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_line)
  12 {
  13         uint32_t local_dma_lkey = 0, unsafe_global_rkey = 0;
  14         char *comm = NULL;
  15         uint32_t ctxn = 0;
  16         uint32_t pid = 0;
  17         uint32_t pdn = 0;
  18         uint64_t users;
  19
  20         if (!nla_line[RDMA_NLDEV_ATTR_RES_USECNT] ||
  21             (!nla_line[RDMA_NLDEV_ATTR_RES_PID] &&
  22              !nla_line[RDMA_NLDEV_ATTR_RES_KERN_NAME])) {
  23                 return MNL_CB_ERROR;
  24         }
  25
  26         if (nla_line[RDMA_NLDEV_ATTR_RES_LOCAL_DMA_LKEY])
  27                 local_dma_lkey = mnl_attr_get_u32(
  28                         nla_line[RDMA_NLDEV_ATTR_RES_LOCAL_DMA_LKEY]);
  29
  30         users = mnl_attr_get_u64(nla_line[RDMA_NLDEV_ATTR_RES_USECNT]);
  31         if (rd_is_filtered_attr(rd, "users", users,
  32                                 nla_line[RDMA_NLDEV_ATTR_RES_USECNT]))
  33                 goto out;
  34
  35         if (nla_line[RDMA_NLDEV_ATTR_RES_UNSAFE_GLOBAL_RKEY])
  36                 unsafe_global_rkey = mnl_attr_get_u32(
  37                         nla_line[RDMA_NLDEV_ATTR_RES_UNSAFE_GLOBAL_RKEY]);
  38
  39         if (nla_line[RDMA_NLDEV_ATTR_RES_PID]) {
  40                 pid = mnl_attr_get_u32(nla_line[RDMA_NLDEV_ATTR_RES_PID]);
  41                 comm = get_task_name(pid);
  42         }
  43
  44         if (rd_is_filtered_attr(rd, "pid", pid,
  45                                 nla_line[RDMA_NLDEV_ATTR_RES_PID]))
  46                 goto out;
  47
  48         if (nla_line[RDMA_NLDEV_ATTR_RES_CTXN])
  49                 ctxn = mnl_attr_get_u32(nla_line[RDMA_NLDEV_ATTR_RES_CTXN]);
  50
  51         if (rd_is_filtered_attr(rd, "ctxn", ctxn,
  52                                 nla_line[RDMA_NLDEV_ATTR_RES_CTXN]))
  53                 goto out;
  54
  55         if (nla_line[RDMA_NLDEV_ATTR_RES_PDN])
  56                 pdn = mnl_attr_get_u32(nla_line[RDMA_NLDEV_ATTR_RES_PDN]);
  57         if (rd_is_filtered_attr(rd, "pdn", pdn,
  58                                 nla_line[RDMA_NLDEV_ATTR_RES_PDN]))
  59                 goto out;
  60
  61         if (nla_line[RDMA_NLDEV_ATTR_RES_KERN_NAME])
  62                 /* discard const from mnl_attr_get_str */
  63                 comm = (char *)mnl_attr_get_str(
  64                         nla_line[RDMA_NLDEV_ATTR_RES_KERN_NAME]);
  65
  66         if (rd->json_output)
  67                 jsonw_start_array(rd->jw);
  68
  69         print_dev(rd, idx, name);
  70         res_print_uint(rd, "pdn", pdn, nla_line[RDMA_NLDEV_ATTR_RES_PDN]);
  71         print_key(rd, "local_dma_lkey", local_dma_lkey,
  72                   nla_line[RDMA_NLDEV_ATTR_RES_LOCAL_DMA_LKEY]);
  73         res_print_uint(rd, "users", users,
  74                        nla_line[RDMA_NLDEV_ATTR_RES_USECNT]);
  75         print_key(rd, "unsafe_global_rkey", unsafe_global_rkey,
  76                   nla_line[RDMA_NLDEV_ATTR_RES_UNSAFE_GLOBAL_RKEY]);
  77         res_print_uint(rd, "ctxn", ctxn, nla_line[RDMA_NLDEV_ATTR_RES_CTXN]);
  78         res_print_uint(rd, "pid", pid, nla_line[RDMA_NLDEV_ATTR_RES_PID]);
  79         print_comm(rd, comm, nla_line);
  80
  81         print_driver_table(rd, nla_line[RDMA_NLDEV_ATTR_DRIVER]);
  82         newline(rd);
  83
  84 out:    if (nla_line[RDMA_NLDEV_ATTR_RES_PID])
  85                 free(comm);
  86         return MNL_CB_OK;
  87 }
  88
  89 int res_pd_idx_parse_cb(const struct nlmsghdr *nlh, void *data)
  90 {
  91         struct nlattr *tb[RDMA_NLDEV_ATTR_MAX] = {};
  92         struct rd *rd = data;
  93         const char *name;
  94         uint32_t idx;
  95
  96         mnl_attr_parse(nlh, 0, rd_attr_cb, tb);
  97         if (!tb[RDMA_NLDEV_ATTR_DEV_INDEX] || !tb[RDMA_NLDEV_ATTR_DEV_NAME])
  98                 return MNL_CB_ERROR;
  99
 100         name = mnl_attr_get_str(tb[RDMA_NLDEV_ATTR_DEV_NAME]);
 101         idx = mnl_attr_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
 102
 103         return res_pd_line(rd, name, idx, tb);
 104 }
 105
 106 int res_pd_parse_cb(const struct nlmsghdr *nlh, void *data)
 107 {
 108         struct nlattr *tb[RDMA_NLDEV_ATTR_MAX] = {};
 109         struct nlattr *nla_table, *nla_entry;
 110         struct rd *rd = data;
 111         int ret = MNL_CB_OK;
 112         const char *name;
 113         uint32_t idx;
 114
 115         mnl_attr_parse(nlh, 0, rd_attr_cb, tb);
 116         if (!tb[RDMA_NLDEV_ATTR_DEV_INDEX] || !tb[RDMA_NLDEV_ATTR_DEV_NAME] ||
 117             !tb[RDMA_NLDEV_ATTR_RES_PD])
 118                 return MNL_CB_ERROR;
 119
 120         name = mnl_attr_get_str(tb[RDMA_NLDEV_ATTR_DEV_NAME]);
 121         idx = mnl_attr_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
 122         nla_table = tb[RDMA_NLDEV_ATTR_RES_PD];
 123
 124         mnl_attr_for_each_nested(nla_entry, nla_table) {
 125                 struct nlattr *nla_line[RDMA_NLDEV_ATTR_MAX] = {};
 126
 127                 ret = mnl_attr_parse_nested(nla_entry, rd_attr_cb, nla_line);
 128                 if (ret != MNL_CB_OK)
 129                         break;
 130
 131                 ret = res_pd_line(rd, name, idx, nla_line);
 132                 if (ret != MNL_CB_OK)
 133                         break;
 134         }
 135         return ret;
 136 }