_tree_search(struct qgroup_lookup *root_tree,
u64 qgroupid)
{
struct rb_node *n = root_tree->root.rb_node;
struct btrfs_qgroup *entry;
struct btrfs_qgroup tmp;
int ret;
tmp.qgroupid = qgroupid;
while (n) {
entry = rb_entry(n, struct btrfs_qgroup, rb_node);
ret = comp_entry_with_qgroupid(&tmp, entry, 0);
if (ret < 0)
n = n->rb_left;
else if (ret > 0)
n = n->rb_right;
else
return entry;
}
return NULL;
}
static int update_qgroup(struct qgroup_lookup *qgroup_lookup, u64 qgroupid,
u64 generation, u64 rfer, u64 rfer_cmpr, u64 excl,
u64 excl_cmpr, u64 flags, u64 max_rfer, u64 max_excl,
u64 rsv_rfer, u64 rsv_excl, struct btrfs_qgroup *pa,
struct btrfs_qgroup *child)
{
struct btrfs_qgroup *bq;
struct btrfs_qgroup_list *list;
bq = qgroup_tree_search(qgroup_lookup, qgroupid);
if (!bq || bq->qgroupid != qgroupid)
return -ENOENT;
if (generation)
bq->generation = generation;
if (rfer)
bq->rfer = rfer;
if (rfer_cmpr)
bq->rfer_cmpr = rfer_cmpr;
if (excl)
bq->excl = excl;
if (excl_cmpr)
bq->excl_cmpr = excl_cmpr;
if (flags)
bq->flags = flags;
if (max_rfer)
bq->max_rfer = max_rfer;
if (max_excl)
bq->max_excl = max_excl;
if (rsv_rfer)
bq->rsv_rfer = rsv_rfer;
if (pa && child) {
list = malloc(sizeof(*list));
if (!list) {
fprintf(stderr, "memory allocation failed\n");
exit(1);
}
list->qgroup = pa;
list->member = child;
list_add_tail(&list->next_qgroup, &child->qgroups);
list_add_tail(&list->next_member, &pa->members);
}
return 0;
}
static int add_qgroup(struct qgroup_lookup *qgroup_lookup, u64 qgroupid,
u64 generation, u64 rfer, u64 rfer_cmpr, u64 excl,
u64 excl_cmpr, u64 flags, u64 max_rfer, u64 max_excl,
u64 rsv_rfer, u64 rsv_excl, struct btrfs_qgroup *parent,
struct btrfs_qgroup *child)
{
struct btrfs_qgroup *bq;
struct btrfs_qgroup_list *list;
int ret;
ret = update_qgroup(qgroup_lookup, qgroupid, generation, rfer,
rfer_cmpr, excl, excl_cmpr, flags, max_rfer,
max_excl, rsv_rfer, rsv_excl, parent, child);
if (!ret)
return 0;
bq = malloc(sizeof(*bq));
if (!bq) {
printf("memory allocation failed\n");
exit(1);
}
memset(bq, 0, sizeof(*bq));
if (qgroupid) {
bq->qgroupid = qgroupid;
INIT_LIST_HEAD(&bq->qgroups);
INIT_LIST_HEAD(&bq->members);
}
if (generation)
bq->generation = generation;
if (rfer)
bq->rfer = rfer;
if (rfer_cmpr)
bq->rfer_cmpr = rfer_cmpr;
if (excl)
bq->excl = excl;
if (excl_cmpr)
bq->excl_cmpr = excl_cmpr;
if (flags)
bq->flags = flags;
if (max_rfer)
bq->max_rfer = max_rfer;
if (max_excl)
bq->max_excl = max_excl;
if (rsv_rfer)
bq->rsv_rfer = rsv_rfer;
if (parent && child) {
list = malloc(sizeof(*list));
if (!list) {
fprintf(stderr, "memory allocation failed\n");
exit(1);
}
list->qgroup = parent;
list->member = child;
list_add_tail(&list->next_qgroup, &child->qgroups);
list_add_tail(&list->next_member, &parent->members);
}
ret = qgroup_tree_insert(qgroup_lookup, bq);
if (ret) {
printf("failed to insert tree %llu\n",
bq->qgroupid);
exit(1);
}
return ret;
}
static void __free_btrfs_qgroup(struct btrfs_qgroup *bq)
{
struct btrfs_qgroup_list *list;
