From: Leon Romanovsky <leo...@mellanox.com>

This patch adds ss-similar interface to view various resource
tracked objects. At this stage, only QP is presented.

1. Get all QPs for the specific device:
$ rdma res show qp link mlx5_4
DEV/PORT  LQPN       TYPE  STATE  PID        COMM
mlx5_4/-  8          UD    RESET  0          [ipoib-verbs]
mlx5_4/1  7          UD    RTS    0          [mlx5-gsi]
mlx5_4/1  1          GSI   RTS    0          [rdma-mad]
mlx5_4/1  0          SMI   RTS    0          [rdma-mad]

$ rdma res show qp link mlx5_4/
DEV/PORT  LQPN       TYPE  STATE  PID        COMM
mlx5_4/-  8          UD    RESET  0          [ipoib-verbs]
mlx5_4/1  7          UD    RTS    0          [mlx5-gsi]
mlx5_4/1  1          GSI   RTS    0          [rdma-mad]
mlx5_4/1  0          SMI   RTS    0          [rdma-mad]

2. Provide illegal port number (0 is illegal):
$ rdma res show qp link mlx5_4/0
Wrong device name

3. Get QPs of specific port:
$ rdma res show qp link mlx5_4/1
DEV/PORT  LQPN       TYPE  STATE  PID        COMM
mlx5_4/1  7          UD    RTS    0          [mlx5-gsi]
mlx5_4/1  1          GSI   RTS    0          [rdma-mad]
mlx5_4/1  0          SMI   RTS    0          [rdma-mad]

4. Get QPs which have not assigned port yet:
$ rdma res show qp link mlx5_4/-
DEV/PORT  LQPN       TYPE  STATE  PID        COMM
mlx5_4/-  8          UD    RESET  0          [ipoib-verbs]

5. Detailed view:
$ rdma res show qp link mlx5_4/- -d
DEV/PORT  LQPN       RQPN       TYPE  STATE  PID        COMM            SQ-PSN  
   RQ-PSN     PATH-MIG
mlx5_4/-  8          ---        UD    RESET  0          [ipoib-verbs]   0       
   ---        ---

6. Limit to specific columns (dev/port is always available):
$ rdma res show qp link mlx5_4/1 display pid,lqpn,comm
DEV/PORT  LQPN       PID        COMM
mlx5_4/1  7          0          [mlx5-gsi]
mlx5_4/1  1          0          [rdma-mad]
mlx5_4/1  0          0          [rdma-mad]

7. Detailed view (no change, due to "display" option):
$ rdma res show qp link mlx5_4/1 display pid,lqpn,comm -d
DEV/PORT  LQPN       PID        COMM
mlx5_4/1  7          0          [mlx5-gsi]
mlx5_4/1  1          0          [rdma-mad]
mlx5_4/1  0          0          [rdma-mad]

8. Limit to specific Local QPNs:
$ rdma res show qp link mlx5_4/1 display pid,lqpn,comm lqpn 0-6
DEV/PORT  LQPN       PID        COMM
mlx5_4/1  1          0          [rdma-mad]
mlx5_4/1  0          0          [rdma-mad]

Signed-off-by: Leon Romanovsky <leo...@mellanox.com>
---
 rdma/res.c   | 367 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 rdma/utils.c |  11 ++
 2 files changed, 378 insertions(+)

diff --git a/rdma/res.c b/rdma/res.c
index a70e87dd..ecd6b392 100644
--- a/rdma/res.c
+++ b/rdma/res.c
@@ -16,6 +16,9 @@ static int res_help(struct rd *rd)
 {
        pr_out("Usage: %s resource\n", rd->filename);
        pr_out("          resource show [DEV]\n");
+       pr_out("          resource show [qp]\n");
+       pr_out("          resource show qp link [DEV/PORT]\n");
+       pr_out("          resource show qp link [DEV/PORT] [FILTER-NAME 
FILTER-VALUE]\n");
        return 0;
 }
 
@@ -136,12 +139,376 @@ static int _res_send_msg(struct rd *rd, uint32_t 
command, mnl_cb_t callback)
                return rd_exec_link(rd, _##name, strict_port); \
        }
 
