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 #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_diag_attrs.h"
  47 #include "xlat/smc_diag_extended_flags.h"
  48 #include "xlat/smc_link_group_roles.h"
  49 #include "xlat/smc_states.h"
  50
  51 DECL_NETLINK_DIAG_DECODER(decode_smc_diag_req)
  52 {
  53         struct smc_diag_req req = { .diag_family = family };
  54         const size_t offset = sizeof(req.diag_family);
  55
  56         PRINT_FIELD_XVAL("{", req, diag_family, addrfams, "AF_???");
  57         tprints(", ");
  58         if (len >= sizeof(req)) {
  59                 if (!umoven_or_printaddr(tcp, addr + offset,
  60                                          sizeof(req) - offset,
  61                                          (void *) &req + offset)) {
  62                         PRINT_FIELD_FLAGS("", req, diag_ext,
  63                                           smc_diag_extended_flags,
  64                                           "1<<SMC_DIAG_\?\?\?-1");
  65                         /*
  66                          * AF_SMC protocol family socket handler
  67                          * keeping the AF_INET sock address.
  68                          */
  69                         PRINT_FIELD_INET_DIAG_SOCKID(", ", req, id, AF_INET);
  70                 }
  71         } else
  72                 tprints("...");
  73         tprints("}");
  74 }
  75
  76 static void
  77 print_smc_diag_cursor(const struct smc_diag_cursor *const cursor)
  78 {
  79         PRINT_FIELD_U("{", *cursor, reserved);
  80         PRINT_FIELD_U(", ", *cursor, wrap);
  81         PRINT_FIELD_U(", ", *cursor, count);
  82         tprints("}");
  83 }
  84
  85 # define PRINT_FIELD_SMC_DIAG_CURSOR(prefix_, where_, field_)           \
  86         do {                                                            \
  87                 tprintf("%s%s=", (prefix_), #field_);                   \
  88                 print_smc_diag_cursor(&(where_).field_);                \
  89         } while (0)
  90
  91 static bool
  92 decode_smc_diag_conninfo(struct tcb *const tcp,
  93                          const kernel_ulong_t addr,
  94                          const unsigned int len,
  95                          const void *const opaque_data)
  96 {
  97         struct smc_diag_conninfo cinfo;
  98
  99         if (len < sizeof(cinfo))
 100                 return false;
 101         if (umove_or_printaddr(tcp, addr, &cinfo))
 102                 return true;
 103
 104         PRINT_FIELD_U("{", cinfo, token);
 105         PRINT_FIELD_U(", ", cinfo, sndbuf_size);
 106         PRINT_FIELD_U(", ", cinfo, rmbe_size);
 107         PRINT_FIELD_U(", ", cinfo, peer_rmbe_size);
 108         PRINT_FIELD_SMC_DIAG_CURSOR(", ", cinfo, rx_prod);
 109         PRINT_FIELD_SMC_DIAG_CURSOR(", ", cinfo, rx_cons);
 110         PRINT_FIELD_SMC_DIAG_CURSOR(", ", cinfo, tx_prod);
 111         PRINT_FIELD_SMC_DIAG_CURSOR(", ", cinfo, tx_cons);
 112         PRINT_FIELD_0X(", ", cinfo, rx_prod_flags);
 113         PRINT_FIELD_0X(", ", cinfo, rx_conn_state_flags);
 114         PRINT_FIELD_0X(", ", cinfo, tx_prod_flags);
 115         PRINT_FIELD_0X(", ", cinfo, tx_conn_state_flags);
 116         PRINT_FIELD_SMC_DIAG_CURSOR(", ", cinfo, tx_prep);
 117         PRINT_FIELD_SMC_DIAG_CURSOR(", ", cinfo, tx_sent);
 118         PRINT_FIELD_SMC_DIAG_CURSOR(", ", cinfo, tx_fin);
 119         tprints("}");
 120
 121         return true;
 122 }
 123
 124 static bool
 125 decode_smc_diag_lgrinfo(struct tcb *const tcp,
 126                         const kernel_ulong_t addr,
 127                         const unsigned int len,
 128                         const void *const opaque_data)
 129 {
 130         struct smc_diag_lgrinfo linfo;
 131
 132         if (len < sizeof(linfo))
 133                 return false;
 134         if (umove_or_printaddr(tcp, addr, &linfo))
 135                 return true;
 136
 137         tprints("{lnk[0]={");
 138         PRINT_FIELD_U("", linfo.lnk[0], link_id);
 139         PRINT_FIELD_CSTRING(", ", linfo.lnk[0], ibname);
 140         PRINT_FIELD_U(", ", linfo.lnk[0], ibport);
 141         PRINT_FIELD_CSTRING(", ", linfo.lnk[0], gid);
 142         PRINT_FIELD_CSTRING(", ", linfo.lnk[0], peer_gid);
 143         PRINT_FIELD_XVAL("}, ", linfo, role, smc_link_group_roles, "SMC_???");
 144         tprints("}");
 145
 146         return true;
 147 }
 148
 149 static const nla_decoder_t smc_diag_msg_nla_decoders[] = {
 150         [SMC_DIAG_CONNINFO]     = decode_smc_diag_conninfo,
 151         [SMC_DIAG_LGRINFO]      = decode_smc_diag_lgrinfo,
 152         [SMC_DIAG_SHUTDOWN]     = decode_nla_u8
 153 };
 154
 155 DECL_NETLINK_DIAG_DECODER(decode_smc_diag_msg)
 156 {
 157         struct smc_diag_msg msg = { .diag_family = family };
 158         size_t offset = sizeof(msg.diag_family);
 159         bool decode_nla = false;
 160
 161         PRINT_FIELD_XVAL("{", msg, diag_family, addrfams, "AF_???");
 162         tprints(", ");
 163         if (len >= sizeof(msg)) {
 164                 if (!umoven_or_printaddr(tcp, addr + offset,
 165                                          sizeof(msg) - offset,
 166                                          (void *) &msg + offset)) {
 167                         PRINT_FIELD_XVAL("", msg, diag_state,
 168                                          smc_states, "SMC_???");
 169                         PRINT_FIELD_U(", ", msg, diag_fallback);
 170                         PRINT_FIELD_U(", ", msg, diag_shutdown);
 171                         /*
 172                          * AF_SMC protocol family socket handler
 173                          * keeping the AF_INET sock address.
 174                          */
 175                         PRINT_FIELD_INET_DIAG_SOCKID(", ", msg, id, AF_INET);
 176                         PRINT_FIELD_U(", ", msg, diag_uid);
 177                         PRINT_FIELD_U(", ", msg, diag_inode);
 178                         decode_nla = true;
 179                 }
 180         } else
 181                 tprints("...");
 182         tprints("}");
 183
 184         offset = NLMSG_ALIGN(sizeof(msg));
 185         if (decode_nla && len > offset) {
 186                 tprints(", ");
 187                 decode_nlattr(tcp, addr + offset, len - offset,
 188                               smc_diag_attrs, "SMC_DIAG_???",
 189                               smc_diag_msg_nla_decoders,
 190                               ARRAY_SIZE(smc_diag_msg_nla_decoders), NULL);
 191         }
 192 }