2 #include <linux/syscalls.h>
3 #include <linux/compat.h>
4 #include <linux/quotaops.h>
7 * This code works only for 32 bit quota tools over 64 bit OS (x86_64, ia64)
8 * and is necessary due to alignment problems.
10 struct compat_if_dqblk {
11 compat_u64 dqb_bhardlimit;
12 compat_u64 dqb_bsoftlimit;
13 compat_u64 dqb_curspace;
14 compat_u64 dqb_ihardlimit;
15 compat_u64 dqb_isoftlimit;
16 compat_u64 dqb_curinodes;
19 compat_uint_t dqb_valid;
23 struct compat_fs_qfilestat {
24 compat_u64 dqb_bhardlimit;
26 compat_uint_t qfs_nextents;
29 struct compat_fs_quota_stat {
33 struct compat_fs_qfilestat qs_uquota;
34 struct compat_fs_qfilestat qs_gquota;
35 compat_uint_t qs_incoredqs;
36 compat_int_t qs_btimelimit;
37 compat_int_t qs_itimelimit;
38 compat_int_t qs_rtbtimelimit;
43 asmlinkage long sys32_quotactl(unsigned int cmd, const char __user *special,
44 qid_t id, void __user *addr)
47 struct if_dqblk __user *dqblk;
48 struct compat_if_dqblk __user *compat_dqblk;
49 struct fs_quota_stat __user *fsqstat;
50 struct compat_fs_quota_stat __user *compat_fsqstat;
55 cmds = cmd >> SUBCMDSHIFT;
59 dqblk = compat_alloc_user_space(sizeof(struct if_dqblk));
61 ret = sys_quotactl(cmd, special, id, dqblk);
64 if (copy_in_user(compat_dqblk, dqblk, sizeof(*compat_dqblk)) ||
65 get_user(data, &dqblk->dqb_valid) ||
66 put_user(data, &compat_dqblk->dqb_valid))
70 dqblk = compat_alloc_user_space(sizeof(struct if_dqblk));
73 if (copy_in_user(dqblk, compat_dqblk, sizeof(*compat_dqblk)) ||
74 get_user(data, &compat_dqblk->dqb_valid) ||
75 put_user(data, &dqblk->dqb_valid))
77 ret = sys_quotactl(cmd, special, id, dqblk);
80 fsqstat = compat_alloc_user_space(sizeof(struct fs_quota_stat));
81 compat_fsqstat = addr;
82 ret = sys_quotactl(cmd, special, id, fsqstat);
86 /* Copying qs_version, qs_flags, qs_pad */
87 if (copy_in_user(compat_fsqstat, fsqstat,
88 offsetof(struct compat_fs_quota_stat, qs_uquota)))
90 /* Copying qs_uquota */
91 if (copy_in_user(&compat_fsqstat->qs_uquota,
93 sizeof(compat_fsqstat->qs_uquota)) ||
94 get_user(data, &fsqstat->qs_uquota.qfs_nextents) ||
95 put_user(data, &compat_fsqstat->qs_uquota.qfs_nextents))
97 /* Copying qs_gquota */
98 if (copy_in_user(&compat_fsqstat->qs_gquota,
100 sizeof(compat_fsqstat->qs_gquota)) ||
101 get_user(data, &fsqstat->qs_gquota.qfs_nextents) ||
102 put_user(data, &compat_fsqstat->qs_gquota.qfs_nextents))
104 /* Copying the rest */
105 if (copy_in_user(&compat_fsqstat->qs_incoredqs,
106 &fsqstat->qs_incoredqs,
107 sizeof(struct compat_fs_quota_stat) -
108 offsetof(struct compat_fs_quota_stat, qs_incoredqs)) ||
109 get_user(xdata, &fsqstat->qs_iwarnlimit) ||
110 put_user(xdata, &compat_fsqstat->qs_iwarnlimit))
115 ret = sys_quotactl(cmd, special, id, addr);