[PATCH 1/2] erofs: support query erofs ondemand feature by sysfs interface

[Gao Xiang]

On 2024/6/21 14:18, Hongbo Li wrote:
> Erofs over fscache depands on the config CONFIG_EROFS_FS_ONDEMAND
> in erofs. There is no way to check whether this feature is supported
> or not in userspace. We introduce sysfs file `erofs_ondemand` for
> user checking current features. Here is the example:
> 
> [Before]
> $ cat /sys/fs/erofs/features/erofs_ondemand
> cat: /sys/fs/erofs/features/erofs_ondemand: No such file or directory
> 
> [After]
> $ cat /sys/fs/erofs/features/erofs_ondemand
> supported
> 
> Signed-off-by: Hongbo Li <lihongbo22 at huawei.com>

Similar here, I guess you could pass in any `fsid` mount
option and check the return value instead.

Thanks,
Gao Xiang