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/*
* Unix SMB/CIFS implementation.
* System QUOTA function wrappers for QUOTACTL_4B
* Copyright (C) 2011 James Peach.
*
* 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 2 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, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "includes.h"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_QUOTA
#ifndef HAVE_SYS_QUOTAS
#undef HAVE_QUOTACTL_4B
#endif
#ifdef HAVE_QUOTACTL_4B
/* int quotactl(const char *path, int cmd, int id, char *addr)
*
* This is used by many (all?) BSD-derived systems. This implementation has
* been developed and tested on Darwin, but may also work on other BSD systems.
*/
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_SYS_QUOTA_H
#include <sys/quota.h>
#endif
#ifdef HAVE_UFS_UFS_QUOTA_H
#include <ufs/ufs/quota.h>
#endif
#if defined(DARWINOS)
/* WorkARound broken HFS access checks in hfs_quotactl. Darwin only(?) */
#define HFS_QUOTACTL_WAR 1
#endif
static void xlate_qblk_to_smb(const struct dqblk * const qblk,
SMB_DISK_QUOTA *dp)
{
ZERO_STRUCTP(dp);
DEBUG(10, ("unix softlimit=%u hardlimit=%u curblock=%u\n",
(unsigned)qblk->dqb_bsoftlimit, (unsigned)qblk->dqb_bhardlimit,
#ifdef HAVE_STRUCT_DQBLK_DQB_CURBYTES
(unsigned)qblk->dqb_curbytes));
#else
(unsigned)qblk->dqb_curblocks));
#endif
DEBUGADD(10, ("unix softinodes=%u hardinodes=%u curinodes=%u\n",
(unsigned)qblk->dqb_isoftlimit, (unsigned)qblk->dqb_ihardlimit,
(unsigned)qblk->dqb_curinodes));
#ifdef HAVE_STRUCT_DQBLK_DQB_CURBYTES
/* On Darwin, quotas are counted in bytes. We report them
* in 512b blocks because various callers have assumptions
* about the block size.
*/
#define XLATE_TO_BLOCKS(bytes) (((bytes) + 1) / 512)
dp->bsize = 512;
dp->softlimit = XLATE_TO_BLOCKS(qblk->dqb_bsoftlimit);
dp->hardlimit = XLATE_TO_BLOCKS(qblk->dqb_bhardlimit);
dp->curblocks = XLATE_TO_BLOCKS(qblk->dqb_curbytes);
#undef XLATE_TO_BLOCKS
#endif
dp->ihardlimit = qblk->dqb_ihardlimit;
dp->isoftlimit = qblk->dqb_isoftlimit;
dp->curinodes = qblk->dqb_curinodes;
dp->qflags = QUOTAS_ENABLED | QUOTAS_DENY_DISK;
DEBUG(10, ("softlimit=%u hardlimit=%u curblock=%u\n",
(unsigned)dp->softlimit, (unsigned)dp->hardlimit,
(unsigned)dp->curblocks));
DEBUGADD(10, ("softinodes=%u hardinodes=%u curinodes=%u\n",
(unsigned)dp->isoftlimit, (unsigned)dp->ihardlimit,
(unsigned)dp->curinodes));
}
static void xlate_smb_to_qblk(const SMB_DISK_QUOTA * const dp,
struct dqblk *qblk)
{
ZERO_STRUCTP(qblk);
qblk->dqb_bsoftlimit = dp->softlimit;
qblk->dqb_bhardlimit = dp->hardlimit;
#ifdef HAVE_STRUCT_DQBLK_DQB_CURBYTES
/* On Darwin, quotas are counted in bytes. */
qblk->dqb_bsoftlimit *= dp->bsize;
qblk->dqb_bhardlimit *= dp->bsize;
#endif
qblk->dqb_ihardlimit = dp->ihardlimit;
qblk->dqb_isoftlimit = dp->isoftlimit;
}
static int sys_quotactl_4B(const char * path, int cmd,
int id, struct dqblk *qblk)
{
int ret;
/* NB: We must test GRPQUOTA here, because USRQUOTA is 0. */
DEBUG(10, ("%s quota for %s ID %u on %s\n",
(cmd & QCMD(Q_GETQUOTA, 0)) ? "getting" : "setting",
(cmd & QCMD(0, GRPQUOTA)) ? "group" : "user",
(unsigned)id, path));
#ifdef HFS_QUOTACTL_WAR
become_root();
#endif /* HFS_QUOTACTL_WAR */
ret = quotactl(path, cmd, id, qblk);
if (ret == -1) {
/* ENOTSUP means quota support is not compiled in. EINVAL
* means that quotas are not configured (commonly).