+struct column {
+       char filter_name[32];
+       char column_name[32];
+       bool in_simple_view;
+};
+
+static bool show_column(struct rd *rd, struct column *c)
+{
+       if (rd->json_output)
+               return true;
+
+       if (rd_check_is_key_exist(rd, "display"))
+               return rd_check_is_string_filtered(rd, "display", 
c->filter_name);
+
+       if (!rd->show_details)
+               return c->in_simple_view;
+       return true;
+}
+
+static const char *path_mig_to_str(uint8_t idx)
+{
+       static const char * const path_mig_str[] = { "MIGRATED",
+                                                    "REARM", "ARMED" };
+
+       if (idx < ARRAY_SIZE(path_mig_str))
+               return path_mig_str[idx];
+       return "UNKNOWN";
+}
+
+static const char *qp_states_to_str(uint8_t idx)
+{
+       static const char * const qp_states_str[] = { "RESET", "INIT",
+                                                     "RTR", "RTS", "SQD",
+                                                     "SQE", "ERR" };
+
+       if (idx < ARRAY_SIZE(qp_states_str))
+               return qp_states_str[idx];
+       return "UNKNOWN";
+}
+
+static const char *qp_types_to_str(uint8_t idx)
+{
+       static const char * const qp_types_str[] = { "SMI", "GSI", "RC",
+                                                    "UC", "UD", "RAW_IPV6",
+                                                    "RAW_ETHERTYPE",
+                                                    "UNKNOWN", "RAW_PACKET",
+                                                    "XRC_INI", "XRC_TGT" };
+
+       if (idx < ARRAY_SIZE(qp_types_str))
+               return qp_types_str[idx];
+       return "UNKNOWN";
+}
+
+static void print_lqpn(struct rd *rd, struct column *c, uint32_t val)
+{
+       if (!show_column(rd, c))
+               return;
+
+       if (!strcmpx(c->filter_name, "lqpn")) {
+               if (rd->json_output) {
+                       jsonw_uint_field(rd->jw, "lqpn", val);
+                       return;
+               }
+               pr_out("%-11u", val);
+       }
+}
+
+static void print_rqpn(struct rd *rd, struct column *c,
+                      uint32_t val, struct nlattr **nla_line)
+{
+       if (!show_column(rd, c))
+               return;
+
+       if (!strcmpx(c->filter_name, "rqpn")) {
+               if (rd->json_output) {
+                       if (nla_line[RDMA_NLDEV_ATTR_RES_RQPN])
+                               jsonw_uint_field(rd->jw, "rqpn", val);
+                       return;
+               }
+
+               if (nla_line[RDMA_NLDEV_ATTR_RES_RQPN])
+                       pr_out("%-11u", val);
+               else
+                       pr_out("%-11s", "---");
+       }
+}
+
+static void print_type(struct rd *rd, struct column *c, uint32_t val)
+{
+       if (!show_column(rd, c))
+               return;
+
+       if (!strcmpx(c->filter_name, "type")) {
+               if (rd->json_output) {
+                       jsonw_string_field(rd->jw, "type",
+                                          qp_types_to_str(val));
+                       return;
+               }
+               pr_out("%-6s", qp_types_to_str(val));
+       }
+}
+
+static void print_state(struct rd *rd, struct column *c, uint32_t val)
+{
+       if (!show_column(rd, c))
+               return;
+
+       if (!strcmpx(c->filter_name, "state")) {
+               if (rd->json_output) {
+                       jsonw_string_field(rd->jw, "state",
+                                          qp_states_to_str(val));
+                       return;
+               }
+               pr_out("%-7s", qp_states_to_str(val));
+       }
+}
+
+static void print_rqpsn(struct rd *rd, struct column *c,
+                       uint32_t val, struct nlattr **nla_line)
+{
+       if (!show_column(rd, c))
+               return;
+
+       if (!strcmpx(c->filter_name, "rq-psn")) {
+               if (rd->json_output) {
+                       if (nla_line[RDMA_NLDEV_ATTR_RES_RQ_PSN])
+                               jsonw_uint_field(rd->jw, "rq-psn", val);
+                       return;
+               }
+
+               if (nla_line[RDMA_NLDEV_ATTR_RES_RQ_PSN])
+                       pr_out("%-11u", val);
+               else
+                       pr_out("%-11s", "---");
+       }
+}
+
+static void print_sqpsn(struct rd *rd, struct column *c, uint32_t val)
+{
+       if (!show_column(rd, c))
+               return;
+
