[PATCH v5 iproute2 4/8] rdma: Add link object

Leon Romanovsky
2017-08-17T06:37:34Z

Link (port) object represent struct ib_port to the user space.

Link properties:
* Port capabilities
* IB subnet prefix
* LID, SM_LID and LMC
* Port state
* Physical state

Signed-off-by: Leon Romanovsky <leonro-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
---
rdma/Makefile | 2 +-
rdma/link.c | 277 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
rdma/rdma.c | 3 +-
rdma/utils.c | 5 ++
4 files changed, 285 insertions(+), 2 deletions(-)
create mode 100644 rdma/link.c

diff --git a/rdma/Makefile b/rdma/Makefile
index 123d7ac5..1a9e4b1a 100644
--- a/rdma/Makefile
+++ b/rdma/Makefile
@@ -2,7 +2,7 @@ include ../Config

ifeq ($(HAVE_MNL),y)

-RDMA_OBJ = rdma.o utils.o dev.o
+RDMA_OBJ = rdma.o utils.o dev.o link.o

TARGETS=rdma
CFLAGS += $(shell $(PKG_CONFIG) libmnl --cflags)
diff --git a/rdma/link.c b/rdma/link.c
new file mode 100644
index 00000000..b0e5bee0
--- /dev/null
+++ b/rdma/link.c
@@ -0,0 +1,277 @@
+/*
+ * link.c RDMA tool
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * Authors: Leon Romanovsky <leonro-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
+ */
+
+#include "rdma.h"
+
+static int link_help(struct rd *rd)
+{
+ pr_out("Usage: %s link show [DEV/PORT_INDEX]\n", rd->filename);
+ return 0;
+}
+
+static const char *caps_to_str(uint32_t idx)
+{
+#define RDMA_PORT_FLAGS(x) \
+ x(SM, 1) \
+ x(NOTICE, 2) \
+ x(TRAP, 3) \
+ x(OPT_IPD, 4) \
+ x(AUTO_MIGR, 5) \
+ x(SL_MAP, 6) \
+ x(MKEY_NVRAM, 7) \
+ x(PKEY_NVRAM, 8) \
+ x(LED_INFO, 9) \
+ x(SM_DISABLED, 10) \
+ x(SYS_IMAGE_GUIG, 11) \
+ x(PKEY_SW_EXT_PORT_TRAP, 12) \
+ x(EXTENDED_SPEEDS, 14) \
+ x(CM, 16) \
+ x(SNMP_TUNNEL, 17) \
+ x(REINIT, 18) \
+ x(DEVICE_MGMT, 19) \
+ x(VENDOR_CLASS, 20) \
+ x(DR_NOTICE, 21) \
+ x(CAP_MASK_NOTICE, 22) \
+ x(BOOT_MGMT, 23) \
+ x(LINK_LATENCY, 24) \
+ x(CLIENT_REG, 23) \
+ x(IP_BASED_GIDS, 26)
+
+ enum { RDMA_PORT_FLAGS(RDMA_BITMAP_ENUM) };
+
+ static const char * const
+ rdma_port_names[] = { RDMA_PORT_FLAGS(RDMA_BITMAP_NAMES) };
+ #undef RDMA_PORT_FLAGS
+
+ if (idx < ARRAY_SIZE(rdma_port_names) && rdma_port_names[idx])
+ return rdma_port_names[idx];
+ return "UNKNOWN";
+}
+
+static void link_print_caps(struct nlattr **tb)
+{
+ uint64_t caps;
+ uint32_t idx;
+
+ if (!tb[RDMA_NLDEV_ATTR_CAP_FLAGS])
+ return;
+
+ caps = mnl_attr_get_u64(tb[RDMA_NLDEV_ATTR_CAP_FLAGS]);
+
+ pr_out("\n caps: <");
+ for (idx = 0; caps; idx++) {
+ if (caps & 0x1) {
+ pr_out("%s", caps_to_str(idx));
+ if (caps >> 0x1)
+ pr_out(", ");
+ }
+ caps >>= 0x1;
+ }
+
+ pr_out(">");
+}
+
+static void link_print_subnet_prefix(struct nlattr **tb)
+{
+ uint64_t subnet_prefix;
+
+ if (!tb[RDMA_NLDEV_ATTR_SUBNET_PREFIX])
+ return;
+
+ subnet_prefix = mnl_attr_get_u64(tb[RDMA_NLDEV_ATTR_SUBNET_PREFIX]);
+ rd_print_u64("subnet_prefix", subnet_prefix);
+}
+
+static void link_print_lid(struct nlattr **tb)
+{
+ if (!tb[RDMA_NLDEV_ATTR_LID])
+ return;
+
+ pr_out("lid %u ",
+ mnl_attr_get_u32(tb[RDMA_NLDEV_ATTR_LID]));
+}
+
+static void link_print_sm_lid(struct nlattr **tb)
+{
+ if (!tb[RDMA_NLDEV_ATTR_SM_LID])
+ return;
+
+ pr_out("sm_lid %u ",
+ mnl_attr_get_u32(tb[RDMA_NLDEV_ATTR_SM_LID]));
+}
+
+static void link_print_lmc(struct nlattr **tb)
+{
+ if (!tb[RDMA_NLDEV_ATTR_LMC])
+ return;
+
+ pr_out("lmc %u ", mnl_attr_get_u8(tb[RDMA_NLDEV_ATTR_LMC]));
+}
+
+static const char *link_state_to_str(uint8_t link_state)
+{
+ static const char * const link_state_str[] = { "NOP", "DOWN",
+ "INIT", "ARMED",
+ "ACTIVE",
+ "ACTIVE_DEFER" };
+ if (link_state < ARRAY_SIZE(link_state_str))
+ return link_state_str[link_state];
+ return "UNKNOWN";
+}
+
+static void link_print_state(struct nlattr **tb)
+{
+ uint8_t state;
