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
netstack_walk_init(mdb_walk_state_t * wsp)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
netstack_walk_step(mdb_walk_state_t * wsp)54 netstack_walk_step(mdb_walk_state_t *wsp)
55 {
56 int status;
57 netstack_t nss;
58
59 if (wsp->walk_addr == 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
netstack(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)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
netstackid_lookup_cb(uintptr_t addr,const netstack_t * ns,void * arg)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
netstackid2netstack(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)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 }
150