+       if (!strcmpx(c->filter_name, "sq-psn")) {
+               if (rd->json_output) {
+                       jsonw_uint_field(rd->jw, "sq-psn", val);
+                       return;
+               }
+               pr_out("%-11d", val);
+       }
+}
+
+static void print_pathmig(struct rd *rd, struct column *c,
+                         uint32_t val, struct nlattr **nla_line)
+{
+       if (!show_column(rd, c))
+               return;
+
+       if (!strcmpx(c->filter_name, "path-mig")) {
+               if (rd->json_output) {
+                       if (nla_line[RDMA_NLDEV_ATTR_RES_PATH_MIG_STATE])
+                               jsonw_string_field(rd->jw,
+                                                  "path-mig-state",
+                                                  path_mig_to_str(val));
+                       return;
+               }
+
+               if (nla_line[RDMA_NLDEV_ATTR_RES_PATH_MIG_STATE])
+                       pr_out("%-16s", path_mig_to_str(val));
+               else
+                       pr_out("%-16s", "---");
+       }
+}
+
+static void print_pid(struct rd *rd, struct column *c, uint32_t val)
+{
+       if (!show_column(rd, c))
+               return;
+
+       if (!strcmpx(c->filter_name, "pid")) {
+               if (rd->json_output) {
+                       jsonw_uint_field(rd->jw, "pid", val);
+                       return;
+               }
+               pr_out("%-11d", val);
+       }
+}
+
+static void print_comm(struct rd *rd, struct column *c,
+                      const char *str, struct nlattr **nla_line)
+{
+       if (!show_column(rd, c))
+               return;
+
+       if (!strcmpx(c->filter_name, "comm")) {
+               if (rd->json_output) {
+                       /* Don't beatify output in JSON format */
+                       jsonw_string_field(rd->jw, "comm", str);
+                       return;
+               }
+
+               if (nla_line[RDMA_NLDEV_ATTR_RES_PID]) {
+                       pr_out("%-16s ", str);
+               } else {
+                       char tmp[18];
+
+                       snprintf(tmp, sizeof(tmp), "[%s]", str);
+                       pr_out("%-16s", tmp);
+               }
+       }
+}
+
+static int res_qp_parse_cb(const struct nlmsghdr *nlh, void *data)
+{
+       static struct column c[] = { { .filter_name = "lqpn",
+                                      .column_name = "LQPN       ",
+                                      .in_simple_view = true },
+                                    { .filter_name = "rqpn",
+                                      .column_name = "RQPN       " },
+                                    { .filter_name = "type",
+                                      .column_name = "TYPE  ",
+                                       .in_simple_view = true },
+                                    { .filter_name = "state",
+                                      .column_name = "STATE  ",
+                                      .in_simple_view = true },
+                                    { .filter_name = "pid",
+                                      .column_name = "PID        ",
+                                      .in_simple_view = true },
+                                    { .filter_name = "comm",
+                                      .column_name = "COMM            ",
+                                      .in_simple_view = true },
+                                    { .filter_name = "sq-psn",
+                                      .column_name = "SQ-PSN     " },
+                                    { .filter_name = "rq-psn",
+                                      .column_name = "RQ-PSN     " },
+                                    { .filter_name = "path-mig",
+                                      .column_name = "PATH-MIG        " } };
+
+       struct nlattr *tb[RDMA_NLDEV_ATTR_MAX] = {};
+       struct nlattr *nla_table, *nla_entry;
+       static bool print_header = true;
+       struct rd *rd = data;
+       uint32_t cidx, idx;
+       const char *name;
+
+       mnl_attr_parse(nlh, 0, rd_attr_cb, tb);
+       if (!tb[RDMA_NLDEV_ATTR_DEV_INDEX] ||
+           !tb[RDMA_NLDEV_ATTR_DEV_NAME] ||
+           !tb[RDMA_NLDEV_ATTR_RES_QP])
+               return MNL_CB_ERROR;
+
+       name = mnl_attr_get_str(tb[RDMA_NLDEV_ATTR_DEV_NAME]);
+       idx =  mnl_attr_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
+       nla_table = tb[RDMA_NLDEV_ATTR_RES_QP];
