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

   1 /*
   2  * Copyright (c) 2017 JingPiao Chen <chenjingpiao@gmail.com>
   3  * Copyright (c) 2017-2018 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 #ifndef AF_SMC
  33 # define XLAT_MACROS_ONLY
  34 # include "xlat/addrfams.h"
  35 # undef XLAT_MACROS_ONLY
  36 #endif
  37
  38 #include "netlink.h"
  39 #include "netlink_sock_diag.h"
  40 #include "nlattr.h"
  41 #include "print_fields.h"
  42
  43 #include <arpa/inet.h>
  44 #include <linux/smc_diag.h>
  45
  46 #include "xlat/smc_decl_codes.h"
  47 #include "xlat/smc_diag_attrs.h"
  48 #include "xlat/smc_diag_extended_flags.h"
  49 #include "xlat/smc_diag_mode.h"
  50 #include "xlat/smc_link_group_roles.h"
  51 #include "xlat/smc_states.h"
  52 #include "xlat/sock_shutdown_flags.h"
  53
  54 DECL_NETLINK_DIAG_DECODER(decode_smc_diag_req)
  55 {
  56         struct smc_diag_req req = { .diag_family = family };
  57         const size_t offset = sizeof(req.diag_family);
  58
  59         PRINT_FIELD_XVAL("{", req, diag_family, addrfams, "AF_???");
  60         tprints(", ");
  61         if (len >= sizeof(req)) {
  62                 if (!umoven_or_printaddr(tcp, addr + offset,
  63                                          sizeof(req) - offset,
  64                                          (void *) &req + offset)) {
  65                         PRINT_FIELD_FLAGS("", req, diag_ext,
  66                                           smc_diag_extended_flags,
  67                                           "1<<SMC_DIAG_\?\?\?-1");
  68                         /*
  69                          * AF_SMC protocol family socket handler
  70                          * keeping the AF_INET sock address.
  71                          */
  72                         PRINT_FIELD_INET_DIAG_SOCKID(", ", req, id, AF_INET);
  73                 }
  74         } else
  75                 tprints("...");
  76         tprints("}");
  77 }
  78
  79 static void
  80 print_smc_diag_cursor(const struct smc_diag_cursor *const cursor)
  81 {
  82         PRINT_FIELD_U("{", *cursor, reserved);
  83         PRINT_FIELD_U(", ", *cursor, wrap);
  84         PRINT_FIELD_U(", ", *cursor, count);
  85         tprints("}");
  86 }
  87
  88 # define PRINT_FIELD_SMC_DIAG_CURSOR(prefix_, where_, field_)           \
  89         do {                                                            \
  90                 tprintf("%s%s=", (prefix_), #field_);                   \
  91                 print_smc_diag_cursor(&(where_).field_);                \
  92         } while (0)
  93
  94 static bool
  95 decode_smc_diag_conninfo(struct tcb *const tcp,
  96                          const kernel_ulong_t addr,
  97                          const unsigned int len,
  98                          const void *const opaque_data)
  99 {
 100         struct smc_diag_conninfo cinfo;
 101
 102         if (len < sizeof(cinfo))
 103                 return false;
 104         if (umove_or_printaddr(tcp, addr, &cinfo))
 105                 return true;
 106
 107         PRINT_FIELD_U("{", cinfo, token);
 108         PRINT_FIELD_U(", ", cinfo, sndbuf_size);
 109         PRINT_FIELD_U(", ", cinfo, rmbe_size);
 110         PRINT_FIELD_U(", ", cinfo, peer_rmbe_size);
 111         PRINT_FIELD_SMC_DIAG_CURSOR(", ", cinfo, rx_prod);
 112         PRINT_FIELD_SMC_DIAG_CURSOR(", ", cinfo, rx_cons);
 113         PRINT_FIELD_SMC_DIAG_CURSOR(", ", cinfo, tx_prod);
 114         PRINT_FIELD_SMC_DIAG_CURSOR(", ", cinfo, tx_cons);
 115         PRINT_FIELD_0X(", ", cinfo, rx_prod_flags);
 116         PRINT_FIELD_0X(", ", cinfo, rx_conn_state_flags);
 117         PRINT_FIELD_0X(", ", cinfo, tx_prod_flags);
 118         PRINT_FIELD_0X(", ", cinfo, tx_conn_state_flags);
 119         PRINT_FIELD_SMC_DIAG_CURSOR(", ", cinfo, tx_prep);
 120         PRINT_FIELD_SMC_DIAG_CURSOR(", ", cinfo, tx_sent);
 121         PRINT_FIELD_SMC_DIAG_CURSOR(", ", cinfo, tx_fin);
 122         tprints("}");
 123
 124         return true;
 125 }
 126
 127 static bool
 128 decode_smc_diag_lgrinfo(struct tcb *const tcp,
 129                         const kernel_ulong_t addr,
 130                         const unsigned int len,
 131                         const void *const opaque_data)
 132 {
 133         struct smc_diag_lgrinfo linfo;
 134
 135         if (len < sizeof(linfo))
 136                 return false;
 137         if (umove_or_printaddr(tcp, addr, &linfo))
 138                 return true;
 139
 140         tprints("{lnk[0]={");
 141         PRINT_FIELD_U("", linfo.lnk[0], link_id);
 142         PRINT_FIELD_CSTRING(", ", linfo.lnk[0], ibname);
 143         PRINT_FIELD_U(", ", linfo.lnk[0], ibport);
 144         PRINT_FIELD_CSTRING(", ", linfo.lnk[0], gid);
 145         PRINT_FIELD_CSTRING(", ", linfo.lnk[0], peer_gid);
