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quota: split out compat_sys_quotactl support from quota.c
Instead of adding ifdefs just split it into a new file. Signed-off-by: Christoph Hellwig <[email protected]> Signed-off-by: Jan Kara <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,118 @@ | ||
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| #include <linux/syscalls.h> | ||
| #include <linux/compat.h> | ||
| #include <linux/quotaops.h> | ||
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| /* | ||
| * 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; | ||
| }; | ||
|
|
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| /* XFS structures */ | ||
| struct compat_fs_qfilestat { | ||
| compat_u64 dqb_bhardlimit; | ||
| compat_u64 qfs_nblks; | ||
| compat_uint_t qfs_nextents; | ||
| }; | ||
|
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| 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; | ||
| }; | ||
|
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| 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; | ||
| } |
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