+
+ if (!tb[RDMA_NLDEV_ATTR_PORT_STATE])
+ return;
+
+ state = mnl_attr_get_u8(tb[RDMA_NLDEV_ATTR_PORT_STATE]);
+ pr_out("state %s ", link_state_to_str(state));
+}
+
+static const char *phys_state_to_str(uint8_t phys_state)
+{
+ static const char * const phys_state_str[] = { "NOP", "SLEEP",
+ "POLLING", "DISABLED",
+ "ARMED", "LINK_UP",
+ "LINK_ERROR_RECOVER",
+ "PHY_TEST", "UNKNOWN",
+ "OPA_OFFLINE",
+ "UNKNOWN", "OPA_TEST" };
+ if (phys_state < ARRAY_SIZE(phys_state_str))
+ return phys_state_str[phys_state];
+ return "UNKNOWN";
+};
+
+static void link_print_phys_state(struct nlattr **tb)
+{
+ uint8_t phys_state;
+
+ if (!tb[RDMA_NLDEV_ATTR_PORT_PHYS_STATE])
+ return;
+
+ phys_state = mnl_attr_get_u8(tb[RDMA_NLDEV_ATTR_PORT_PHYS_STATE]);
+ pr_out("physical_state %s ", phys_state_to_str(phys_state));
+}
+
+static int link_parse_cb(const struct nlmsghdr *nlh, void *data)
+{
+ struct nlattr *tb[RDMA_NLDEV_ATTR_MAX] = {};
+ struct rd *rd = data;
+
+ mnl_attr_parse(nlh, 0, rd_attr_cb, tb);
+ if (!tb[RDMA_NLDEV_ATTR_DEV_INDEX] || !tb[RDMA_NLDEV_ATTR_DEV_NAME])
+ return MNL_CB_ERROR;
+
+ if (!tb[RDMA_NLDEV_ATTR_PORT_INDEX]) {
+ pr_err("This tool doesn't support switches yet\n");
+ return MNL_CB_ERROR;
+ }
+
+ pr_out("%u/%u: %s/%u: ",
+ mnl_attr_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]),
+ mnl_attr_get_u32(tb[RDMA_NLDEV_ATTR_PORT_INDEX]),
+ mnl_attr_get_str(tb[RDMA_NLDEV_ATTR_DEV_NAME]),
+ mnl_attr_get_u32(tb[RDMA_NLDEV_ATTR_PORT_INDEX]));
+ link_print_subnet_prefix(tb);
+ link_print_lid(tb);
+ link_print_sm_lid(tb);
+ link_print_lmc(tb);
+ link_print_state(tb);
+ link_print_phys_state(tb);
+ if (rd->show_details)
+ link_print_caps(tb);
+
+ pr_out("\n");
+ return MNL_CB_OK;
+}
+
+static int link_no_args(struct rd *rd)
+{
+ uint32_t seq;
+ int ret;
+
+ rd_prepare_msg(rd, RDMA_NLDEV_CMD_PORT_GET, &seq,
+ (NLM_F_REQUEST | NLM_F_ACK));
+ mnl_attr_put_u32(rd->nlh, RDMA_NLDEV_ATTR_DEV_INDEX, rd->dev_idx);
+ mnl_attr_put_u32(rd->nlh, RDMA_NLDEV_ATTR_PORT_INDEX, rd->port_idx);
+ ret = rd_send_msg(rd);
+ if (ret)
+ return ret;
+
+ return rd_recv_msg(rd, link_parse_cb, rd, seq);
+}
+
+static int link_one_show(struct rd *rd)
+{
+ const struct rd_cmd cmds[] = {
+ { NULL, link_no_args},
+ { 0 }
+ };
+
+ return rd_exec_cmd(rd, cmds, "parameter");
+}
+
+static int link_show(struct rd *rd)
+{
+ struct dev_map *dev_map;
+ uint32_t port;
+ int ret;
+
+ if (rd_no_arg(rd)) {
+ list_for_each_entry(dev_map, &rd->dev_map_list, list) {
+ rd->dev_idx = dev_map->idx;
+ for (port = 1; port < dev_map->num_ports + 1; port++) {
+ rd->port_idx = port;
+ ret = link_one_show(rd);
+ if (ret)
+ return ret;
+ }
+ }
+
+ } else {
+ dev_map = dev_map_lookup(rd, true);
+ port = get_port_from_argv(rd);
+ if (!dev_map || port > dev_map->num_ports) {
+ pr_err("Wrong device name\n");
+ return -ENOENT;
+ }
+ rd_arg_inc(rd);
+ rd->dev_idx = dev_map->idx;
+ rd->port_idx = port ? : 1;
+ for (; rd->port_idx < dev_map->num_ports + 1; rd->port_idx++) {
+ ret = link_one_show(rd);
+ if (ret)
+ return ret;
+ if (port)
+ /*
+ * We got request to show link for devname
+ * with port index.
+ */
+ break;
+ }
+ }
+ return 0;
+}
+
+int cmd_link(struct rd *rd)
+{
+ const struct rd_cmd cmds[] = {
+ { NULL, link_show },
+ { "show", link_show },
+ { "list", link_show },
+ { "help", link_help },
+ { 0 }
+ };
+
+ return rd_exec_cmd(rd, cmds, "link command");
+}
diff --git a/rdma/rdma.c b/rdma/rdma.c
index 9c2bdc8f..74c09e8b 100644
--- a/rdma/rdma.c
+++ b/rdma/rdma.c
@@ -15,7 +15,7 @@
static void help(char *name)
{
pr_out("Usage: %s [ OPTIONS ] OBJECT { COMMAND | help }\n"
- "where OBJECT := { dev | help }\n"
+ "where OBJECT := { dev | link | help }\n"
" OPTIONS := { -V[ersion] | -d[etails]}\n", name);
}

