granicus.if.org Git - strace/blob - netlink_smc_diag.c

   1 /*
   2  * Copyright (c) 2017 JingPiao Chen <chenjingpiao@gmail.com>
   3  * Copyright (c) 2017 The strace developers.
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  * 3. The name of the author may not be used to endorse or promote products
  15  *    derived from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  */
  28
  29 #include "defs.h"
  30 #include <sys/socket.h>
  31
  32 #ifdef AF_SMC
  33
  34 # include "netlink.h"
  35 # include "netlink_sock_diag.h"
  36 # include "nlattr.h"
  37 # include "print_fields.h"
  38
  39 # include <arpa/inet.h>
  40 # include <linux/smc_diag.h>
  41
  42 # include "xlat/smc_diag_attrs.h"
  43 # include "xlat/smc_diag_extended_flags.h"
  44 # include "xlat/smc_link_group_roles.h"
  45 # include "xlat/smc_states.h"
  46
  47 DECL_NETLINK_DIAG_DECODER(decode_smc_diag_req)
  48 {
  49         struct smc_diag_req req = { .diag_family = family };
  50         const size_t offset = sizeof(req.diag_family);
  51
  52         PRINT_FIELD_XVAL("{", req, diag_family, addrfams, "AF_???");
  53         tprints(", ");
  54         if (len >= sizeof(req)) {
  55                 if (!umoven_or_printaddr(tcp, addr + offset,
  56                                          sizeof(req) - offset,
  57                                          (void *) &req + offset)) {
  58                         PRINT_FIELD_FLAGS("", req, diag_ext,
  59                                           smc_diag_extended_flags,
  60                                           "1<<SMC_DIAG_\?\?\?-1");
  61                         /*
  62                          * AF_SMC protocol family socket handler
  63                          * keeping the AF_INET sock address.
  64                          */
  65                         PRINT_FIELD_INET_DIAG_SOCKID(", ", req, id, AF_INET);
  66                 }
  67         } else
  68                 tprints("...");
  69         tprints("}");
  70 }
  71
  72 static void
  73 print_smc_diag_cursor(const struct smc_diag_cursor *const cursor)
  74 {
  75         PRINT_FIELD_U("{", *cursor, reserved);
  76         PRINT_FIELD_U(", ", *cursor, wrap);
  77         PRINT_FIELD_U(", ", *cursor, count);
  78         tprints("}");
  79 }
  80
  81 # define PRINT_FIELD_SMC_DIAG_CURSOR(prefix_, where_, field_)           \
  82         do {                                                            \
  83                 tprintf("%s%s=", (prefix_), #field_);                   \
  84                 print_smc_diag_cursor(&(where_).field_);                \
  85         } while (0)
  86
  87 static bool
  88 decode_smc_diag_conninfo(struct tcb *const tcp,
  89                          const kernel_ulong_t addr,
  90                          const unsigned int len,
  91                          const void *const opaque_data)
  92 {
  93         struct smc_diag_conninfo cinfo;
  94
  95         if (len < sizeof(cinfo))
  96                 return false;
  97         if (umove_or_printaddr(tcp, addr, &cinfo))
  98                 return true;
  99
 100         PRINT_FIELD_U("{", cinfo, token);
 101         PRINT_FIELD_U(", ", cinfo, sndbuf_size);
 102         PRINT_FIELD_U(", ", cinfo, rmbe_size);
 103         PRINT_FIELD_U(", ", cinfo, peer_rmbe_size);
 104         PRINT_FIELD_SMC_DIAG_CURSOR(", ", cinfo, rx_prod);
 105         PRINT_FIELD_SMC_DIAG_CURSOR(", ", cinfo, rx_cons);
 106         PRINT_FIELD_SMC_DIAG_CURSOR(", ", cinfo, tx_prod);
 107         PRINT_FIELD_SMC_DIAG_CURSOR(", ", cinfo, tx_cons);
