usr/src/cmd/mdb/common/modules/genunix/netstack.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  * Copyright (c) 2012, Joyent, Inc.  All rights reserved.
  25  */
  26
  27 #include <mdb/mdb_modapi.h>
  28 #include <mdb/mdb_ks.h>
  29 #include <mdb/mdb_ctf.h>
  30 #include <sys/types.h>
  31 #include <sys/netstack.h>
  32
  33 int
  34 netstack_walk_init(mdb_walk_state_t *wsp)
  35 {
  36         GElf_Sym sym;
  37         uintptr_t addr;
  38
  39         if (mdb_lookup_by_name("netstack_head", &sym) == -1) {
  40                 mdb_warn("couldn't find netstack_head");
  41                 return (WALK_ERR);
  42         }
  43         addr = (uintptr_t)sym.st_value;
  44
  45         if (mdb_vread(&wsp->walk_addr, sizeof (wsp->walk_addr), addr) == -1) {
  46                 mdb_warn("failed to read address of initial netstack "
  47                     "at %p", addr);
  48                 return (WALK_ERR);
  49         }
  50         return (WALK_NEXT);
  51 }
  52
  53 int
  54 netstack_walk_step(mdb_walk_state_t *wsp)
  55 {
  56         int status;
  57         netstack_t nss;
  58
  59         if (wsp->walk_addr == (uintptr_t)NULL)
  60                 return (WALK_DONE);
  61
  62         if (mdb_vread(&nss, sizeof (netstack_t), wsp->walk_addr) == -1) {
  63                 mdb_warn("failed to read netstack at %p", wsp->walk_addr);
  64                 return (WALK_ERR);
  65         }
  66
  67         status = wsp->walk_callback(wsp->walk_addr, &nss,
  68             wsp->walk_cbdata);
  69
  70         if (status != WALK_NEXT)
  71                 return (status);
  72
  73         wsp->walk_addr = (uintptr_t)nss.netstack_next;
  74         return (status);
  75 }
  76
  77 /*ARGSUSED*/
  78 int
  79 netstack(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
  80 {
  81         netstack_t nss;
  82         uint_t quiet = FALSE;
  83         uint_t verbose = FALSE;
  84
  85         if (!(flags & DCMD_ADDRSPEC)) {
  86                 if (mdb_walk_dcmd("genunix`netstack", "genunix`netstack",
  87                     argc, argv) == -1) {
  88                         mdb_warn("failed to walk netstack");
  89                         return (DCMD_ERR);
  90                 }
  91                 return (DCMD_OK);
  92         }
  93         if (mdb_getopts(argc, argv,
  94             'v', MDB_OPT_SETBITS, TRUE, &verbose,
  95             'q', MDB_OPT_SETBITS, TRUE, &quiet,
  96             NULL) != argc)
  97                 return (DCMD_USAGE);
  98
  99         if (DCMD_HDRSPEC(flags) && !quiet) {
 100                 mdb_printf("%?s %-7s %6s\n",
 101                     "ADDR", "STACKID", "FLAGS");
 102         }
 103
 104         if (mdb_vread(&nss, sizeof (nss), addr) == -1) {
 105                 mdb_warn("couldn't read netstack at %p", addr);
 106                 return (DCMD_ERR);
 107         }
 108
 109         /*
 110          * Options are specified for filtering, so If any option is specified on
 111          * the command line, just print address and exit.
 112          */
 113         if (quiet) {
 114                 mdb_printf("%0?p\n", addr);
 115                 return (DCMD_OK);
 116         }
 117
 118         mdb_printf("%0?p %6d    %06x\n",
 119             addr, nss.netstack_stackid, nss.netstack_flags);
 120
 121         return (DCMD_OK);
 122 }
 123
 124 static int
 125 netstackid_lookup_cb(uintptr_t addr, const netstack_t *ns, void *arg)
 126 {
 127         netstackid_t nid = *(uintptr_t *)arg;
 128         if (ns->netstack_stackid == nid)
 129                 mdb_printf("%p\n", addr);
 130
 131         return (WALK_NEXT);
 132 }
 133
 134 /*ARGSUSED*/
 135 int
 136 netstackid2netstack(uintptr_t addr, uint_t flags, int argc,
 137     const mdb_arg_t *argv)
 138 {
 139         if (!(flags & DCMD_ADDRSPEC) || argc != 0)
 140                 return (DCMD_USAGE);
 141
 142         if (mdb_walk("netstack", (mdb_walk_cb_t)netstackid_lookup_cb, &addr) ==
 143             -1) {
 144                 mdb_warn("failed to walk zone");
 145                 return (DCMD_ERR);
 146         }
 147
 148         return (DCMD_OK);
 149 }