RDMA has weak connection between PIDs and HW objects, because
the latter tied to file descriptors for their lifetime management.
The outcome of such connection is that for the following scenario,
the returned PID will be 0 (not-valid):
1. Create FD and context
2. Share it with ephemeral child
3. Create any object and exit that child
This flow was revealed in testing environment and of course real users
are not running such scenario, because it makes no sense at all in RDMA
world.
Let's do two changes in the code to support such workflow anyway:
1. Remove need to provide PID/kernel name. Code already supports it,
just need to remove extra validation.
2. Ball-out in case PID is 0.
Link: https://lore.kernel.org/linux-rdma/20191002123245.18153-2-leon@kernel.org
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: David Ahern <dsahern@kernel.org>
Globally replace all filter function in safer variants of those
is_filtered functions, which take into account the availability/lack
of netlink attributes.
Such conversion allowed to fix a number of places in the code, where
the previous implementation didn't honor filter requests if netlink
attribute wasn't present.
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: David Ahern <dsahern@gmail.com>
If user provides specific index, we can speedup query
by using .doit callback and save full dump and filtering
after that.
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: David Ahern <dsahern@gmail.com>
Place check if netlink attribute available in general place,
instead of doing the same check in many paces.
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: David Ahern <dsahern@gmail.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: David Ahern <dsahern@gmail.com>
Remove duplicated functions in favour general res_print_uint() call.
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: David Ahern <dsahern@gmail.com>
Logically separate resource PD logic to separate file,
in order to make PD specific logic self-contained.
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: David Ahern <dsahern@gmail.com>
Leon Romanovsky