rdma/res-pd.c

   1 // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
   2 /*
   3  * res-pd.c     RDMA tool
   4  * Authors:     Leon Romanovsky <leonro@mellanox.com>
   5  */
   6
   7 #include "res.h"
   8 #include <inttypes.h>
   9
  10 int res_pd_parse_cb(const struct nlmsghdr *nlh, void *data)
  11 {
  12         struct nlattr *tb[RDMA_NLDEV_ATTR_MAX] = {};
  13         struct nlattr *nla_table, *nla_entry;
  14         struct rd *rd = data;
  15         const char *name;
  16         uint32_t idx;
  17
  18         mnl_attr_parse(nlh, 0, rd_attr_cb, tb);
  19         if (!tb[RDMA_NLDEV_ATTR_DEV_INDEX] || !tb[RDMA_NLDEV_ATTR_DEV_NAME] ||
  20             !tb[RDMA_NLDEV_ATTR_RES_PD])
  21                 return MNL_CB_ERROR;
  22
  23         name = mnl_attr_get_str(tb[RDMA_NLDEV_ATTR_DEV_NAME]);
  24         idx = mnl_attr_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
  25         nla_table = tb[RDMA_NLDEV_ATTR_RES_PD];
  26
  27         mnl_attr_for_each_nested(nla_entry, nla_table) {
  28                 uint32_t local_dma_lkey = 0, unsafe_global_rkey = 0;
  29                 struct nlattr *nla_line[RDMA_NLDEV_ATTR_MAX] = {};
  30                 char *comm = NULL;
  31                 uint32_t ctxn = 0;
  32                 uint32_t pid = 0;
  33                 uint32_t pdn = 0;
  34                 uint64_t users;
  35                 int err;
  36
  37                 err = mnl_attr_parse_nested(nla_entry, rd_attr_cb, nla_line);
  38                 if (err != MNL_CB_OK)
  39                         return MNL_CB_ERROR;
  40
  41                 if (!nla_line[RDMA_NLDEV_ATTR_RES_USECNT] ||
  42                     (!nla_line[RDMA_NLDEV_ATTR_RES_PID] &&
  43                      !nla_line[RDMA_NLDEV_ATTR_RES_KERN_NAME])) {
  44                         return MNL_CB_ERROR;
  45                 }
  46
  47                 if (nla_line[RDMA_NLDEV_ATTR_RES_LOCAL_DMA_LKEY])
  48                         local_dma_lkey = mnl_attr_get_u32(
  49                                 nla_line[RDMA_NLDEV_ATTR_RES_LOCAL_DMA_LKEY]);
  50
  51                 users = mnl_attr_get_u64(nla_line[RDMA_NLDEV_ATTR_RES_USECNT]);
  52                 if (rd_check_is_filtered(rd, "users", users))
  53                         continue;
  54
  55                 if (nla_line[RDMA_NLDEV_ATTR_RES_UNSAFE_GLOBAL_RKEY])
  56                         unsafe_global_rkey = mnl_attr_get_u32(
  57                                 nla_line[RDMA_NLDEV_ATTR_RES_UNSAFE_GLOBAL_RKEY]);
  58
  59                 if (nla_line[RDMA_NLDEV_ATTR_RES_PID]) {
  60                         pid = mnl_attr_get_u32(
  61                                 nla_line[RDMA_NLDEV_ATTR_RES_PID]);
  62                         comm = get_task_name(pid);
  63                 }
  64
  65                 if (rd_check_is_filtered(rd, "pid", pid))
  66                         continue;
  67
  68                 if (nla_line[RDMA_NLDEV_ATTR_RES_CTXN])
  69                         ctxn = mnl_attr_get_u32(
  70                                 nla_line[RDMA_NLDEV_ATTR_RES_CTXN]);
  71
  72                 if (rd_check_is_filtered(rd, "ctxn", ctxn))
  73                         continue;
  74
  75                 if (nla_line[RDMA_NLDEV_ATTR_RES_PDN])
  76                         pdn = mnl_attr_get_u32(
  77                                 nla_line[RDMA_NLDEV_ATTR_RES_PDN]);
  78                 if (rd_check_is_filtered(rd, "pdn", pdn))
  79                         continue;
  80
  81                 if (nla_line[RDMA_NLDEV_ATTR_RES_KERN_NAME])
  82                         /* discard const from mnl_attr_get_str */
  83                         comm = (char *)mnl_attr_get_str(
  84                                 nla_line[RDMA_NLDEV_ATTR_RES_KERN_NAME]);
  85
  86                 if (rd->json_output)
  87                         jsonw_start_array(rd->jw);
  88
  89                 print_dev(rd, idx, name);
  90                 if (nla_line[RDMA_NLDEV_ATTR_RES_LOCAL_DMA_LKEY])
  91                         print_key(rd, "local_dma_lkey", local_dma_lkey);
  92                 res_print_uint(rd, "users", users);
  93                 if (nla_line[RDMA_NLDEV_ATTR_RES_UNSAFE_GLOBAL_RKEY])
  94                         print_key(rd, "unsafe_global_rkey", unsafe_global_rkey);
  95                 res_print_uint(rd, "pid", pid);
  96                 print_comm(rd, comm, nla_line);
  97                 if (nla_line[RDMA_NLDEV_ATTR_RES_CTXN])
  98                         res_print_uint(rd, "ctxn", ctxn);
  99
 100                 if (nla_line[RDMA_NLDEV_ATTR_RES_PDN])
 101                         res_print_uint(rd, "pdn", pdn);
 102
 103                 if (nla_line[RDMA_NLDEV_ATTR_RES_PID])
 104                         free(comm);
 105
 106                 print_driver_table(rd, nla_line[RDMA_NLDEV_ATTR_DRIVER]);
 107                 newline(rd);
 108         }
 109         return MNL_CB_OK;
 110 }