*/
if (errno != ENOTSUP && errno != EINVAL) {
DEBUG(0, ("failed to %s quota for %s ID %u on %s: %s\n",
(cmd & QCMD(Q_GETQUOTA, 0)) ? "get" : "set",
(cmd & QCMD(0, GRPQUOTA)) ? "group" : "user",
(unsigned)id, path, strerror(errno)));
}
#ifdef HFS_QUOTACTL_WAR
unbecome_root();
#endif /* HFS_QUOTACTL_WAR */
return -1;
}
#ifdef HFS_QUOTACTL_WAR
unbecome_root();
#endif /* HFS_QUOTACTL_WAR */
return 0;
}
int sys_get_vfs_quota(const char *path, const char *bdev,
enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *dp)
{
int ret;
struct dqblk qblk;
ZERO_STRUCT(qblk);
switch (qtype) {
case SMB_USER_QUOTA_TYPE:
/* Get quota for provided UID. */
ret = sys_quotactl_4B(path, QCMD(Q_GETQUOTA, USRQUOTA),
id.uid, &qblk);
break;
case SMB_USER_FS_QUOTA_TYPE:
/* Get quota for current UID. */
ret = sys_quotactl_4B(path, QCMD(Q_GETQUOTA, USRQUOTA),
geteuid(), &qblk);
break;
case SMB_GROUP_QUOTA_TYPE:
/* Get quota for provided GID. */
ret = sys_quotactl_4B(path, QCMD(Q_GETQUOTA, GRPQUOTA),
id.gid, &qblk);
break;
case SMB_GROUP_FS_QUOTA_TYPE:
/* Get quota for current GID. */
ret = sys_quotactl_4B(path, QCMD(Q_GETQUOTA, GRPQUOTA),
getegid(), &qblk);
break;
default:
DEBUG(0, ("cannot get unsupported quota type: %u\n",
(unsigned)qtype));
errno = ENOSYS;
return -1;
}
if (ret == -1) {
return -1;
}
xlate_qblk_to_smb(&qblk, dp);
dp->qtype = qtype;
return ret;
}
int sys_set_vfs_quota(const char *path, const char *bdev,
enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *dp)
{
struct dqblk qblk;
xlate_smb_to_qblk(dp, &qblk);
switch (qtype) {
case SMB_USER_QUOTA_TYPE:
/* Set quota for provided UID. */
return sys_quotactl_4B(path, QCMD(Q_SETQUOTA, USRQUOTA),
id.uid, &qblk);
case SMB_USER_FS_QUOTA_TYPE:
/* Set quota for current UID. */
return sys_quotactl_4B(path, QCMD(Q_SETQUOTA, USRQUOTA),
geteuid(), &qblk);
case SMB_GROUP_QUOTA_TYPE:
/* Set quota for provided GID. */
return sys_quotactl_4B(path, QCMD(Q_SETQUOTA, GRPQUOTA),
id.gid, &qblk);
case SMB_GROUP_FS_QUOTA_TYPE:
/* Set quota for current GID. */
return sys_quotactl_4B(path, QCMD(Q_SETQUOTA, GRPQUOTA),
getegid(), &qblk);
default:
DEBUG(0, ("cannot set unsupported quota type: %u\n",
(unsigned)qtype));
errno = ENOSYS;
return -1;
}
}
#endif /* HAVE_QUOTACTL_4B */
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