projects / thirdparty / kernel / stable.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
| 5582c76f CH |
2 | |
| 3 | #include <linux/syscalls.h> | |
| 4 | #include <linux/compat.h> | |
| 5 | #include <linux/quotaops.h> | |
| 6 | ||
| 7 | /* | |
| 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. | |
| 10 | */ | |
| 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; | |
| 18 | compat_u64 dqb_btime; | |
| 19 | compat_u64 dqb_itime; | |
| 20 | compat_uint_t dqb_valid; | |
| 21 | }; | |
| 22 | ||
| 23 | /* XFS structures */ | |
| 24 | struct compat_fs_qfilestat { | |
| 25 | compat_u64 dqb_bhardlimit; | |
| 26 | compat_u64 qfs_nblks; | |
| 27 | compat_uint_t qfs_nextents; | |
| 28 | }; | |
| 29 | ||
| 30 | struct compat_fs_quota_stat { | |
| 31 | __s8 qs_version; | |
| 32 | __u16 qs_flags; | |
| 33 | __s8 qs_pad; | |
| 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; | |
| 40 | __u16 qs_bwarnlimit; | |
| 41 | __u16 qs_iwarnlimit; | |
| 42 | }; | |
| 43 | ||
| ab0d1e85 DB |
44 | COMPAT_SYSCALL_DEFINE4(quotactl32, unsigned int, cmd, |
| 45 | const char __user *, special, qid_t, id, | |
| 46 | void __user *, addr) | |
| 5582c76f CH |
47 | { |
| 48 | unsigned int cmds; | |
| 49 | struct if_dqblk __user *dqblk; | |
| 50 | struct compat_if_dqblk __user *compat_dqblk; | |
| 51 | struct fs_quota_stat __user *fsqstat; | |
| 52 | struct compat_fs_quota_stat __user *compat_fsqstat; | |
| 53 | compat_uint_t data; | |
| 54 | u16 xdata; | |
| 55 | long ret; | |
| 56 | ||
| 57 | cmds = cmd >> SUBCMDSHIFT; | |
| 58 | ||
| 59 | switch (cmds) { | |
| 60 | case Q_GETQUOTA: | |
| 61 | dqblk = compat_alloc_user_space(sizeof(struct if_dqblk)); | |
| 62 | compat_dqblk = addr; | |
| cb0b476a | 63 | ret = kernel_quotactl(cmd, special, id, dqblk); |
| 5582c76f CH |
64 | if (ret) |
| 65 | break; | |
| 66 | if (copy_in_user(compat_dqblk, dqblk, sizeof(*compat_dqblk)) || | |
| 67 | get_user(data, &dqblk->dqb_valid) || | |
| 68 | put_user(data, &compat_dqblk->dqb_valid)) | |
| 69 | ret = -EFAULT; | |
| 70 | break; | |
| 71 | case Q_SETQUOTA: | |
| 72 | dqblk = compat_alloc_user_space(sizeof(struct if_dqblk)); | |
| 73 | compat_dqblk = addr; | |
| 74 | ret = -EFAULT; | |
| 75 | if (copy_in_user(dqblk, compat_dqblk, sizeof(*compat_dqblk)) || | |
| 76 | get_user(data, &compat_dqblk->dqb_valid) || | |
| 77 | put_user(data, &dqblk->dqb_valid)) | |
| 78 | break; | |
| cb0b476a | 79 | ret = kernel_quotactl(cmd, special, id, dqblk); |
| 5582c76f CH |
80 | break; |
| 81 | case Q_XGETQSTAT: | |
| 82 | fsqstat = compat_alloc_user_space(sizeof(struct fs_quota_stat)); | |
| 83 | compat_fsqstat = addr; | |
| cb0b476a | 84 | ret = kernel_quotactl(cmd, special, id, fsqstat); |
| 5582c76f CH |
85 | if (ret) |
| 86 | break; | |
| 87 | ret = -EFAULT; | |
| 88 | /* Copying qs_version, qs_flags, qs_pad */ | |
| 89 | if (copy_in_user(compat_fsqstat, fsqstat, | |
| 90 | offsetof(struct compat_fs_quota_stat, qs_uquota))) | |
| 91 | break; | |
| 92 | /* Copying qs_uquota */ | |
| 93 | if (copy_in_user(&compat_fsqstat->qs_uquota, | |
| 94 | &fsqstat->qs_uquota, | |
| 95 | sizeof(compat_fsqstat->qs_uquota)) || | |
| 96 | get_user(data, &fsqstat->qs_uquota.qfs_nextents) || | |
| 97 | put_user(data, &compat_fsqstat->qs_uquota.qfs_nextents)) | |
| 98 | break; | |
| 99 | /* Copying qs_gquota */ | |
| 100 | if (copy_in_user(&compat_fsqstat->qs_gquota, | |
| 101 | &fsqstat->qs_gquota, | |
| 102 | sizeof(compat_fsqstat->qs_gquota)) || | |
| 103 | get_user(data, &fsqstat->qs_gquota.qfs_nextents) || | |
| 104 | put_user(data, &compat_fsqstat->qs_gquota.qfs_nextents)) | |
| 105 | break; | |
| 106 | /* Copying the rest */ | |
| 107 | if (copy_in_user(&compat_fsqstat->qs_incoredqs, | |
| 108 | &fsqstat->qs_incoredqs, | |
| 109 | sizeof(struct compat_fs_quota_stat) - | |
| 110 | offsetof(struct compat_fs_quota_stat, qs_incoredqs)) || | |
| 111 | get_user(xdata, &fsqstat->qs_iwarnlimit) || | |
| 112 | put_user(xdata, &compat_fsqstat->qs_iwarnlimit)) | |
| 113 | break; | |
| 114 | ret = 0; | |
| 115 | break; | |
| 116 | default: | |
| cb0b476a | 117 | ret = kernel_quotactl(cmd, special, id, addr); |
| 5582c76f CH |
118 | } |
| 119 | return ret; | |
| 120 | } |