+       if (!rd->json_output && print_header) {
+               pr_out("DEV/PORT  ");
+               for (cidx = 0; cidx < ARRAY_SIZE(c); cidx++)
+                       if (show_column(rd, &c[cidx]))
+                               pr_out("%s", c[cidx].column_name);
+               pr_out("\n");
+               print_header = false;
+       }
+
+       mnl_attr_for_each_nested(nla_entry, nla_table) {
+               struct nlattr *nla_line[RDMA_NLDEV_ATTR_MAX] = {};
+               uint32_t lqpn, rqpn = 0, rq_psn = 0, sq_psn;
+               uint8_t type, state, path_mig_state = 0;
+               uint32_t port = 0, pid = 0;
+               bool ignore_value = false;
+               char port_name[32];
+               const char *comm;
+               int err;
+
+               err = mnl_attr_parse_nested(nla_entry, rd_attr_cb, nla_line);
+               if (err != MNL_CB_OK)
+                       return -EINVAL;
+
+               if (!nla_line[RDMA_NLDEV_ATTR_RES_LQPN] ||
+                   !nla_line[RDMA_NLDEV_ATTR_RES_SQ_PSN] ||
+                   !nla_line[RDMA_NLDEV_ATTR_RES_TYPE] ||
+                   !nla_line[RDMA_NLDEV_ATTR_RES_STATE] ||
+                   !nla_line[RDMA_NLDEV_ATTR_RES_PID_COMM]) {
+                       return -EINVAL;
+               }
+
+               if (nla_line[RDMA_NLDEV_ATTR_PORT_INDEX])
+                       port = 
mnl_attr_get_u32(nla_line[RDMA_NLDEV_ATTR_PORT_INDEX]);
+
+               if (port != rd->port_idx)
+                       continue;
+
+               if (nla_line[RDMA_NLDEV_ATTR_PORT_INDEX])
+                       snprintf(port_name, 32, "%s/%u", name, port);
+               else
+                       snprintf(port_name, 32, "%s/-", name);
+
+               lqpn = mnl_attr_get_u32(nla_line[RDMA_NLDEV_ATTR_RES_LQPN]);
+               if (rd_check_is_filtered(rd, "lqpn", lqpn, false))
+                       continue;
+
+               if (nla_line[RDMA_NLDEV_ATTR_RES_RQPN])
+                       rqpn = 
mnl_attr_get_u32(nla_line[RDMA_NLDEV_ATTR_RES_RQPN]);
+               else
+                       ignore_value = true;
+
+               if (rd_check_is_filtered(rd, "rqpn", rqpn, ignore_value))
+                       continue;
+
+               if (nla_line[RDMA_NLDEV_ATTR_RES_RQ_PSN])
+                       rq_psn = 
mnl_attr_get_u32(nla_line[RDMA_NLDEV_ATTR_RES_RQ_PSN]);
+
+               sq_psn = mnl_attr_get_u32(nla_line[RDMA_NLDEV_ATTR_RES_SQ_PSN]);
+               if (nla_line[RDMA_NLDEV_ATTR_RES_PATH_MIG_STATE])
+                       path_mig_state = 
mnl_attr_get_u8(nla_line[RDMA_NLDEV_ATTR_RES_PATH_MIG_STATE]);
+               type = mnl_attr_get_u8(nla_line[RDMA_NLDEV_ATTR_RES_TYPE]);
+               state = mnl_attr_get_u8(nla_line[RDMA_NLDEV_ATTR_RES_STATE]);
+
+               if (nla_line[RDMA_NLDEV_ATTR_RES_PID])
+                       pid = 
mnl_attr_get_u32(nla_line[RDMA_NLDEV_ATTR_RES_PID]);
+
+               if (rd_check_is_filtered(rd, "pid", pid, false))
+                       continue;
+
+               comm = mnl_attr_get_str(nla_line[RDMA_NLDEV_ATTR_RES_PID_COMM]);
+
+               if (rd->json_output) {
+                       jsonw_start_array(rd->jw);
+                       jsonw_uint_field(rd->jw, "ifindex", idx);
+
+                       if (nla_line[RDMA_NLDEV_ATTR_PORT_INDEX])
+                               jsonw_uint_field(rd->jw, "port", port);
+
+                       jsonw_string_field(rd->jw, "ifname", port_name);
+               } else {
+                       pr_out("%-10s", port_name);
+               }
+
+               for (cidx = 0; cidx < ARRAY_SIZE(c); cidx++) {
+                       print_lqpn(rd, &c[cidx], lqpn);
+                       print_rqpn(rd, &c[cidx], rqpn, nla_line);
+
+                       print_type(rd, &c[cidx], type);
+                       print_state(rd, &c[cidx], state);
+
+                       print_rqpsn(rd, &c[cidx], rq_psn, nla_line);
+                       print_sqpsn(rd, &c[cidx], sq_psn);
+
+                       print_pathmig(rd, &c[cidx], path_mig_state, nla_line);
+                       print_pid(rd, &c[cidx], pid);
+                       print_comm(rd, &c[cidx], comm, nla_line);
+               }
+
+               if (rd->json_output)
+                       jsonw_end_array(rd->jw);
+               else
+                       pr_out("\n");
+       }
+       return MNL_CB_OK;
+}
+
 RES_FUNC(res_no_args,  RDMA_NLDEV_CMD_RES_GET, NULL, true);
 
