[PATCH iproute2-next v6 2/2] rdma: display resource limits in curr/max format
flat view
STALE88d
From: Tao Cui <hidden>
Date: 2026-07-13 13:13:10
Also in:
linux-rdma
Subsystem:
the rest · Maintainer:
Linus Torvalds
From: Tao Cui <redacted> Parse the new RDMA_NLDEV_ATTR_RES_SUMMARY_ENTRY_MAX netlink attribute to show resource limits alongside current counts in curr/max format: Before: 0: mlx5_0: qp 123 cq 45 mr 200 pd 10 After: 0: mlx5_0: qp 123/131072 cq 45/65536 mr 200/1000000 pd 10/32768 JSON output provides both current and max fields per resource type (e.g. "qp": 123, "qp-max": 131072). Backward compatible: no output change when kernel lacks the new attribute. Signed-off-by: Tao Cui <redacted> Link: https://lore.kernel.org/all/20260615003646.168704-1-cui.tao@linux.dev/ (local) --- rdma/res.c | 21 ++++++++++++++++++++- rdma/utils.c | 1 + 2 files changed, 21 insertions(+), 1 deletion(-)
diff --git a/rdma/res.c b/rdma/res.c
index 062f0007..046935e2 100644
--- a/rdma/res.c
+++ b/rdma/res.c@@ -55,7 +55,26 @@ static int res_print_summary(struct nlattr **tb) name = mnl_attr_get_str(nla_line[RDMA_NLDEV_ATTR_RES_SUMMARY_ENTRY_NAME]); curr = mnl_attr_get_u64(nla_line[RDMA_NLDEV_ATTR_RES_SUMMARY_ENTRY_CURR]); - res_print_u64(name, curr, nla_line[RDMA_NLDEV_ATTR_RES_SUMMARY_ENTRY_CURR]); + if (nla_line[RDMA_NLDEV_ATTR_RES_SUMMARY_ENTRY_MAX]) { + uint64_t max; + char max_name[64]; + + max = mnl_attr_get_u64( + nla_line[RDMA_NLDEV_ATTR_RES_SUMMARY_ENTRY_MAX]); + snprintf(max_name, sizeof(max_name), "%s-max", name); + print_u64(PRINT_JSON, name, NULL, curr); + print_u64(PRINT_JSON, max_name, NULL, max); + if (!is_json_context()) { + char buf[64]; + + snprintf(buf, sizeof(buf), "%s %" PRIu64 "/%" PRIu64 " ", + name, curr, max); + pr_out("%s", buf); + } + } else { + res_print_u64(name, curr, + nla_line[RDMA_NLDEV_ATTR_RES_SUMMARY_ENTRY_CURR]); + } } return 0; }
diff --git a/rdma/utils.c b/rdma/utils.c
index 87003b2c..90ea1c55 100644
--- a/rdma/utils.c
+++ b/rdma/utils.c@@ -480,6 +480,7 @@ static const enum mnl_attr_data_type nldev_policy[RDMA_NLDEV_ATTR_MAX] = { [RDMA_NLDEV_ATTR_EVENT_TYPE] = MNL_TYPE_U8, [RDMA_NLDEV_SYS_ATTR_MONITOR_MODE] = MNL_TYPE_U8, [RDMA_NLDEV_ATTR_STAT_OPCOUNTER_ENABLED] = MNL_TYPE_U8, + [RDMA_NLDEV_ATTR_RES_SUMMARY_ENTRY_MAX] = MNL_TYPE_U64, }; static int rd_attr_check(const struct nlattr *attr, int *typep)
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2.43.0