while (!list_empty(&bq->qgroups)) {
list = list_entry((&bq->qgroups)->next,
struct btrfs_qgroup_list,
next_qgroup);
list_del(&list->next_qgroup);
list_del(&list->next_member);
free(list);
}
while (!list_empty(&bq->members)) {
list = list_entry((&bq->members)->next,
struct btrfs_qgroup_list,
next_member);
list_del(&list->next_qgroup);
list_del(&list->next_member);
free(list);
}
free(bq);
}
static void __free_all_qgroups(struct qgroup_lookup *root_tree)
{
struct btrfs_qgroup *entry;
struct rb_node *n;
n = rb_first(&root_tree->root);
while (n) {
entry = rb_entry(n, struct btrfs_qgroup, rb_node);
rb_erase(n, &root_tree->root);
__free_btrfs_qgroup(entry);
n = rb_first(&root_tree->root);
}
}
static int filter_all_parent_insert(struct qgroup_lookup *sort_tree,
struct btrfs_qgroup *bq)
{
struct rb_node **p = &sort_tree->root.rb_node;
struct rb_node *parent = NULL;
struct btrfs_qgroup *curr;
int ret;
while (*p) {
parent = *p;
curr = rb_entry(parent, struct btrfs_qgroup, all_parent_node);
ret = comp_entry_with_qgroupid(bq, curr, 0);
if (ret < 0)
p = &(*p)->rb_left;
else if (ret > 0)
p = &(*p)->rb_right;
else
return -EEXIST;
}
rb_link_node(&bq->all_parent_node, parent, p);
rb_insert_color(&bq->all_parent_node, &sort_tree->root);
return 0;
}
static int filter_by_parent(struct btrfs_qgroup *bq, u64 data)
{
struct btrfs_qgroup *qgroup =
(struct btrfs_qgroup *)(unsigned long)data;
if (data == 0)
return 0;
if (qgroup->qgroupid == bq->qgroupid)
return 1;
return 0;
}
static int filter_by_all_parent(struct btrfs_qgroup *bq, u64 data)
{
struct qgroup_lookup lookup;
struct qgroup_lookup *ql = &lookup;
struct btrfs_qgroup_list *list;
struct rb_node *n;
struct btrfs_qgroup *qgroup =
(struct btrfs_qgroup *)(unsigned long)data;
if (data == 0)
return 0;
if (bq->qgroupid == qgroup->qgroupid)
return 1;
qgroup_lookup_init(ql);
filter_all_parent_insert(ql, qgroup);
n = rb_first(&ql->root);
while (n) {
qgroup = rb_entry(n, struct btrfs_qgroup, all_parent_node);
if (!list_empty(&qgroup->qgroups)) {
list_for_each_entry(list, &qgroup->qgroups,
next_qgroup) {
if ((list->qgroup)->qgroupid == bq->qgroupid)
return 1;
filter_all_parent_insert(ql, list->qgroup);
}
}
rb_erase(n, &ql->root);
n = rb_first(&ql->root);
}
return 0;
}
static btrfs_qgroup_filter_func all_filter_funcs[] = {
[BTRFS_QGROUP_FILTER_PARENT] = filter_by_parent,
[BTRFS_QGROUP_FILTER_ALL_PARENT] = filter_by_all_parent,
};
struct btrfs_qgroup_filter_set *btrfs_qgroup_alloc_filter_set(void)
{
struct btrfs_qgroup_filter_set *set;
int size;
size = sizeof(struct btrfs_qgroup_filter_set) +
BTRFS_QGROUP_NFILTERS_INCREASE *
sizeof(struct btrfs_qgroup_filter);
set = malloc(size);
if (!set) {
fprintf(stderr, "memory allocation failed\n");
exit(1);
}
memset(set, 0, size);
set->total = BTRFS_QGROUP_NFILTERS_INCREASE;
return set;
}
void btrfs_qgroup_free_filter_set(struct btrfs_qgroup_filter_set *filter_set)
{
free(filter_set);
}
int btrfs_qgroup_setup_filter(struct btrfs_qgroup_filter_set **filter_set,
enum btrfs_qgroup_filter_enum filter, u64 data)
