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Btrfs: fix incorrect {node,sector}size endianness from BTRFS_IOC_FS_INFO 

fs_info->super_copy->{node,sector}size are little-endian, but the ioctl
should return the values in native endianness. Use the cached values in
btrfs_fs_info instead. Found with sparse.

Fixes: 80a773fbfc ("btrfs: retrieve more info from FS_INFO ioctl")
Signed-off-by: Omar Sandoval <osandov@fb.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Omar Sandoval 2017-08-22 23:46:00 -07:00 committed by David Sterba
parent 5f14efd3d4
commit bea7eafdbd
1 changed files with 3 additions and 3 deletions
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6
fs/btrfs/ioctl.c
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@ -2769,9 +2769,9 @@ static long btrfs_ioctl_fs_info(struct btrfs_fs_info *fs_info,
}
mutex_unlock(&fs_devices->device_list_mutex);
fi_args->nodesize = fs_info->super_copy->nodesize;
fi_args->sectorsize = fs_info->super_copy->sectorsize;
fi_args->clone_alignment = fs_info->super_copy->sectorsize;
fi_args->nodesize = fs_info->nodesize;
fi_args->sectorsize = fs_info->sectorsize;
fi_args->clone_alignment = fs_info->sectorsize;
if (copy_to_user(arg, fi_args, sizeof(*fi_args)))
ret = -EFAULT;