119 lines
3.2 KiB
C
119 lines
3.2 KiB
C
|
|
#include <linux/syscalls.h>
|
|
#include <linux/compat.h>
|
|
#include <linux/quotaops.h>
|
|
|
|
/*
|
|
* This code works only for 32 bit quota tools over 64 bit OS (x86_64, ia64)
|
|
* and is necessary due to alignment problems.
|
|
*/
|
|
struct compat_if_dqblk {
|
|
compat_u64 dqb_bhardlimit;
|
|
compat_u64 dqb_bsoftlimit;
|
|
compat_u64 dqb_curspace;
|
|
compat_u64 dqb_ihardlimit;
|
|
compat_u64 dqb_isoftlimit;
|
|
compat_u64 dqb_curinodes;
|
|
compat_u64 dqb_btime;
|
|
compat_u64 dqb_itime;
|
|
compat_uint_t dqb_valid;
|
|
};
|
|
|
|
/* XFS structures */
|
|
struct compat_fs_qfilestat {
|
|
compat_u64 dqb_bhardlimit;
|
|
compat_u64 qfs_nblks;
|
|
compat_uint_t qfs_nextents;
|
|
};
|
|
|
|
struct compat_fs_quota_stat {
|
|
__s8 qs_version;
|
|
__u16 qs_flags;
|
|
__s8 qs_pad;
|
|
struct compat_fs_qfilestat qs_uquota;
|
|
struct compat_fs_qfilestat qs_gquota;
|
|
compat_uint_t qs_incoredqs;
|
|
compat_int_t qs_btimelimit;
|
|
compat_int_t qs_itimelimit;
|
|
compat_int_t qs_rtbtimelimit;
|
|
__u16 qs_bwarnlimit;
|
|
__u16 qs_iwarnlimit;
|
|
};
|
|
|
|
asmlinkage long sys32_quotactl(unsigned int cmd, const char __user *special,
|
|
qid_t id, void __user *addr)
|
|
{
|
|
unsigned int cmds;
|
|
struct if_dqblk __user *dqblk;
|
|
struct compat_if_dqblk __user *compat_dqblk;
|
|
struct fs_quota_stat __user *fsqstat;
|
|
struct compat_fs_quota_stat __user *compat_fsqstat;
|
|
compat_uint_t data;
|
|
u16 xdata;
|
|
long ret;
|
|
|
|
cmds = cmd >> SUBCMDSHIFT;
|
|
|
|
switch (cmds) {
|
|
case Q_GETQUOTA:
|
|
dqblk = compat_alloc_user_space(sizeof(struct if_dqblk));
|
|
compat_dqblk = addr;
|
|
ret = sys_quotactl(cmd, special, id, dqblk);
|
|
if (ret)
|
|
break;
|
|
if (copy_in_user(compat_dqblk, dqblk, sizeof(*compat_dqblk)) ||
|
|
get_user(data, &dqblk->dqb_valid) ||
|
|
put_user(data, &compat_dqblk->dqb_valid))
|
|
ret = -EFAULT;
|
|
break;
|
|
case Q_SETQUOTA:
|
|
dqblk = compat_alloc_user_space(sizeof(struct if_dqblk));
|
|
compat_dqblk = addr;
|
|
ret = -EFAULT;
|
|
if (copy_in_user(dqblk, compat_dqblk, sizeof(*compat_dqblk)) ||
|
|
get_user(data, &compat_dqblk->dqb_valid) ||
|
|
put_user(data, &dqblk->dqb_valid))
|
|
break;
|
|
ret = sys_quotactl(cmd, special, id, dqblk);
|
|
break;
|
|
case Q_XGETQSTAT:
|
|
fsqstat = compat_alloc_user_space(sizeof(struct fs_quota_stat));
|
|
compat_fsqstat = addr;
|
|
ret = sys_quotactl(cmd, special, id, fsqstat);
|
|
if (ret)
|
|
break;
|
|
ret = -EFAULT;
|
|
/* Copying qs_version, qs_flags, qs_pad */
|
|
if (copy_in_user(compat_fsqstat, fsqstat,
|
|
offsetof(struct compat_fs_quota_stat, qs_uquota)))
|
|
break;
|
|
/* Copying qs_uquota */
|
|
if (copy_in_user(&compat_fsqstat->qs_uquota,
|
|
&fsqstat->qs_uquota,
|
|
sizeof(compat_fsqstat->qs_uquota)) ||
|
|
get_user(data, &fsqstat->qs_uquota.qfs_nextents) ||
|
|
put_user(data, &compat_fsqstat->qs_uquota.qfs_nextents))
|
|
break;
|
|
/* Copying qs_gquota */
|
|
if (copy_in_user(&compat_fsqstat->qs_gquota,
|
|
&fsqstat->qs_gquota,
|
|
sizeof(compat_fsqstat->qs_gquota)) ||
|
|
get_user(data, &fsqstat->qs_gquota.qfs_nextents) ||
|
|
put_user(data, &compat_fsqstat->qs_gquota.qfs_nextents))
|
|
break;
|
|
/* Copying the rest */
|
|
if (copy_in_user(&compat_fsqstat->qs_incoredqs,
|
|
&fsqstat->qs_incoredqs,
|
|
sizeof(struct compat_fs_quota_stat) -
|
|
offsetof(struct compat_fs_quota_stat, qs_incoredqs)) ||
|
|
get_user(xdata, &fsqstat->qs_iwarnlimit) ||
|
|
put_user(xdata, &compat_fsqstat->qs_iwarnlimit))
|
|
break;
|
|
ret = 0;
|
|
break;
|
|
default:
|
|
ret = sys_quotactl(cmd, special, id, addr);
|
|
}
|
|
return ret;
|
|
}
|