{
struct btrfs_qgroup_filter_set *set = *filter_set;
int size;
BUG_ON(!set);
BUG_ON(filter >= BTRFS_QGROUP_FILTER_MAX);
BUG_ON(set->nfilters > set->total);
if (set->nfilters == set->total) {
size = set->total + BTRFS_QGROUP_NFILTERS_INCREASE;
size = sizeof(*set) + size * sizeof(struct btrfs_qgroup_filter);
set = realloc(set, size);
if (!set) {
fprintf(stderr, "memory allocation failed\n");
exit(1);
}
memset(&set->filters[set->total], 0,
BTRFS_QGROUP_NFILTERS_INCREASE *
sizeof(struct btrfs_qgroup_filter));
set->total += BTRFS_QGROUP_NFILTERS_INCREASE;
*filter_set = set;
}
BUG_ON(set->filters[set->nfilters].filter_func);
set->filters[set->nfilters].filter_func = all_filter_funcs[filter];
set->filters[set->nfilters].data = data;
set->nfilters++;
return 0;
}
static int filter_qgroup(struct btrfs_qgroup *bq,
struct btrfs_qgroup_filter_set *set)
{
int i, ret;
if (!set || !set->nfilters)
return 1;
for (i = 0; i < set->nfilters; i++) {
if (!set->filters[i].filter_func)
break;
ret = set->filters[i].filter_func(bq, set->filters[i].data);
if (!ret)
return 0;
}
return 1;
}
static void pre_process_filter_set(struct qgroup_lookup *lookup,
struct btrfs_qgroup_filter_set *set)
{
int i;
struct btrfs_qgroup *qgroup_for_filter = NULL;
for (i = 0; i < set->nfilters; i++) {
if (set->filters[i].filter_func == filter_by_all_parent
|| set->filters[i].filter_func == filter_by_parent) {
qgroup_for_filter = qgroup_tree_search(lookup,
set->filters[i].data);
set->filters[i].data =
(u64)(unsigned long)qgroup_for_filter;
}
}
}
static int sort_tree_insert(struct qgroup_lookup *sort_tree,
struct btrfs_qgroup *bq,
struct btrfs_qgroup_comparer_set *comp_set)
{
struct rb_node **p = &sort_tree->root.rb_node;
struct rb_node *parent = NULL;
struct btrfs_qgroup *curr;
int ret;
while (*p) {
parent = *p;
curr = rb_entry(parent, struct btrfs_qgroup, sort_node);
ret = sort_comp(bq, curr, comp_set);
if (ret < 0)
p = &(*p)->rb_left;
else if (ret > 0)
p = &(*p)->rb_right;
else
return -EEXIST;
}
rb_link_node(&bq->sort_node, parent, p);
rb_insert_color(&bq->sort_node, &sort_tree->root);
return 0;
}
static void __update_columns_max_len(struct btrfs_qgroup *bq,
enum btrfs_qgroup_column_enum column)
{
BUG_ON(column >= BTRFS_QGROUP_ALL || column < 0);
struct btrfs_qgroup_list *list = NULL;
char tmp[100];
int len;
switch (column) {
case BTRFS_QGROUP_QGROUPID:
sprintf(tmp, "%llu/%llu", (bq->qgroupid >> 48),
bq->qgroupid & ((1ll << 48) - 1));
len = strlen(tmp);
if (btrfs_qgroup_columns[column].max_len < len)
btrfs_qgroup_columns[column].max_len = len;
break;
case BTRFS_QGROUP_RFER:
sprintf(tmp, "%llu", bq->rfer);
len = strlen(tmp);
if (btrfs_qgroup_columns[column].max_len < len)
btrfs_qgroup_columns[column].max_len = len;
break;
case BTRFS_QGROUP_EXCL:
sprintf(tmp, "%llu", bq->excl);
len = strlen(tmp);
if (btrfs_qgroup_columns[column].max_len < len)
btrfs_qgroup_columns[column].max_len = len;
break;
case BTRFS_QGROUP_MAX_RFER:
sprintf(tmp, "%llu", bq->max_rfer);
len = strlen(tmp);
