On Friday, 09 December, 2011 17:40:27 Stefan Behrens wrote:
> An ioctl interface is added to get the device statistic counters.
> A second ioctl is added to atomically get and reset these counters.
[...]
>
> +static long btrfs_ioctl_get_device_stats(struct btrfs_root *root,
> + void __user *arg, int reset_after_read)
> +{
> + struct btrfs_ioctl_get_device_stats *sa;
> + int ret;
> +
> + if (!capable(CAP_SYS_ADMIN))
> + return -EPERM;
> +
I agree that the BTRFS_IOC_GET_AND_RESET_DEVICE_STATS should be a privileged
operation. But I think that the BTRFS_IOC_GET_DEVICE_STATS should be allowed
to everyone. Think about a daemon which look at the error, and then send an
email to warn about possible defect. Allowing BTRFS_IOC_GET_DEVICE_STATS to
everyone, prevent to run the deamon with root privileges.
BR
G.Baroncelli
[...]
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