 146         PRINT_FIELD_XVAL("}, ", linfo, role, smc_link_group_roles, "SMC_???");
 147         tprints("}");
 148
 149         return true;
 150 }
 151
 152 static bool
 153 decode_smc_diag_shutdown(struct tcb *const tcp,
 154                          const kernel_ulong_t addr,
 155                          const unsigned int len,
 156                          const void *const opaque_data)
 157 {
 158         const struct decode_nla_xlat_opts opts = {
 159                 ARRSZ_PAIR(sock_shutdown_flags), "???_SHUTDOWN",
 160                 .size = 1,
 161         };
 162
 163         return decode_nla_flags(tcp, addr, len, &opts);
 164 }
 165
 166 static bool
 167 decode_smc_diag_dmbinfo(struct tcb *const tcp,
 168                         const kernel_ulong_t addr,
 169                         const unsigned int len,
 170                         const void *const opaque_data)
 171 {
 172         struct smcd_diag_dmbinfo dinfo;
 173
 174         if (len < sizeof(dinfo))
 175                 return false;
 176         if (umove_or_printaddr(tcp, addr, &dinfo))
 177                 return true;
 178
 179         PRINT_FIELD_U("{", dinfo, linkid);
 180         PRINT_FIELD_X(", ", dinfo, peer_gid);
 181         PRINT_FIELD_X(", ", dinfo, my_gid);
 182         PRINT_FIELD_X(", ", dinfo, token);
 183         PRINT_FIELD_X(", ", dinfo, peer_token);
 184         tprints("}");
 185
 186         return true;
 187 }
 188 static bool
 189 decode_smc_diag_fallback(struct tcb *const tcp,
 190                          const kernel_ulong_t addr,
 191                          const unsigned int len,
 192                          const void *const opaque_data)
 193 {
 194         struct smc_diag_fallback fb;
 195
 196         if (len < sizeof(fb))
 197                 return false;
 198         if (umove_or_printaddr(tcp, addr, &fb))
 199                 return true;
 200
 201         /*
 202          * We print them verbose since they are defined in a non-UAPI header,
 203          * net/smc/smc_clc.h
 204          */
 205         tprints("{reason=");
 206         printxval_search_ex(smc_decl_codes, fb.reason,
 207                             "SMC_CLC_DECL_???", XLAT_STYLE_VERBOSE);
 208         tprints(", peer_diagnosis=");
 209         printxval_search_ex(smc_decl_codes, fb.peer_diagnosis,
 210                             "SMC_CLC_DECL_???", XLAT_STYLE_VERBOSE);
 211         tprints("}");
 212
 213         return true;
 214 }
 215
 216 static const nla_decoder_t smc_diag_msg_nla_decoders[] = {
 217         [SMC_DIAG_CONNINFO]     = decode_smc_diag_conninfo,
 218         [SMC_DIAG_LGRINFO]      = decode_smc_diag_lgrinfo,
 219         [SMC_DIAG_SHUTDOWN]     = decode_smc_diag_shutdown,
 220         [SMC_DIAG_DMBINFO]      = decode_smc_diag_dmbinfo,
 221         [SMC_DIAG_FALLBACK]     = decode_smc_diag_fallback,
 222 };
 223
 224 DECL_NETLINK_DIAG_DECODER(decode_smc_diag_msg)
 225 {
 226         struct smc_diag_msg msg = { .diag_family = family };
 227         size_t offset = sizeof(msg.diag_family);
 228         bool decode_nla = false;
 229
 230         PRINT_FIELD_XVAL("{", msg, diag_family, addrfams, "AF_???");
 231         tprints(", ");
 232         if (len >= sizeof(msg)) {
 233                 if (!umoven_or_printaddr(tcp, addr + offset,
 234                                          sizeof(msg) - offset,
 235                                          (void *) &msg + offset)) {
 236                         PRINT_FIELD_XVAL("", msg, diag_state,
 237                                          smc_states, "SMC_???");
 238                         PRINT_FIELD_XVAL_INDEX(", ", msg, diag_fallback,
 239                                                smc_diag_mode,
 240                                                "SMC_DIAG_MODE_???");
 241                         PRINT_FIELD_U(", ", msg, diag_shutdown);
 242                         /*
 243                          * AF_SMC protocol family socket handler
 244                          * keeping the AF_INET sock address.
 245                          */
 246                         PRINT_FIELD_INET_DIAG_SOCKID(", ", msg, id, AF_INET);
 247                         PRINT_FIELD_U(", ", msg, diag_uid);
 248                         PRINT_FIELD_U(", ", msg, diag_inode);
 249                         decode_nla = true;
 250                 }
 251         } else
 252                 tprints("...");
 253         tprints("}");
 254
 255         offset = NLMSG_ALIGN(sizeof(msg));
 256         if (decode_nla && len > offset) {
 257                 tprints(", ");
 258                 decode_nlattr(tcp, addr + offset, len - offset,
 259                               smc_diag_attrs, "SMC_DIAG_???",
 260                               smc_diag_msg_nla_decoders,
 261                               ARRAY_SIZE(smc_diag_msg_nla_decoders), NULL);
 262         }
 263 }