rdma/res-mr.c

   1 // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
   2 /*
   3  * res-mr.c     RDMA tool
   4  * Authors:     Leon Romanovsky <leonro@mellanox.com>
   5  */
   6
   7 #include "res.h"
   8 #include <inttypes.h>
   9
  10 int res_mr_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_MR])
  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_MR];
  26
  27         mnl_attr_for_each_nested(nla_entry, nla_table) {
  28                 struct nlattr *nla_line[RDMA_NLDEV_ATTR_MAX] = {};
  29                 uint32_t rkey = 0, lkey = 0;
  30                 uint64_t iova = 0, mrlen;
  31                 char *comm = NULL;
  32                 uint32_t pdn = 0;
  33                 uint32_t mrn = 0;
  34                 uint32_t pid = 0;
  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_MRLEN] ||
  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_RKEY])
  48                         rkey = mnl_attr_get_u32(
  49                                 nla_line[RDMA_NLDEV_ATTR_RES_RKEY]);
  50                 if (nla_line[RDMA_NLDEV_ATTR_RES_LKEY])
  51                         lkey = mnl_attr_get_u32(
  52                                 nla_line[RDMA_NLDEV_ATTR_RES_LKEY]);
  53                 if (nla_line[RDMA_NLDEV_ATTR_RES_IOVA])
  54                         iova = mnl_attr_get_u64(
  55                                 nla_line[RDMA_NLDEV_ATTR_RES_IOVA]);
  56
  57                 mrlen = mnl_attr_get_u64(nla_line[RDMA_NLDEV_ATTR_RES_MRLEN]);
  58                 if (rd_check_is_filtered(rd, "mrlen", mrlen))
  59                         continue;
  60
  61                 if (nla_line[RDMA_NLDEV_ATTR_RES_PID]) {
  62                         pid = mnl_attr_get_u32(
  63                                 nla_line[RDMA_NLDEV_ATTR_RES_PID]);
  64                         comm = get_task_name(pid);
  65                 }
  66
  67                 if (rd_check_is_filtered(rd, "pid", pid)) {
  68                         free(comm);
  69                         continue;
  70                 }
  71
  72                 if (nla_line[RDMA_NLDEV_ATTR_RES_MRN])
  73                         mrn = mnl_attr_get_u32(
  74                                 nla_line[RDMA_NLDEV_ATTR_RES_MRN]);
  75                 if (rd_check_is_filtered(rd, "mrn", mrn))
  76                         continue;
  77
  78                 if (nla_line[RDMA_NLDEV_ATTR_RES_PDN])
  79                         pdn = mnl_attr_get_u32(
  80                                 nla_line[RDMA_NLDEV_ATTR_RES_PDN]);
  81                 if (rd_check_is_filtered(rd, "pdn", pdn))
  82                         continue;
  83
  84                 if (nla_line[RDMA_NLDEV_ATTR_RES_KERN_NAME])
  85                         /* discard const from mnl_attr_get_str */
  86                         comm = (char *)mnl_attr_get_str(
  87                                 nla_line[RDMA_NLDEV_ATTR_RES_KERN_NAME]);
  88
  89                 if (rd->json_output)
  90                         jsonw_start_array(rd->jw);
  91
  92                 print_dev(rd, idx, name);
  93                 if (nla_line[RDMA_NLDEV_ATTR_RES_RKEY])
  94                         print_key(rd, "rkey", rkey);
  95                 if (nla_line[RDMA_NLDEV_ATTR_RES_LKEY])
  96                         print_key(rd, "lkey", lkey);
  97                 if (nla_line[RDMA_NLDEV_ATTR_RES_IOVA])
  98                         print_key(rd, "iova", iova);
  99                 res_print_uint(rd, "mrlen", mrlen);
 100                 print_pid(rd, pid);
 101                 print_comm(rd, comm, nla_line);
 102
 103                 if (nla_line[RDMA_NLDEV_ATTR_RES_MRN])
 104                         res_print_uint(rd, "mrn", mrn);
 105
 106                 if (nla_line[RDMA_NLDEV_ATTR_RES_PDN])
 107                         res_print_uint(rd, "pdn", pdn);
 108
 109                 if (nla_line[RDMA_NLDEV_ATTR_RES_PID])
 110                         free(comm);
 111
 112                 print_driver_table(rd, nla_line[RDMA_NLDEV_ATTR_DRIVER]);
 113                 newline(rd);
 114         }
 115         return MNL_CB_OK;
 116 }
 117