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/*
* Store default Quotas in a specified quota record
*
* Copyright (C) Stefan (metze) Metzmacher 2003
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* 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, see <http://www.gnu.org/licenses/>.
*/
/*
* This module allows the default quota values,
* in the windows explorer GUI, to be stored on a samba server.
* The problem is that linux filesystems only store quotas
* for users and groups, but no default quotas.
*
* Samba returns NO_LIMIT as the default quotas by default
* and refuses to update them.
*
* With this module you can store the default quotas that are reported to
* a windows client, in the quota record of a user. By default the root user
* is taken because quota limits for root are typically not enforced.
*
* This module takes 2 parametric parameters in smb.conf:
* (the default prefix for them is 'default_quota',
* it can be overwrittem when you load the module in
* the 'vfs objects' parameter like this:
* vfs objects = default_quota:myprefix)
*
* "<myprefix>:uid" parameter takes a integer argument,
* it specifies the uid of the quota record, that will be taken for
* storing the default USER-quotas.
*
* - default value: '0' (for root user)
* - e.g.: default_quota:uid = 65534
*
* "<myprefix>:uid nolimit" parameter takes a boolean argument,
* it specifies if we should report the stored default quota values,
* also for the user record, or if you should just report NO_LIMIT
* to the windows client for the user specified by the "<prefix>:uid" parameter.
*
* - default value: yes (that means to report NO_LIMIT)
* - e.g.: default_quota:uid nolimit = no
*
* "<myprefix>:gid" parameter takes a integer argument,
* it's just like "<prefix>:uid" but for group quotas.
* (NOTE: group quotas are not supported from the windows explorer!)
*
* - default value: '0' (for root group)
* - e.g.: default_quota:gid = 65534
*
* "<myprefix>:gid nolimit" parameter takes a boolean argument,
* it's just like "<prefix>:uid nolimit" but for group quotas.
* (NOTE: group quotas are not supported from the windows explorer!)
*
* - default value: yes (that means to report NO_LIMIT)
* - e.g.: default_quota:uid nolimit = no
*
*/
#include "includes.h"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_QUOTA
#define DEFAULT_QUOTA_NAME "default_quota"
#define DEFAULT_QUOTA_UID_DEFAULT 0
#define DEFAULT_QUOTA_UID_NOLIMIT_DEFAULT True
#define DEFAULT_QUOTA_GID_DEFAULT 0
#define DEFAULT_QUOTA_GID_NOLIMIT_DEFAULT True
#define DEFAULT_QUOTA_UID(handle) \
(uid_t)lp_parm_int(SNUM((handle)->conn),DEFAULT_QUOTA_NAME,"uid",DEFAULT_QUOTA_UID_DEFAULT)
#define DEFAULT_QUOTA_UID_NOLIMIT(handle) \
lp_parm_bool(SNUM((handle)->conn),DEFAULT_QUOTA_NAME,"uid nolimit",DEFAULT_QUOTA_UID_NOLIMIT_DEFAULT)
#define DEFAULT_QUOTA_GID(handle) \
(gid_t)lp_parm_int(SNUM((handle)->conn),DEFAULT_QUOTA_NAME,"gid",DEFAULT_QUOTA_GID_DEFAULT)
#define DEFAULT_QUOTA_GID_NOLIMIT(handle) \
lp_parm_bool(SNUM((handle)->conn),DEFAULT_QUOTA_NAME,"gid nolimit",DEFAULT_QUOTA_GID_NOLIMIT_DEFAULT)
