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author | Steve Wise <swise@opengridcomputing.com> | 2018-03-01 13:57:44 -0800 |
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committer | Doug Ledford <dledford@redhat.com> | 2018-03-08 15:03:03 -0500 |
commit | 00313983cda6f37f747058e58c1cb8fba02bc134 (patch) | |
tree | 70e6323e9d53958672bb012c3641e97964e98b56 /drivers/infiniband/core/restrack.c | |
parent | a3b641af72ba899991ed847556951128ef41d52f (diff) | |
download | linux-stable-00313983cda6f37f747058e58c1cb8fba02bc134.tar.gz linux-stable-00313983cda6f37f747058e58c1cb8fba02bc134.tar.bz2 linux-stable-00313983cda6f37f747058e58c1cb8fba02bc134.zip |
RDMA/nldev: provide detailed CM_ID information
Implement RDMA nldev netlink interface to get detailed CM_ID information.
Because cm_id's are attached to rdma devices in various work queue
contexts, the pid and task information at restrak_add() time is sometimes
not useful. For example, an nvme/f host connection cm_id ends up being
bound to a device in a work queue context and the resulting pid at attach
time no longer exists after connection setup. So instead we mark all
cm_id's created via the rdma_ucm as "user", and all others as "kernel".
This required tweaking the restrack code a little. It also required
wrapping some rdma_cm functions to allow passing the module name string.
Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to 'drivers/infiniband/core/restrack.c')
-rw-r--r-- | drivers/infiniband/core/restrack.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/drivers/infiniband/core/restrack.c b/drivers/infiniband/core/restrack.c index 41a780085e6d..6da949e7a50b 100644 --- a/drivers/infiniband/core/restrack.c +++ b/drivers/infiniband/core/restrack.c @@ -3,12 +3,15 @@ * Copyright (c) 2017-2018 Mellanox Technologies. All rights reserved. */ +#include <rdma/rdma_cm.h> #include <rdma/ib_verbs.h> #include <rdma/restrack.h> #include <linux/mutex.h> #include <linux/sched/task.h> #include <linux/pid_namespace.h> +#include "cma_priv.h" + void rdma_restrack_init(struct rdma_restrack_root *res) { init_rwsem(&res->rwsem); @@ -44,7 +47,7 @@ static void set_kern_name(struct rdma_restrack_entry *res) struct ib_qp *qp; if (type != RDMA_RESTRACK_QP) - /* PD and CQ types already have this name embedded in */ + /* Other types already have this name embedded in */ return; qp = container_of(res, struct ib_qp, res); @@ -67,6 +70,9 @@ static struct ib_device *res_to_dev(struct rdma_restrack_entry *res) return container_of(res, struct ib_cq, res)->device; case RDMA_RESTRACK_QP: return container_of(res, struct ib_qp, res)->device; + case RDMA_RESTRACK_CM_ID: + return container_of(res, struct rdma_id_private, + res)->id.device; default: WARN_ONCE(true, "Wrong resource tracking type %u\n", res->type); return NULL; @@ -82,6 +88,8 @@ static bool res_is_user(struct rdma_restrack_entry *res) return container_of(res, struct ib_cq, res)->uobject; case RDMA_RESTRACK_QP: return container_of(res, struct ib_qp, res)->uobject; + case RDMA_RESTRACK_CM_ID: + return !res->kern_name; default: WARN_ONCE(true, "Wrong resource tracking type %u\n", res->type); return false; @@ -96,8 +104,8 @@ void rdma_restrack_add(struct rdma_restrack_entry *res) return; if (res_is_user(res)) { - get_task_struct(current); - res->task = current; + if (!res->task) + rdma_restrack_set_task(res, current); res->kern_name = NULL; } else { set_kern_name(res); |