+static const char * const qp_valid_filters[] = { "link", "lqpn", "rqpn",
+                                                "pid", "display", NULL };
+RES_FUNC(res_qp,       RDMA_NLDEV_CMD_RES_QP_GET, qp_valid_filters, false);
+
 static int res_show(struct rd *rd)
 {
        const struct rd_cmd cmds[] = {
                { NULL,         res_no_args     },
+               { "qp",         res_qp          },
                { 0 }
        };
 
diff --git a/rdma/utils.c b/rdma/utils.c
index d39e926e..288c6b9b 100644
--- a/rdma/utils.c
+++ b/rdma/utils.c
@@ -352,6 +352,17 @@ static const enum mnl_attr_data_type 
nldev_policy[RDMA_NLDEV_ATTR_MAX] = {
        [RDMA_NLDEV_ATTR_RES_SUMMARY_ENTRY_NAME] = MNL_TYPE_NUL_STRING,
        [RDMA_NLDEV_ATTR_RES_SUMMARY_ENTRY_CURR] = MNL_TYPE_U64,
        [RDMA_NLDEV_ATTR_RES_SUMMARY_ENTRY_MAX] = MNL_TYPE_U64,
+       [RDMA_NLDEV_ATTR_RES_QP]                = MNL_TYPE_NESTED,
+       [RDMA_NLDEV_ATTR_RES_QP_ENTRY]          = MNL_TYPE_NESTED,
+       [RDMA_NLDEV_ATTR_RES_LQPN]      = MNL_TYPE_U32,
+       [RDMA_NLDEV_ATTR_RES_RQPN]      = MNL_TYPE_U32,
+       [RDMA_NLDEV_ATTR_RES_RQ_PSN]            = MNL_TYPE_U32,
+       [RDMA_NLDEV_ATTR_RES_SQ_PSN]            = MNL_TYPE_U32,
+       [RDMA_NLDEV_ATTR_RES_PATH_MIG_STATE]    = MNL_TYPE_U8,
+       [RDMA_NLDEV_ATTR_RES_TYPE]              = MNL_TYPE_U8,
+       [RDMA_NLDEV_ATTR_RES_STATE]             = MNL_TYPE_U8,
+       [RDMA_NLDEV_ATTR_RES_PID]               = MNL_TYPE_U32,
+       [RDMA_NLDEV_ATTR_RES_PID_COMM]  = MNL_TYPE_NUL_STRING,
 };
 
 int rd_attr_cb(const struct nlattr *attr, void *data)
-- 
2.15.1

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