RDMA/nldev: Share with user-space object IDs

Give to the user space tools unique identifier for PD, MR, CQ and CM_ID
objects, so they can be able to query on them with .doit callbacks.

QP .doit is not supported yet, till all drivers will be updated to provide
their LQPN to be equal to their restrack ID.

Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

drivers/infiniband/core/nldev.c

@@ -108,6 +108,10 @@ static const struct nla_policy nldev_policy[RDMA_NLDEV_ATTR_MAX] = {
 	[RDMA_NLDEV_ATTR_DRIVER_U32]		= { .type = NLA_U32 },
 	[RDMA_NLDEV_ATTR_DRIVER_S64]		= { .type = NLA_S64 },
 	[RDMA_NLDEV_ATTR_DRIVER_U64]		= { .type = NLA_U64 },
+	[RDMA_NLDEV_ATTR_RES_PDN]		= { .type = NLA_U32 },
+	[RDMA_NLDEV_ATTR_RES_CQN]               = { .type = NLA_U32 },
+	[RDMA_NLDEV_ATTR_RES_MRN]               = { .type = NLA_U32 },
+	[RDMA_NLDEV_ATTR_RES_CM_IDN]            = { .type = NLA_U32 },
 };
 
 static int put_driver_name_print_type(struct sk_buff *msg, const char *name,
@@ -466,6 +470,9 @@ static int fill_res_cm_id_entry(struct sk_buff *msg, bool has_cap_net_admin,
 		    &cm_id->route.addr.dst_addr))
 		goto err;
 
+	if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_CM_IDN, res->id))
+		goto err;
+
 	if (fill_res_name_pid(msg, res))
 		goto err;
 
@@ -494,6 +501,9 @@ static int fill_res_cq_entry(struct sk_buff *msg, bool has_cap_net_admin,
 	    nla_put_u8(msg, RDMA_NLDEV_ATTR_RES_POLL_CTX, cq->poll_ctx))
 		goto err;
 
+	if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_CQN, res->id))
+		goto err;
+
 	if (fill_res_name_pid(msg, res))
 		goto err;
 
@@ -522,6 +532,9 @@ static int fill_res_mr_entry(struct sk_buff *msg, bool has_cap_net_admin,
 			      RDMA_NLDEV_ATTR_PAD))
 		goto err;
 
+	if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_MRN, res->id))
+		goto err;
+
 	if (fill_res_name_pid(msg, res))
 		goto err;
 
@@ -552,6 +565,9 @@ static int fill_res_pd_entry(struct sk_buff *msg, bool has_cap_net_admin,
 			      atomic_read(&pd->usecnt), RDMA_NLDEV_ATTR_PAD))
 		goto err;
 
+	if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_PDN, res->id))
+		goto err;
+
 	if (fill_res_name_pid(msg, res))
 		goto err;
 
@@ -893,6 +909,7 @@ static const struct nldev_fill_res_entry fill_entries[RDMA_RESTRACK_MAX] = {
 		.nldev_cmd = RDMA_NLDEV_CMD_RES_CM_ID_GET,
 		.nldev_attr = RDMA_NLDEV_ATTR_RES_CM_ID,
 		.entry = RDMA_NLDEV_ATTR_RES_CM_ID_ENTRY,
+		.id = RDMA_NLDEV_ATTR_RES_CM_IDN,
 	},
 	[RDMA_RESTRACK_CQ] = {
 		.fill_res_func = fill_res_cq_entry,
@@ -900,6 +917,7 @@ static const struct nldev_fill_res_entry fill_entries[RDMA_RESTRACK_MAX] = {
 		.nldev_attr = RDMA_NLDEV_ATTR_RES_CQ,
 		.flags = NLDEV_PER_DEV,
 		.entry = RDMA_NLDEV_ATTR_RES_CQ_ENTRY,
+		.id = RDMA_NLDEV_ATTR_RES_CQN,
 	},
 	[RDMA_RESTRACK_MR] = {
 		.fill_res_func = fill_res_mr_entry,
@@ -907,6 +925,7 @@ static const struct nldev_fill_res_entry fill_entries[RDMA_RESTRACK_MAX] = {
 		.nldev_attr = RDMA_NLDEV_ATTR_RES_MR,
 		.flags = NLDEV_PER_DEV,
 		.entry = RDMA_NLDEV_ATTR_RES_MR_ENTRY,
+		.id = RDMA_NLDEV_ATTR_RES_MRN,
 	},
 	[RDMA_RESTRACK_PD] = {
 		.fill_res_func = fill_res_pd_entry,
@@ -914,6 +933,7 @@ static const struct nldev_fill_res_entry fill_entries[RDMA_RESTRACK_MAX] = {
 		.nldev_attr = RDMA_NLDEV_ATTR_RES_PD,
 		.flags = NLDEV_PER_DEV,
 		.entry = RDMA_NLDEV_ATTR_RES_PD_ENTRY,
+		.id = RDMA_NLDEV_ATTR_RES_PDN,
 	},
 };
 

include/uapi/rdma/rdma_netlink.h

@@ -456,6 +456,15 @@ enum rdma_nldev_attr {
 	RDMA_NLDEV_ATTR_DRIVER_S64,		/* s64 */
 	RDMA_NLDEV_ATTR_DRIVER_U64,		/* u64 */
 
+	/*
+	 * Indexes to get/set secific entry,
+	 * for QP use RDMA_NLDEV_ATTR_RES_LQPN
+	 */
+	RDMA_NLDEV_ATTR_RES_PDN,               /* u32 */
+	RDMA_NLDEV_ATTR_RES_CQN,               /* u32 */
+	RDMA_NLDEV_ATTR_RES_MRN,               /* u32 */
+	RDMA_NLDEV_ATTR_RES_CM_IDN,            /* u32 */
+
 	/*
 	 * Always the end
 	 */