On Thu, Sep 12, 2024 at 06:17:26AM -0700, Yi Liu wrote:
> There is no helpers for user to check if a given ID is allocated or not,
> neither a helper to loop all the allocated IDs in an IDA and do something
> for cleanup. With the two needs, a helper to get the lowest allocated ID
> of a range and two variants based on it.
>
> Caller can check if a given ID is allocated or not by:
>
> bool ida_exists(struct ida *ida, unsigned int id)
>
> Caller can iterate all allocated IDs by:
>
> int id;
> while ((id = ida_find_first(&pasid_ida)) > 0) {
> //anything to do with the allocated ID
> ida_free(pasid_ida, pasid);
> }
>
> Cc: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
> Suggested-by: Jason Gunthorpe <jgg@xxxxxxxxxx>
> Signed-off-by: Yi Liu <yi.l.liu@xxxxxxxxx>
> ---
> include/linux/idr.h | 11 ++++++++
> lib/idr.c | 67 +++++++++++++++++++++++++++++++++++++++++++++
> 2 files changed, 78 insertions(+)
Reviewed-by: Jason Gunthorpe <jgg@xxxxxxxxxx>
Jason
