test/debug/h2chains.c

   1 /*
   2  * H2CHAINS.C
   3  *
   4  * cc -I/usr/src/sys h2chains.c -o /usr/local/bin/h2chains -lkvm
   5  *
   6  * h2chains <hmpaddr>
   7  *
   8  * Copyright (c) 2017 The DragonFly Project.  All rights reserved.
   9  *
  10  * This code is derived from software contributed to The DragonFly Project
  11  * by Matthew Dillon <dillon@backplane.com>
  12  *
  13  * Redistribution and use in source and binary forms, with or without
  14  * modification, are permitted provided that the following conditions
  15  * are met:
  16  *
  17  * 1. Redistributions of source code must retain the above copyright
  18  *    notice, this list of conditions and the following disclaimer.
  19  * 2. Redistributions in binary form must reproduce the above copyright
  20  *    notice, this list of conditions and the following disclaimer in
  21  *    the documentation and/or other materials provided with the
  22  *    distribution.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  25  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  26  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  27  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
  28  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  29  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
  30  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  31  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  32  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  33  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  34  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  35  * SUCH DAMAGE.
  36  */
  37
  38 #include <sys/types.h>
  39 #include <sys/user.h>
  40 #include <vfs/hammer2/hammer2.h>
  41
  42 #include <vm/vm.h>
  43 #include <vm/vm_page.h>
  44 #include <vm/vm_kern.h>
  45 #include <vm/swap_pager.h>
  46 #include <vm/vnode_pager.h>
  47
  48 #include <stdio.h>
  49 #include <stdlib.h>
  50 #include <string.h>
  51 #include <fcntl.h>
  52 #include <kvm.h>
  53 #include <nlist.h>
  54 #include <getopt.h>
  55
  56 static void h2chainscan(kvm_t *kd, int tab, uintptr_t cp,
  57                         uintptr_t pcp, int pflags);
  58 static void kkread(kvm_t *kd, u_long addr, void *buf, size_t nbytes);
  59
  60 #if 0
  61 struct nlist Nl[] = {
  62     { "_rootnch" },
  63     { "_mountlist" },
  64     { NULL }
  65 };
  66 #endif
  67
  68 int
  69 main(int ac, char **av)
  70 {
  71     kvm_t *kd;
  72     const char *corefile = NULL;
  73     const char *sysfile = NULL;
  74     hammer2_dev_t hmp;
  75     uintptr_t base;
  76     uintptr_t cp;
  77     int ch;
  78
  79     while ((ch = getopt(ac, av, "M:N:")) != -1) {
  80         switch(ch) {
  81         case 'M':
  82             corefile = optarg;
  83             break;
  84         case 'N':
  85             sysfile = optarg;
  86             break;
  87         default:
  88             fprintf(stderr, "%s [-M core] [-N system]\n", av[0]);
  89             exit(1);
  90         }
  91     }
  92     ac -= optind;
  93     av += optind;
  94
  95     if ((kd = kvm_open(sysfile, corefile, NULL, O_RDONLY, "kvm:")) == NULL) {
  96         perror("kvm_open");
  97         exit(1);
  98     }
  99 #if 0
 100     if (kvm_nlist(kd, Nl) != 0) {
 101         perror("kvm_nlist");
 102         exit(1);
 103     }
 104     kkread(kd, Nl[0].n_value, &nch, sizeof(nch));
 105     kkread(kd, Nl[1].n_value, &list, sizeof(list));
 106 #endif
 107
 108     base = strtoul(av[0], NULL, 0);
 109
 110     kkread(kd, base, &hmp, sizeof(hmp));
 111     cp = (uintptr_t)hmp.vchain.core.rbtree.rbh_root;
 112     printf("VCHAIN %08x\n", hmp.vchain.flags);
 113     if (cp)
 114             h2chainscan(kd, 4, cp,
 115                         base + offsetof(struct hammer2_dev, vchain),
 116                         hmp.vchain.flags);
 117     printf("\n");
 118
 119     cp = (uintptr_t)hmp.fchain.core.rbtree.rbh_root;
 120     printf("FCHAIN %08x\n", hmp.fchain.flags);
 121     if (cp)
 122             h2chainscan(kd, 4, cp,
 123                         base + offsetof(struct hammer2_dev, fchain),
 124                         hmp.fchain.flags);
 125
 126     return 0;
 127 }
 128
 129 static
 130 void
 131 h2chainscan(kvm_t *kd, int tab, uintptr_t cp, uintptr_t pcp, int pflags)
 132 {
 133         hammer2_chain_t chain;
 134
 135         kkread(kd, cp, &chain, sizeof(chain));
 136         if (chain.rbnode.rbe_left)
 137                 h2chainscan(kd, tab, (uintptr_t)chain.rbnode.rbe_left,
 138                             pcp, pflags);
 139
 140         printf("%*.*s chain %p %08x type %02x ", tab, tab, "",
 141                 (void *)cp, chain.flags, chain.bref.type);
 142         if (chain.flags & HAMMER2_CHAIN_ONFLUSH)
 143                 printf("F");
 144         if (chain.flags & HAMMER2_CHAIN_MODIFIED)
 145                 printf("M");
 146         if (chain.flags & (HAMMER2_CHAIN_ONFLUSH|HAMMER2_CHAIN_MODIFIED)) {
 147                 if ((pflags & HAMMER2_CHAIN_ONFLUSH) == 0)
 148                         printf(" FAIL");
 149         }
 150         if ((uintptr_t)chain.parent != pcp)
 151                 printf(" FAIL2");
 152         printf("\n");
 153         if (chain.core.rbtree.rbh_root)
 154                 h2chainscan(kd, tab + 4,
 155                             (uintptr_t)chain.core.rbtree.rbh_root,
 156                             cp, chain.flags);
 157
 158         if (chain.rbnode.rbe_right)
 159                 h2chainscan(kd, tab, (uintptr_t)chain.rbnode.rbe_right,
 160                             pcp, pflags);
 161
 162 }
 163
 164 static void
 165 kkread(kvm_t *kd, u_long addr, void *buf, size_t nbytes)
 166 {
 167         if (kvm_read(kd, addr, buf, nbytes) != nbytes) {
 168                 perror("kvm_read");
 169                 exit(1);
 170         }
 171 }