@@ -31,6 +31,7 @@ static int rd_cmd(struct rd *rd)
{ NULL, cmd_help },
{ "help", cmd_help },
{ "dev", cmd_dev },
+ { "link", cmd_link },
{ 0 }
};

diff --git a/rdma/utils.c b/rdma/utils.c
index 0e32eefe..91d05271 100644
--- a/rdma/utils.c
+++ b/rdma/utils.c
@@ -107,6 +107,11 @@ static const enum mnl_attr_data_type nldev_policy[RDMA_NLDEV_ATTR_MAX] = {
[RDMA_NLDEV_ATTR_FW_VERSION] = MNL_TYPE_NUL_STRING,
[RDMA_NLDEV_ATTR_NODE_GUID] = MNL_TYPE_U64,
[RDMA_NLDEV_ATTR_SYS_IMAGE_GUID] = MNL_TYPE_U64,
+ [RDMA_NLDEV_ATTR_LID] = MNL_TYPE_U32,
+ [RDMA_NLDEV_ATTR_SM_LID] = MNL_TYPE_U32,
+ [RDMA_NLDEV_ATTR_LMC] = MNL_TYPE_U8,
+ [RDMA_NLDEV_ATTR_PORT_STATE] = MNL_TYPE_U8,
+ [RDMA_NLDEV_ATTR_PORT_PHYS_STATE] = MNL_TYPE_U8,
[RDMA_NLDEV_ATTR_DEV_NODE_TYPE] = MNL_TYPE_U8,
};