static int default_quota_get_quota(vfs_handle_struct *handle, enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *dq)
{
int ret = -1;
if ((ret=SMB_VFS_NEXT_GET_QUOTA(handle, qtype, id, dq))!=0) {
return ret;
}
switch (qtype) {
case SMB_USER_QUOTA_TYPE:
/* we use id.uid == 0 for default quotas */
if ((id.uid==DEFAULT_QUOTA_UID(handle)) &&
DEFAULT_QUOTA_UID_NOLIMIT(handle)) {
SMB_QUOTAS_SET_NO_LIMIT(dq);
}
break;
#ifdef HAVE_GROUP_QUOTA
case SMB_GROUP_QUOTA_TYPE:
/* we use id.gid == 0 for default quotas */
if ((id.gid==DEFAULT_QUOTA_GID(handle)) &&
DEFAULT_QUOTA_GID_NOLIMIT(handle)) {
SMB_QUOTAS_SET_NO_LIMIT(dq);
}
break;
#endif /* HAVE_GROUP_QUOTA */
case SMB_USER_FS_QUOTA_TYPE:
{
unid_t qid;
uint32 qflags = dq->qflags;
qid.uid = DEFAULT_QUOTA_UID(handle);
SMB_VFS_NEXT_GET_QUOTA(handle, SMB_USER_QUOTA_TYPE, qid, dq);
dq->qflags = qflags;
}
break;
#ifdef HAVE_GROUP_QUOTA
case SMB_GROUP_FS_QUOTA_TYPE:
{
unid_t qid;
uint32 qflags = dq->qflags;
qid.gid = DEFAULT_QUOTA_GID(handle);
SMB_VFS_NEXT_GET_QUOTA(handle, SMB_GROUP_QUOTA_TYPE, qid, dq);
dq->qflags = qflags;
}
break;
#endif /* HAVE_GROUP_QUOTA */
default:
errno = ENOSYS;
return -1;
break;
}
return ret;
}
static int default_quota_set_quota(vfs_handle_struct *handle, enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *dq)
{
int ret = -1;
switch (qtype) {
case SMB_USER_QUOTA_TYPE:
/* we use id.uid == 0 for default quotas */
if ((id.uid==DEFAULT_QUOTA_UID(handle)) &&
DEFAULT_QUOTA_UID_NOLIMIT(handle)) {
return -1;
}
break;
#ifdef HAVE_GROUP_QUOTA
case SMB_GROUP_QUOTA_TYPE:
/* we use id.gid == 0 for default quotas */
if ((id.gid==DEFAULT_QUOTA_GID(handle)) &&
DEFAULT_QUOTA_GID_NOLIMIT(handle)) {
return -1;
}
break;
#endif /* HAVE_GROUP_QUOTA */
case SMB_USER_FS_QUOTA_TYPE:
break;
#ifdef HAVE_GROUP_QUOTA
case SMB_GROUP_FS_QUOTA_TYPE:
break;
#endif /* HAVE_GROUP_QUOTA */
default:
errno = ENOSYS;
return -1;
break;
}
if ((ret=SMB_VFS_NEXT_SET_QUOTA(handle, qtype, id, dq))!=0) {
return ret;
}
switch (qtype) {
case SMB_USER_QUOTA_TYPE:
break;
#ifdef HAVE_GROUP_QUOTA
case SMB_GROUP_QUOTA_TYPE:
break;
#endif /* HAVE_GROUP_QUOTA */
case SMB_USER_FS_QUOTA_TYPE:
{
unid_t qid;
qid.uid = DEFAULT_QUOTA_UID(handle);
ret = SMB_VFS_NEXT_SET_QUOTA(handle, SMB_USER_QUOTA_TYPE, qid, dq);
}
break;
#ifdef HAVE_GROUP_QUOTA
case SMB_GROUP_FS_QUOTA_TYPE:
{
unid_t qid;
qid.gid = DEFAULT_QUOTA_GID(handle);
ret = SMB_VFS_NEXT_SET_QUOTA(handle, SMB_GROUP_QUOTA_TYPE, qid, dq);
}
break;
#endif /* HAVE_GROUP_QUOTA */
default:
errno = ENOSYS;
return -1;
break;
}
return ret;
}
/* VFS operations structure */
static vfs_op_tuple default_quota_ops[] = {
{SMB_VFS_OP(default_quota_get_quota), SMB_VFS_OP_GET_QUOTA, SMB_VFS_LAYER_TRANSPARENT},
{SMB_VFS_OP(default_quota_set_quota), SMB_VFS_OP_SET_QUOTA, SMB_VFS_LAYER_TRANSPARENT},
{SMB_VFS_OP(NULL), SMB_VFS_OP_NOOP, SMB_VFS_LAYER_NOOP}
};
NTSTATUS vfs_default_quota_init(void);
NTSTATUS vfs_default_quota_init(void)
{
return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, DEFAULT_QUOTA_NAME, default_quota_ops);
}
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