On 11/1/13, 4:56 PM, Zach Brown wrote:
>> +static int btrfs_ioctl_get_supported_features(struct file *file,
>> + void __user *arg)
>> +{
>> + struct btrfs_ioctl_feature_flags features[3];
>> +
>> + features[0].compat_flags = BTRFS_FEATURE_COMPAT_SUPP;
>> + features[0].compat_ro_flags = BTRFS_FEATURE_COMPAT_RO_SUPP;
>> + features[0].incompat_flags = BTRFS_FEATURE_INCOMPAT_SUPP;
>> +
>> + features[1].compat_flags = BTRFS_FEATURE_COMPAT_SAFE_SET;
>> + features[1].compat_ro_flags = BTRFS_FEATURE_COMPAT_RO_SAFE_SET;
>> + features[1].incompat_flags = BTRFS_FEATURE_INCOMPAT_SAFE_SET;
>> +
>> + features[2].compat_flags = BTRFS_FEATURE_COMPAT_SAFE_CLEAR;
>> + features[2].compat_ro_flags = BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR;
>> + features[2].incompat_flags = BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR;
>> +
>> + if (copy_to_user(arg, &features, sizeof(features)))
>> + return -EFAULT;
>
> If these are all constants shouldn't that just copy out of a static
> built flags array?
Works for me. Change added.
-Jeff
> #define cpp4ever(suff) \
> BTRFS_FEATURE_COMPAT_#suff, BTRFS_FEATURE_COMPAT_RO_#suff, \
> BTRFS_FEATURE_INCOMPAT_#suff
>
> static struct btrfs_ioctl_feature_flags features[3] = {
> { cpp4ever(SUPP) }, { cpp4ever(SAFE_SET) },
> { cpp4ever(SAFE_CLEAR) },
> };
>
> if (copy_to_user(arg, &features, sizeof(features)))
> return -EFAULT;
>
> ?
>
> - z
> --
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--
Jeff Mahoney
SUSE Labs
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