1 // SPDX-License-Identifier: GPL-2.0
3 #include <linux/syscalls.h>
4 #include <linux/compat.h>
5 #include <linux/quotaops.h>
8 * This code works only for 32 bit quota tools over 64 bit OS (x86_64, ia64)
9 * and is necessary due to alignment problems.
11 struct compat_if_dqblk {
12 compat_u64 dqb_bhardlimit;
13 compat_u64 dqb_bsoftlimit;
14 compat_u64 dqb_curspace;
15 compat_u64 dqb_ihardlimit;
16 compat_u64 dqb_isoftlimit;
17 compat_u64 dqb_curinodes;
20 compat_uint_t dqb_valid;
24 struct compat_fs_qfilestat {
25 compat_u64 dqb_bhardlimit;
27 compat_uint_t qfs_nextents;
30 struct compat_fs_quota_stat {
34 struct compat_fs_qfilestat qs_uquota;
35 struct compat_fs_qfilestat qs_gquota;
36 compat_uint_t qs_incoredqs;
37 compat_int_t qs_btimelimit;
38 compat_int_t qs_itimelimit;
39 compat_int_t qs_rtbtimelimit;
44 asmlinkage long sys32_quotactl(unsigned int cmd, const char __user *special,
45 qid_t id, void __user *addr)
48 struct if_dqblk __user *dqblk;
49 struct compat_if_dqblk __user *compat_dqblk;
50 struct fs_quota_stat __user *fsqstat;
51 struct compat_fs_quota_stat __user *compat_fsqstat;
56 cmds = cmd >> SUBCMDSHIFT;
60 dqblk = compat_alloc_user_space(sizeof(struct if_dqblk));
62 ret = sys_quotactl(cmd, special, id, dqblk);
65 if (copy_in_user(compat_dqblk, dqblk, sizeof(*compat_dqblk)) ||
66 get_user(data, &dqblk->dqb_valid) ||
67 put_user(data, &compat_dqblk->dqb_valid))
71 dqblk = compat_alloc_user_space(sizeof(struct if_dqblk));
74 if (copy_in_user(dqblk, compat_dqblk, sizeof(*compat_dqblk)) ||
75 get_user(data, &compat_dqblk->dqb_valid) ||
76 put_user(data, &dqblk->dqb_valid))
78 ret = sys_quotactl(cmd, special, id, dqblk);
81 fsqstat = compat_alloc_user_space(sizeof(struct fs_quota_stat));
82 compat_fsqstat = addr;
83 ret = sys_quotactl(cmd, special, id, fsqstat);
87 /* Copying qs_version, qs_flags, qs_pad */
88 if (copy_in_user(compat_fsqstat, fsqstat,
89 offsetof(struct compat_fs_quota_stat, qs_uquota)))
91 /* Copying qs_uquota */
92 if (copy_in_user(&compat_fsqstat->qs_uquota,
94 sizeof(compat_fsqstat->qs_uquota)) ||
95 get_user(data, &fsqstat->qs_uquota.qfs_nextents) ||
96 put_user(data, &compat_fsqstat->qs_uquota.qfs_nextents))
98 /* Copying qs_gquota */
99 if (copy_in_user(&compat_fsqstat->qs_gquota,
101 sizeof(compat_fsqstat->qs_gquota)) ||
102 get_user(data, &fsqstat->qs_gquota.qfs_nextents) ||
103 put_user(data, &compat_fsqstat->qs_gquota.qfs_nextents))
105 /* Copying the rest */
106 if (copy_in_user(&compat_fsqstat->qs_incoredqs,
107 &fsqstat->qs_incoredqs,
108 sizeof(struct compat_fs_quota_stat) -
109 offsetof(struct compat_fs_quota_stat, qs_incoredqs)) ||
110 get_user(xdata, &fsqstat->qs_iwarnlimit) ||
111 put_user(xdata, &compat_fsqstat->qs_iwarnlimit))
116 ret = sys_quotactl(cmd, special, id, addr);