if (btrfs_qgroup_columns[column].max_len < len)
btrfs_qgroup_columns[column].max_len = len;
break;
case BTRFS_QGROUP_MAX_EXCL:
sprintf(tmp, "%llu", bq->max_excl);
len = strlen(tmp);
if (btrfs_qgroup_columns[column].max_len < len)
btrfs_qgroup_columns[column].max_len = len;
break;
case BTRFS_QGROUP_PARENT:
len = 0;
list_for_each_entry(list, &bq->qgroups, next_qgroup) {
len += sprintf(tmp, "%llu/%llu",
(list->qgroup)->qgroupid >> 48,
((1ll << 48) - 1) & (list->qgroup)->qgroupid);
if (!list_is_last(&list->next_qgroup, &bq->qgroups))
len += 1;
}
if (btrfs_qgroup_columns[column].max_len < len)
btrfs_qgroup_columns[column].max_len = len;
break;
case BTRFS_QGROUP_CHILD:
len = 0;
list_for_each_entry(list, &bq->members, next_member) {
len += sprintf(tmp, "%llu/%llu",
(list->member)->qgroupid >> 48,
((1ll << 48) - 1) & (list->member)->qgroupid);
if (!list_is_last(&list->next_member, &bq->members))
len += 1;
}
if (btrfs_qgroup_columns[column].max_len < len)
btrfs_qgroup_columns[column].max_len = len;
break;
default:
break;
}
}
static void update_columns_max_len(struct btrfs_qgroup *bq)
{
int i;
for (i = 0; i < BTRFS_QGROUP_ALL; i++) {
if (!btrfs_qgroup_columns[i].need_print)
continue;
__update_columns_max_len(bq, i);
}
}
static void __filter_and_sort_qgroups(struct qgroup_lookup *all_qgroups,
struct qgroup_lookup *sort_tree,
struct btrfs_qgroup_filter_set *filter_set,
struct btrfs_qgroup_comparer_set *comp_set)
{
struct rb_node *n;
struct btrfs_qgroup *entry;
int ret;
qgroup_lookup_init(sort_tree);
pre_process_filter_set(all_qgroups, filter_set);
n = rb_last(&all_qgroups->root);
while (n) {
entry = rb_entry(n, struct btrfs_qgroup, rb_node);
ret = filter_qgroup(entry, filter_set);
if (ret) {
sort_tree_insert(sort_tree, entry, comp_set);
update_columns_max_len(entry);
}
n = rb_prev(n);
}
}
static int __qgroups_search(int fd, struct qgroup_lookup *qgroup_lookup)
{
int ret;
struct btrfs_ioctl_search_args args;
struct btrfs_ioctl_search_key *sk = &args.key;
struct btrfs_ioctl_search_header *sh;
unsigned long off = 0;
unsigned int i;
int e;
struct btrfs_qgroup_info_item *info;
struct btrfs_qgroup_limit_item *limit;
struct btrfs_qgroup *bq;
struct btrfs_qgroup *bq1;
u64 a1;
u64 a2;
u64 a3;
u64 a4;
u64 a5;
memset(&args, 0, sizeof(args));
sk->tree_id = BTRFS_QUOTA_TREE_OBJECTID;
sk->max_type = BTRFS_QGROUP_RELATION_KEY;
sk->min_type = BTRFS_QGROUP_INFO_KEY;
sk->max_objectid = (u64)-1;
sk->max_offset = (u64)-1;
sk->max_transid = (u64)-1;
sk->nr_items = 4096;
qgroup_lookup_init(qgroup_lookup);
while (1) {
ret = ioctl(fd, BTRFS_IOC_TREE_SEARCH, &args);
e = errno;
if (ret < 0) {
fprintf(stderr,
"ERROR: can't perform the search - %s\n",
strerror(e));
return ret;
}
/* the ioctl returns the number of item it found in nr_items */
if (sk->nr_items == 0)
break;
off = 0;
/*
* for each item, pull the key out of the header and then
* read the root_ref item it contains
*/
for (i = 0; i < sk->nr_items; i++) {
sh = (struct btrfs_ioctl_search_header *)(args.buf +
off);
