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 2008 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #include <sys/types.h> 27 #include <sys/rwlock.h> 28 #include <mdb/mdb_modapi.h> 29 #include <sys/queue.h> 30 #include <inet/ip.h> 31 #include <sys/hook.h> 32 #include <sys/hook_impl.h> 33 34 #define MAX_LENGTH 64 35 36 /* 37 * List pfhooks hook list information. 38 */ 39 /*ARGSUSED*/ 40 int 41 hooklist(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 42 { 43 hook_event_int_t hr; 44 hook_int_t hl, *hlp; 45 char hrstr[MAX_LENGTH]; 46 GElf_Sym sym; 47 char buf[MDB_SYM_NAMLEN + 1]; 48 char *hintname; 49 hook_t *h; 50 51 if (argc) 52 return (DCMD_USAGE); 53 54 if (mdb_vread((void *)&hr, sizeof (hr), (uintptr_t)addr) == -1) { 55 mdb_warn("couldn't read hook register at %p", addr); 56 return (DCMD_ERR); 57 } 58 59 mdb_printf("%<u>%?s %8s %20s %4s %24s %24s%</u>\n", 60 "ADDR", "FLAG", "FUNC", "HINT", "NAME", "HINTVALUE"); 61 h = &hl.hi_hook; 62 hlp = TAILQ_FIRST(&hr.hei_head); 63 while (hlp) { 64 if (mdb_vread((void *)&hl, sizeof (hl), 65 (uintptr_t)hlp) == -1) { 66 mdb_warn("couldn't read hook list at %p", 67 hlp); 68 return (DCMD_ERR); 69 } 70 if (!h->h_name) { 71 mdb_warn("hook list at %p has null role", h); 72 return (DCMD_ERR); 73 } 74 if (mdb_readstr((char *)hrstr, sizeof (hrstr), 75 (uintptr_t)h->h_name) == -1) { 76 mdb_warn("couldn't read list role at %p", h->h_name); 77 return (DCMD_ERR); 78 } 79 switch (h->h_hint) { 80 case HH_BEFORE : 81 case HH_AFTER : 82 hintname = h->h_hintvalue ? 83 (char *)h->h_hintvalue : ""; 84 break; 85 default : 86 hintname = ""; 87 break; 88 } 89 if (mdb_lookup_by_addr((uintptr_t)h->h_func, 90 MDB_SYM_EXACT, buf, sizeof (buf), &sym) == -1) 91 mdb_printf("%0?p %8x %0?p %4d %24s %24s\n", 92 hlp, h->h_flags, h->h_func, 93 h->h_hint, hrstr, hintname); 94 else 95 mdb_printf("%0?p %8x %20s %4d %24s %24s\n", 96 hlp, h->h_flags, buf, 97 h->h_hint, hrstr, hintname); 98 hlp = TAILQ_NEXT(&hl, hi_entry); 99 } 100 return (DCMD_OK); 101 } 102 103 /* 104 * List pfhooks event information. 105 * List the hooks information in verbose mode as well. 106 */ 107 /*ARGSUSED*/ 108 int 109 hookeventlist(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 110 { 111 hook_family_int_t hf; 112 hook_event_int_t hr, *hrp; 113 hook_event_t hp; 114 char hprstr[MAX_LENGTH]; 115 116 if (argc) 117 return (DCMD_USAGE); 118 119 if (mdb_vread((void *)&hf, sizeof (hf), (uintptr_t)addr) == -1) { 120 mdb_warn("couldn't read hook family at %p", addr); 121 return (DCMD_ERR); 122 } 123 124 mdb_printf("%<u>%?s %10s %20s%</u>\n", "ADDR", "FLAG", "NAME"); 125 hrp = SLIST_FIRST(&hf.hfi_head); 126 while (hrp) { 127 if (mdb_vread((void *)&hr, sizeof (hr), (uintptr_t)hrp) == -1) { 128 mdb_warn("couldn't read hook register at %p", hrp); 129 return (DCMD_ERR); 130 } 131 if (!hr.hei_event) { 132 mdb_warn("hook register at %p has no hook provider", 133 hrp); 134 return (DCMD_ERR); 135 } 136 if (mdb_vread((void *)&hp, sizeof (hp), 137 (uintptr_t)hr.hei_event) == -1) { 138 mdb_warn("hook provider at %p has null role", 139 hr.hei_event); 140 return (DCMD_ERR); 141 } 142 if (!hp.he_name) { 143 mdb_warn("hook provider at %p has null role", 144 hr.hei_event); 145 return (DCMD_ERR); 146 } 147 if (mdb_readstr((char *)hprstr, sizeof (hprstr), 148 (uintptr_t)hp.he_name) == -1) { 149 mdb_warn("couldn't read provider role at %p", 150 hp.he_name); 151 return (DCMD_ERR); 152 } 153 mdb_printf("%0?p %10x %20s\n", hrp, hp.he_flags, hprstr); 154 hrp = SLIST_NEXT(&hr, hei_entry); 155 } 156 157 return (DCMD_OK); 158 } 159 160 /* 161 * List pfhooks family information. 