From: Leon Romanovsky <leonro@xxxxxxxxxxxx>
Add new general helper to get restrack entry given by ID and
their respective type.
Signed-off-by: Leon Romanovsky <leonro@xxxxxxxxxxxx>
---
drivers/infiniband/core/restrack.c | 22 ++++++++++++++++++++++
include/rdma/restrack.h | 3 +++
2 files changed, 25 insertions(+)
diff --git a/drivers/infiniband/core/restrack.c b/drivers/infiniband/core/restrack.c
index 6b8c07574589..7515425fc0fd 100644
--- a/drivers/infiniband/core/restrack.c
+++ b/drivers/infiniband/core/restrack.c
@@ -262,6 +262,28 @@ int __must_check rdma_restrack_get(struct rdma_restrack_entry *res)
}
EXPORT_SYMBOL(rdma_restrack_get);
+/**
+ * rdma_restrack_get_byid() - translate from ID to restrack object
+ * @dev: IB device
+ * @type: resource track type
+ * @id: ID to take a look
+ *
+ * Return: Pointer to restrack entry or -ENOENT in case of error.
+ */
+struct rdma_restrack_entry *
+rdma_restrack_get_byid(struct ib_device *dev,
+ enum rdma_restrack_type type, u32 id)
+{
+ struct rdma_restrack_root *rt = &dev->res;
+ struct rdma_restrack_entry *res;
+
+ res = xa_load(&rt->xa[type], id);
+ if (!res || xa_is_err(res) || !rdma_restrack_get(res))
+ return ERR_PTR(-ENOENT);
+ return res;
+}
+EXPORT_SYMBOL(rdma_restrack_get_byid);
+
static void restrack_release(struct kref *kref)
{
struct rdma_restrack_entry *res;
diff --git a/include/rdma/restrack.h b/include/rdma/restrack.h
index fe88128b8b78..c791c6e43a10 100644
--- a/include/rdma/restrack.h
+++ b/include/rdma/restrack.h
@@ -178,4 +178,7 @@ int rdma_nl_put_driver_u32_hex(struct sk_buff *msg, const char *name,
int rdma_nl_put_driver_u64(struct sk_buff *msg, const char *name, u64 value);
int rdma_nl_put_driver_u64_hex(struct sk_buff *msg, const char *name,
u64 value);
+struct rdma_restrack_entry *rdma_restrack_get_byid(struct ib_device *dev,
+ enum rdma_restrack_type type,
+ u32 id);
#endif /* _RDMA_RESTRACK_H_ */
--
2.19.1