off += sizeof(*sh);
if (sh->type == BTRFS_QGROUP_INFO_KEY) {
info = (struct btrfs_qgroup_info_item *)
(args.buf + off);
a1 = btrfs_stack_qgroup_info_generation(info);
a2 = btrfs_stack_qgroup_info_referenced(info);
a3 =
btrfs_stack_qgroup_info_referenced_compressed
(info);
a4 = btrfs_stack_qgroup_info_exclusive(info);
a5 =
btrfs_stack_qgroup_info_exclusive_compressed
(info);
add_qgroup(qgroup_lookup, sh->offset, a1, a2,
a3, a4, a5, 0, 0, 0, 0, 0, 0, 0);
} else if (sh->type == BTRFS_QGROUP_LIMIT_KEY) {
limit = (struct btrfs_qgroup_limit_item *)
(args.buf + off);
a1 = btrfs_stack_qgroup_limit_flags(limit);
a2 = btrfs_stack_qgroup_limit_max_referenced
(limit);
a3 = btrfs_stack_qgroup_limit_max_exclusive
(limit);
a4 = btrfs_stack_qgroup_limit_rsv_referenced
(limit);
a5 = btrfs_stack_qgroup_limit_rsv_exclusive
(limit);
add_qgroup(qgroup_lookup, sh->offset, 0, 0,
0, 0, 0, a1, a2, a3, a4, a5, 0, 0);
} else if (sh->type == BTRFS_QGROUP_RELATION_KEY) {
if (sh->offset < sh->objectid)
goto skip;
bq = qgroup_tree_search(qgroup_lookup,
sh->offset);
if (!bq)
goto skip;
bq1 = qgroup_tree_search(qgroup_lookup,
sh->objectid);
if (!bq1)
goto skip;
add_qgroup(qgroup_lookup, sh->offset, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, bq, bq1);
} else
goto done;
skip:
off += sh->len;
/*
* record the mins in sk so we can make sure the
* next search doesn't repeat this root
*/
sk->min_type = sh->type;
sk->min_offset = sh->offset;
sk->min_objectid = sh->objectid;
}
sk->nr_items = 4096;
/*
* this iteration is done, step forward one qgroup for the next
* ioctl
*/
if (sk->min_offset < (u64)-1)
sk->min_offset++;
else
break;
}
done:
return ret;
}
static void print_all_qgroups(struct qgroup_lookup *qgroup_lookup)
{
struct rb_node *n;
struct btrfs_qgroup *entry;
print_table_head();
n = rb_first(&qgroup_lookup->root);
while (n) {
entry = rb_entry(n, struct btrfs_qgroup, sort_node);
print_single_qgroup_table(entry);
n = rb_next(n);
}
}
int btrfs_show_qgroups(int fd,
struct btrfs_qgroup_filter_set *filter_set,
struct btrfs_qgroup_comparer_set *comp_set)
{
struct qgroup_lookup qgroup_lookup;
struct qgroup_lookup sort_tree;
int ret;
ret = __qgroups_search(fd, &qgroup_lookup);
if (ret)
return ret;
__filter_and_sort_qgroups(&qgroup_lookup, &sort_tree,
filter_set, comp_set);
print_all_qgroups(&sort_tree);
__free_all_qgroups(&qgroup_lookup);
btrfs_qgroup_free_filter_set(filter_set);
return ret;
}
u64 btrfs_get_path_rootid(int fd)
{
int ret;
struct btrfs_ioctl_ino_lookup_args args;
memset(&args, 0, sizeof(args));
args.objectid = BTRFS_FIRST_FREE_OBJECTID;
ret = ioctl(fd, BTRFS_IOC_INO_LOOKUP, &args);
if (ret < 0) {
fprintf(stderr,
"ERROR: can't perform the search -%s\n",
strerror(errno));
return ret;
}
return args.treeid;
}
int btrfs_qgroup_parse_sort_string(char *opt_arg,
struct btrfs_qgroup_comparer_set **comps)
{
int order;
int flag;
char *p;
char **ptr_argv;
int what_to_sort;
while ((p = strtok(opt_arg, ",")) != NULL) {
flag = 0;
ptr_argv = all_sort_items;
while (*ptr_argv) {