162 */ 163 /*ARGSUSED*/ 164 int 165 hookrootlist(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 166 { 167 struct hook_stack *hks; 168 hook_family_int_head_t hfh; 169 hook_family_int_t hf, *hfp; 170 char hrrstr[MAX_LENGTH]; 171 172 if (argc) 173 return (DCMD_USAGE); 174 175 if (mdb_vread((void *)&hks, sizeof (hks), 176 (uintptr_t)(addr + OFFSETOF(netstack_t, netstack_hook))) == -1) { 177 mdb_warn("couldn't read netstack_hook"); 178 return (DCMD_ERR); 179 } 180 181 if (mdb_vread((void *)&hfh, sizeof (hfh), (uintptr_t)((uintptr_t)hks + 182 OFFSETOF(hook_stack_t, hks_familylist))) == -1) { 183 mdb_warn("couldn't read hook family head"); 184 return (DCMD_ERR); 185 } 186 187 mdb_printf("%<u>%?s %10s%</u>\n", "ADDR", "FAMILY"); 188 hfp = SLIST_FIRST(&hfh); 189 while (hfp) { 190 if (mdb_vread((void *)&hf, sizeof (hf), (uintptr_t)hfp) == -1) { 191 mdb_warn("couldn't read hook family at %p", hfp); 192 return (DCMD_ERR); 193 } 194 if (!hf.hfi_family.hf_name) { 195 mdb_warn("hook root at %p has null role", 196 hf.hfi_family); 197 return (DCMD_ERR); 198 } 199 if (mdb_readstr((char *)hrrstr, sizeof (hrrstr), 200 (uintptr_t)hf.hfi_family.hf_name) == -1) { 201 mdb_warn("couldn't read root role at %p", 202 hf.hfi_family.hf_name); 203 return (DCMD_ERR); 204 } 205 mdb_printf("%0?p %10s\n", hfp, hrrstr); 206 hfp = SLIST_NEXT(&hf, hfi_entry); 207 } 208 209 return (DCMD_OK); 210 } 211 212 213 static int 214 hookevent_stack_walk_init(mdb_walk_state_t *wsp) 215 { 216 hook_family_int_t hf; 217 218 if (wsp->walk_addr == 0) { 219 mdb_warn("global walk not supported\n"); 220 return (WALK_ERR); 221 } 222 223 if (mdb_vread((void *)&hf, sizeof (hf), 224 (uintptr_t)wsp->walk_addr) == -1) { 225 mdb_warn("couldn't read hook family at %p", wsp->walk_addr); 226 return (DCMD_ERR); 227 } 228 wsp->walk_addr = (uintptr_t)SLIST_FIRST(&hf.hfi_head); 229 return (wsp->walk_callback(wsp->walk_addr, wsp->walk_data, 230 wsp->walk_cbdata)); 231 } 232 233 static int 234 hookevent_stack_walk_step(mdb_walk_state_t *wsp) 235 { 236 hook_event_int_t hr; 237 238 if (mdb_vread((void *)&hr, sizeof (hr), 239 (uintptr_t)wsp->walk_addr) == -1) { 240 mdb_warn("couldn't read hook event at %p", wsp->walk_addr); 241 return (DCMD_ERR); 242 } 243 wsp->walk_addr = (uintptr_t)SLIST_NEXT(&hr, hei_entry); 244 if (wsp->walk_addr == 0) 245 return (WALK_DONE); 246 return (wsp->walk_callback(wsp->walk_addr, wsp->walk_data, 247 wsp->walk_cbdata)); 248 } 249 250 static const mdb_dcmd_t dcmds[] = { 251 { "hookrootlist", "", "display hook family information", hookrootlist }, 252 { "hookeventlist", "", "display hook event information", 253 hookeventlist, NULL }, 254 { "hooklist", "", "display hooks", hooklist }, 255 { NULL } 256 }; 257 258 static const mdb_walker_t walkers[] = { 259 { "hookevent_stack", "walk list of hooks", 260 hookevent_stack_walk_init, hookevent_stack_walk_step, NULL }, 261 { NULL } 262 }; 263 264 static const mdb_modinfo_t modinfo = { MDB_API_VERSION, dcmds, walkers }; 265 266 const mdb_modinfo_t * 267 _mdb_init(void) 268 { 269 return (&modinfo); 270 } 271