4 * cc -I/usr/src/sys h2chains.c -o ~/bin/h2chains -lkvm
8 * Copyright (c) 2017 The DragonFly Project. All rights reserved.
10 * This code is derived from software contributed to The DragonFly Project
11 * by Matthew Dillon <dillon@backplane.com>
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
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
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
38 #include <sys/types.h>
40 #include <vfs/hammer2/hammer2.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>
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);
69 main(int ac, char **av)
72 const char *corefile = NULL;
73 const char *sysfile = NULL;
79 while ((ch = getopt(ac, av, "M:N:")) != -1) {
88 fprintf(stderr, "%s [-M core] [-N system]\n", av[0]);
95 if ((kd = kvm_open(sysfile, corefile, NULL, O_RDONLY, "kvm:")) == NULL) {
100 if (kvm_nlist(kd, Nl) != 0) {
104 kkread(kd, Nl[0].n_value, &nch, sizeof(nch));
105 kkread(kd, Nl[1].n_value, &list, sizeof(list));
108 base = strtoul(av[0], NULL, 0);
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);
114 h2chainscan(kd, 4, cp,
115 base + offsetof(struct hammer2_dev, vchain),
119 cp = (uintptr_t)hmp.fchain.core.rbtree.rbh_root;
120 printf("FCHAIN %08x\n", hmp.fchain.flags);
122 h2chainscan(kd, 4, cp,
123 base + offsetof(struct hammer2_dev, fchain),
131 h2chainscan(kvm_t *kd, int tab, uintptr_t cp, uintptr_t pcp, int pflags)
133 hammer2_chain_t chain;
135 kkread(kd, cp, &chain, sizeof(chain));
136 if (chain.rbnode.rbe_left)
137 h2chainscan(kd, tab, (uintptr_t)chain.rbnode.rbe_left,
140 printf("%*.*s chain %p type %02x lock %p dio %p "
141 "off/pbase=%016jx/%016jx flags %08x ",
143 (void *)cp, chain.bref.type, chain.lock.mtx_owner, chain.dio,
144 chain.bref.data_off & ~(hammer2_off_t)0x0F,
145 chain.bref.data_off & ~(hammer2_off_t)65535,
147 if (chain.flags & HAMMER2_CHAIN_ONFLUSH)
149 if (chain.flags & HAMMER2_CHAIN_MODIFIED)
151 if (chain.flags & (HAMMER2_CHAIN_ONFLUSH|HAMMER2_CHAIN_MODIFIED)) {
152 if ((pflags & HAMMER2_CHAIN_ONFLUSH) == 0)
155 if ((uintptr_t)chain.parent != pcp)
158 if (chain.core.rbtree.rbh_root)
159 h2chainscan(kd, tab + 4,
160 (uintptr_t)chain.core.rbtree.rbh_root,
163 if (chain.rbnode.rbe_right)
164 h2chainscan(kd, tab, (uintptr_t)chain.rbnode.rbe_right,
170 kkread(kvm_t *kd, u_long addr, void *buf, size_t nbytes)
172 if (kvm_read(kd, addr, buf, nbytes) != nbytes) {