if (strcmp(*ptr_argv, p) == 0) {
flag = 1;
break;
} else {
p++;
if (strcmp(*ptr_argv, p) == 0) {
flag = 1;
p--;
break;
}
p--;
}
ptr_argv++;
}
if (flag == 0)
return -1;
else {
if (*p == '+') {
order = 0;
p++;
} else if (*p == '-') {
order = 1;
p++;
} else
order = 0;
what_to_sort = btrfs_qgroup_get_sort_item(p);
if (what_to_sort < 0)
return -1;
btrfs_qgroup_setup_comparer(comps, what_to_sort, order);
}
opt_arg = NULL;
}
return 0;
}
u64 parse_qgroupid(char *p)
{
char *s = strchr(p, '/');
char *ptr_src_end = p + strlen(p);
char *ptr_parse_end = NULL;
u64 level;
u64 id;
if (!s) {
id = strtoull(p, &ptr_parse_end, 10);
if (ptr_parse_end != ptr_src_end)
goto err;
return id;
}
level = strtoull(p, &ptr_parse_end, 10);
if (ptr_parse_end != s)
goto err;
id = strtoull(s+1, &ptr_parse_end, 10);
if (ptr_parse_end != ptr_src_end)
goto err;
return (level << 48) | id;
err:
fprintf(stderr, "ERROR:invalid qgroupid\n");
exit(-1);
}
int qgroup_inherit_size(struct btrfs_qgroup_inherit *p)
{
return sizeof(*p) + sizeof(p->qgroups[0]) *
(p->num_qgroups + 2 * p->num_ref_copies +
2 * p->num_excl_copies);
}
static int
qgroup_inherit_realloc(struct btrfs_qgroup_inherit **inherit, int n, int pos)
{
struct btrfs_qgroup_inherit *out;
int nitems = 0;
if (*inherit) {
nitems = (*inherit)->num_qgroups +
(*inherit)->num_ref_copies +
(*inherit)->num_excl_copies;
}
out = calloc(sizeof(*out) + sizeof(out->qgroups[0]) * (nitems + n), 1);
if (out == NULL) {
fprintf(stderr, "ERROR: Not enough memory\n");
return 13;
}
if (*inherit) {
struct btrfs_qgroup_inherit *i = *inherit;
int s = sizeof(out->qgroups[0]);
out->num_qgroups = i->num_qgroups;
out->num_ref_copies = i->num_ref_copies;
out->num_excl_copies = i->num_excl_copies;
memcpy(out->qgroups, i->qgroups, pos * s);
memcpy(out->qgroups + pos + n, i->qgroups + pos,
(nitems - pos) * s);
}
free(*inherit);
*inherit = out;
return 0;
}
int qgroup_inherit_add_group(struct btrfs_qgroup_inherit **inherit, char *arg)
{
int ret;
u64 qgroupid = parse_qgroupid(arg);
int pos = 0;
if (qgroupid == 0) {
fprintf(stderr, "ERROR: bad qgroup specification\n");
return 12;
}
if (*inherit)
pos = (*inherit)->num_qgroups;
ret = qgroup_inherit_realloc(inherit, 1, pos);
if (ret)
return ret;
(*inherit)->qgroups[(*inherit)->num_qgroups++] = qgroupid;
return 0;
}
int qgroup_inherit_add_copy(struct btrfs_qgroup_inherit **inherit, char *arg,
int type)
{
int ret;
u64 qgroup_src;
u64 qgroup_dst;
char *p;
int pos = 0;
p = strchr(arg, ':');
if (!p) {
bad:
fprintf(stderr, "ERROR: bad copy specification\n");
return 12;
}
*p = 0;
qgroup_src = parse_qgroupid(arg);
qgroup_dst = parse_qgroupid(p + 1);
*p = ':';
if (!qgroup_src || !qgroup_dst)
goto bad;
if (*inherit)
pos = (*inherit)->num_qgroups +
(*inherit)->num_ref_copies * 2 * type;
ret = qgroup_inherit_realloc(inherit, 2, pos);
if (ret)
return ret;
(*inherit)->qgroups[pos++] = qgroup_src;
(*inherit)->qgroups[pos++] = qgroup_dst;
if (!type)
++(*inherit)->num_ref_copies;
else
++(*inherit)->num_excl_copies;
return 0;
}