Implement the RDMA nldev netlink interface for dumping detailed
CQ information.
Reviewed-by: Leon Romanovsky <leonro@xxxxxxxxxxxx>
Signed-off-by: Steve Wise <swise@xxxxxxxxxxxxxxxxxxxxx>
---
drivers/infiniband/core/nldev.c | 66 ++++++++++++++++++++++++++++++++++++++++
include/uapi/rdma/rdma_netlink.h | 8 +++++
2 files changed, 74 insertions(+)
diff --git a/drivers/infiniband/core/nldev.c b/drivers/infiniband/core/nldev.c
index 46ce553..b68b35c 100644
--- a/drivers/infiniband/core/nldev.c
+++ b/drivers/infiniband/core/nldev.c
@@ -80,6 +80,11 @@
.len = sizeof(struct __kernel_sockaddr_storage) },
[RDMA_NLDEV_ATTR_RES_DST_ADDR] = {
.len = sizeof(struct __kernel_sockaddr_storage) },
+ [RDMA_NLDEV_ATTR_RES_CQ] = { .type = NLA_NESTED },
+ [RDMA_NLDEV_ATTR_RES_CQ_ENTRY] = { .type = NLA_NESTED },
+ [RDMA_NLDEV_ATTR_RES_CQE] = { .type = NLA_U32 },
+ [RDMA_NLDEV_ATTR_RES_USECNT] = { .type = NLA_U64 },
+ [RDMA_NLDEV_ATTR_RES_POLL_CTX] = { .type = NLA_U8 },
};
static int fill_nldev_handle(struct sk_buff *msg, struct ib_device *device)
@@ -354,6 +359,51 @@ static int fill_res_cm_id_entry(struct sk_buff *msg,
return -EMSGSIZE;
}
+static int fill_res_cq_entry(struct sk_buff *msg, struct netlink_callback *cb,
+ struct rdma_restrack_entry *res, uint32_t port)
+{
+ struct ib_cq *cq = container_of(res, struct ib_cq, res);
+ struct nlattr *entry_attr;
+
+ entry_attr = nla_nest_start(msg, RDMA_NLDEV_ATTR_RES_CQ_ENTRY);
+ if (!entry_attr)
+ goto out;
+
+ if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_CQE, cq->cqe))
+ goto err;
+ if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_RES_USECNT,
+ atomic_read(&cq->usecnt), 0))
+ goto err;
+
+ /* Poll context is only valid for kernel CQs */
+ if (rdma_is_kernel_res(res) &&
+ nla_put_u8(msg, RDMA_NLDEV_ATTR_RES_POLL_CTX, cq->poll_ctx))
+ goto err;
+
+ /*
+ * Existence of task means that it is user CQ and netlink
+ * user is invited to go and read /proc/PID/comm to get name
+ * of the task file and res->task_com should be NULL.
+ */
+ if (rdma_is_kernel_res(res)) {
+ if (nla_put_string(msg, RDMA_NLDEV_ATTR_RES_KERN_NAME,
+ res->kern_name))
+ goto err;
+ } else {
+ if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_PID,
+ task_pid_vnr(res->task)))
+ goto err;
+ }
+
+ nla_nest_end(msg, entry_attr);
+ return 0;
+
+err:
+ nla_nest_cancel(msg, entry_attr);
+out:
+ return -EMSGSIZE;
+}
+
static int nldev_get_doit(struct sk_buff *skb, struct nlmsghdr *nlh,
struct netlink_ext_ack *extack)
{
@@ -783,6 +833,12 @@ static int res_get_common_dumpit(struct sk_buff *skb,
.nldev_cmd = RDMA_NLDEV_CMD_RES_CM_ID_GET,
.nldev_attr = RDMA_NLDEV_ATTR_RES_CM_ID,
},
+ [RDMA_RESTRACK_CQ] = {
+ .fill_res_func = fill_res_cq_entry,
+ .res_type = RDMA_RESTRACK_CQ,
+ .nldev_cmd = RDMA_NLDEV_CMD_RES_CQ_GET,
+ .nldev_attr = RDMA_NLDEV_ATTR_RES_CQ,
+ },
};
static int nldev_res_get_qp_dumpit(struct sk_buff *skb,
@@ -798,6 +854,13 @@ static int nldev_res_get_cm_id_dumpit(struct sk_buff *skb,
&fill_entries[RDMA_RESTRACK_CM_ID]);
}
+static int nldev_res_get_cq_dumpit(struct sk_buff *skb,
+ struct netlink_callback *cb)
+{
+ return res_get_common_dumpit(skb, cb,
+ &fill_entries[RDMA_RESTRACK_CQ]);
+}
+
static const struct rdma_nl_cbs nldev_cb_table[RDMA_NLDEV_NUM_OPS] = {
[RDMA_NLDEV_CMD_GET] = {
.doit = nldev_get_doit,
@@ -827,6 +890,9 @@ static int nldev_res_get_cm_id_dumpit(struct sk_buff *skb,
[RDMA_NLDEV_CMD_RES_CM_ID_GET] = {
.dump = nldev_res_get_cm_id_dumpit,
},
+ [RDMA_NLDEV_CMD_RES_CQ_GET] = {
+ .dump = nldev_res_get_cq_dumpit,
+ },
};
void __init nldev_init(void)
diff --git a/include/uapi/rdma/rdma_netlink.h b/include/uapi/rdma/rdma_netlink.h
index 0399aed..36cf1f0 100644
--- a/include/uapi/rdma/rdma_netlink.h
+++ b/include/uapi/rdma/rdma_netlink.h
@@ -240,6 +240,8 @@ enum rdma_nldev_command {
RDMA_NLDEV_CMD_RES_CM_ID_GET, /* can dump */
+ RDMA_NLDEV_CMD_RES_CQ_GET, /* can dump */
+
RDMA_NLDEV_NUM_OPS
};
@@ -364,6 +366,12 @@ enum rdma_nldev_attr {
RDMA_NLDEV_ATTR_RES_SRC_ADDR, /* __kernel_sockaddr_storage */
RDMA_NLDEV_ATTR_RES_DST_ADDR, /* __kernel_sockaddr_storage */
+ RDMA_NLDEV_ATTR_RES_CQ, /* nested table */
+ RDMA_NLDEV_ATTR_RES_CQ_ENTRY, /* nested table */
+ RDMA_NLDEV_ATTR_RES_CQE, /* u32 */
+ RDMA_NLDEV_ATTR_RES_USECNT, /* u64 */
+ RDMA_NLDEV_ATTR_RES_POLL_CTX, /* u8 */
+
RDMA_NLDEV_ATTR_MAX
};
#endif /* _UAPI_RDMA_NETLINK_H */
--
1.8.3.1
--
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