 108         PRINT_FIELD_0X(", ", cinfo, rx_prod_flags);
 109         PRINT_FIELD_0X(", ", cinfo, rx_conn_state_flags);
 110         PRINT_FIELD_0X(", ", cinfo, tx_prod_flags);
 111         PRINT_FIELD_0X(", ", cinfo, tx_conn_state_flags);
 112         PRINT_FIELD_SMC_DIAG_CURSOR(", ", cinfo, tx_prep);
 113         PRINT_FIELD_SMC_DIAG_CURSOR(", ", cinfo, tx_sent);
 114         PRINT_FIELD_SMC_DIAG_CURSOR(", ", cinfo, tx_fin);
 115         tprints("}");
 116
 117         return true;
 118 }
 119
 120 static bool
 121 decode_smc_diag_lgrinfo(struct tcb *const tcp,
 122                         const kernel_ulong_t addr,
 123                         const unsigned int len,
 124                         const void *const opaque_data)
 125 {
 126         struct smc_diag_lgrinfo linfo;
 127
 128         if (len < sizeof(linfo))
 129                 return false;
 130         if (umove_or_printaddr(tcp, addr, &linfo))
 131                 return true;
 132
 133         tprints("{lnk[0]={");
 134         PRINT_FIELD_U("", linfo.lnk[0], link_id);
 135         PRINT_FIELD_CSTRING(", ", linfo.lnk[0], ibname);
 136         PRINT_FIELD_U(", ", linfo.lnk[0], ibport);
 137         PRINT_FIELD_CSTRING(", ", linfo.lnk[0], gid);
 138         PRINT_FIELD_CSTRING(", ", linfo.lnk[0], peer_gid);
 139         PRINT_FIELD_XVAL("}, ", linfo, role, smc_link_group_roles, "SMC_???");
 140         tprints("}");
 141
 142         return true;
 143 }
 144
 145 static const nla_decoder_t smc_diag_msg_nla_decoders[] = {
 146         [SMC_DIAG_CONNINFO]     = decode_smc_diag_conninfo,
 147         [SMC_DIAG_LGRINFO]      = decode_smc_diag_lgrinfo,
 148         [SMC_DIAG_SHUTDOWN]     = decode_nla_u8
 149 };
 150
 151 DECL_NETLINK_DIAG_DECODER(decode_smc_diag_msg)
 152 {
 153         struct smc_diag_msg msg = { .diag_family = family };
 154         size_t offset = sizeof(msg.diag_family);
 155         bool decode_nla = false;
 156
 157         PRINT_FIELD_XVAL("{", msg, diag_family, addrfams, "AF_???");
 158         tprints(", ");
 159         if (len >= sizeof(msg)) {
 160                 if (!umoven_or_printaddr(tcp, addr + offset,
 161                                          sizeof(msg) - offset,
 162                                          (void *) &msg + offset)) {
 163                         PRINT_FIELD_XVAL("", msg, diag_state,
 164                                          smc_states, "SMC_???");
 165                         PRINT_FIELD_U(", ", msg, diag_fallback);
 166                         PRINT_FIELD_U(", ", msg, diag_shutdown);
 167                         /*
 168                          * AF_SMC protocol family socket handler
 169                          * keeping the AF_INET sock address.
 170                          */
 171                         PRINT_FIELD_INET_DIAG_SOCKID(", ", msg, id, AF_INET);
 172                         PRINT_FIELD_U(", ", msg, diag_uid);
 173                         PRINT_FIELD_U(", ", msg, diag_inode);
 174                         decode_nla = true;
 175                 }
 176         } else
 177                 tprints("...");
 178         tprints("}");
 179
 180         offset = NLMSG_ALIGN(sizeof(msg));
 181         if (decode_nla && len > offset) {
 182                 tprints(", ");
 183                 decode_nlattr(tcp, addr + offset, len - offset,
 184                               smc_diag_attrs, "SMC_DIAG_???",
 185                               smc_diag_msg_nla_decoders,
 186                               ARRAY_SIZE(smc_diag_msg_nla_decoders), NULL);
 187         }
 188 }
 189
 190 #endif /* AF_SMC */