141 lines
3.1 KiB
C
141 lines
3.1 KiB
C
/*
|
|
* 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 "ctree.h"
|
|
|
|
u64 parse_qgroupid(char *p)
|
|
{
|
|
char *s = strchr(p, '/');
|
|
u64 level;
|
|
u64 id;
|
|
|
|
if (!s)
|
|
return atoll(p);
|
|
level = atoll(p);
|
|
id = atoll(s + 1);
|
|
|
|
return (level << 48) | id;
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
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);
|
|
|
|
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;
|
|
}
|