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 static int res_pd_line(struct rd *rd, const char *name, int idx,
  11                        struct nlattr *nla_entry)
  12 {
  13         uint32_t local_dma_lkey = 0, unsafe_global_rkey = 0;
  14         struct nlattr *nla_line[RDMA_NLDEV_ATTR_MAX] = {};
  15         char *comm = NULL;
  16         uint32_t ctxn = 0;
  17         uint32_t pid = 0;
  18         uint32_t pdn = 0;
  19         uint64_t users;
  20         int err;
  21
  22         err = mnl_attr_parse_nested(nla_entry, rd_attr_cb, nla_line);
  23         if (err != MNL_CB_OK)
  24                 return MNL_CB_ERROR;
  25
  26         if (!nla_line[RDMA_NLDEV_ATTR_RES_USECNT] ||
  27             (!nla_line[RDMA_NLDEV_ATTR_RES_PID] &&
  28              !nla_line[RDMA_NLDEV_ATTR_RES_KERN_NAME])) {
  29                 return MNL_CB_ERROR;
  30         }
  31
  32         if (nla_line[RDMA_NLDEV_ATTR_RES_LOCAL_DMA_LKEY])
  33                 local_dma_lkey = mnl_attr_get_u32(
  34                         nla_line[RDMA_NLDEV_ATTR_RES_LOCAL_DMA_LKEY]);
  35
  36         users = mnl_attr_get_u64(nla_line[RDMA_NLDEV_ATTR_RES_USECNT]);
  37         if (rd_check_is_filtered(rd, "users", users))
  38                 goto out;
  39
  40         if (nla_line[RDMA_NLDEV_ATTR_RES_UNSAFE_GLOBAL_RKEY])
  41                 unsafe_global_rkey = mnl_attr_get_u32(
  42                         nla_line[RDMA_NLDEV_ATTR_RES_UNSAFE_GLOBAL_RKEY]);
  43
  44         if (nla_line[RDMA_NLDEV_ATTR_RES_PID]) {
  45                 pid = mnl_attr_get_u32(nla_line[RDMA_NLDEV_ATTR_RES_PID]);
  46                 comm = get_task_name(pid);
  47         }
  48
  49         if (rd_check_is_filtered(rd, "pid", pid))
  50                 goto out;
  51
  52         if (nla_line[RDMA_NLDEV_ATTR_RES_CTXN])
  53                 ctxn = mnl_attr_get_u32(nla_line[RDMA_NLDEV_ATTR_RES_CTXN]);
  54
  55         if (rd_check_is_filtered(rd, "ctxn", ctxn))
  56                 goto out;
  57
  58         if (nla_line[RDMA_NLDEV_ATTR_RES_PDN])
  59                 pdn = mnl_attr_get_u32(nla_line[RDMA_NLDEV_ATTR_RES_PDN]);
  60         if (rd_check_is_filtered(rd, "pdn", pdn))
  61                 goto out;
  62
  63         if (nla_line[RDMA_NLDEV_ATTR_RES_KERN_NAME])
  64                 /* discard const from mnl_attr_get_str */
  65                 comm = (char *)mnl_attr_get_str(
  66                         nla_line[RDMA_NLDEV_ATTR_RES_KERN_NAME]);
  67
  68         if (rd->json_output)
  69                 jsonw_start_array(rd->jw);
  70
  71         print_dev(rd, idx, name);
  72         if (nla_line[RDMA_NLDEV_ATTR_RES_LOCAL_DMA_LKEY])
  73                 print_key(rd, "local_dma_lkey", local_dma_lkey);
  74         res_print_uint(rd, "users", users);
  75         if (nla_line[RDMA_NLDEV_ATTR_RES_UNSAFE_GLOBAL_RKEY])
  76                 print_key(rd, "unsafe_global_rkey", unsafe_global_rkey);
  77         res_print_uint(rd, "pid", pid);
  78         print_comm(rd, comm, nla_line);
  79         if (nla_line[RDMA_NLDEV_ATTR_RES_CTXN])
  80                 res_print_uint(rd, "ctxn", ctxn);
  81
  82         if (nla_line[RDMA_NLDEV_ATTR_RES_PDN])
  83                 res_print_uint(rd, "pdn", pdn);
  84
  85         print_driver_table(rd, nla_line[RDMA_NLDEV_ATTR_DRIVER]);
  86         newline(rd);
  87
  88 out:    if (nla_line[RDMA_NLDEV_ATTR_RES_PID])
  89                 free(comm);
  90         return MNL_CB_OK;
  91 }
  92
  93 int res_pd_parse_cb(const struct nlmsghdr *nlh, void *data)
  94 {
  95         struct nlattr *tb[RDMA_NLDEV_ATTR_MAX] = {};
  96         struct nlattr *nla_table, *nla_entry;
  97         struct rd *rd = data;
  98         int ret = MNL_CB_OK;
  99         const char *name;
 100         uint32_t idx;
 101
 102         mnl_attr_parse(nlh, 0, rd_attr_cb, tb);
 103         if (!tb[RDMA_NLDEV_ATTR_DEV_INDEX] || !tb[RDMA_NLDEV_ATTR_DEV_NAME] ||
 104             !tb[RDMA_NLDEV_ATTR_RES_PD])
 105                 return MNL_CB_ERROR;
 106
 107         name = mnl_attr_get_str(tb[RDMA_NLDEV_ATTR_DEV_NAME]);
 108         idx = mnl_attr_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
 109         nla_table = tb[RDMA_NLDEV_ATTR_RES_PD];
 110
 111         mnl_attr_for_each_nested(nla_entry, nla_table) {
 112                 ret = res_pd_line(rd, name, idx, nla_entry);
 113
 114                 if (ret != MNL_CB_OK)
 115                         break;
 116         }
 117         return ret;
 118 }