Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]
FreeBSD/Linux Kernel Cross Reference
sys/geom/geom_pc98.c
Version:
- FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10
SearchContext: - none - 3 - 10
1 /*- 2 * Copyright (c) 2002 Poul-Henning Kamp 3 * Copyright (c) 2002 Networks Associates Technology, Inc. 4 * All rights reserved. 5 * 6 * This software was developed for the FreeBSD Project by Poul-Henning Kamp 7 * and NAI Labs, the Security Research Division of Network Associates, Inc. 8 * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the 9 * DARPA CHATS research program. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD: releng/11.2/sys/geom/geom_pc98.c 332640 2018-04-17 02:18:04Z kevans $"); 35 36 #include <sys/param.h> 37 #include <sys/endian.h> 38 #include <sys/systm.h> 39 #include <sys/sysctl.h> 40 #include <sys/kernel.h> 41 #include <sys/fcntl.h> 42 #include <sys/malloc.h> 43 #include <sys/bio.h> 44 #include <sys/lock.h> 45 #include <sys/mutex.h> 46 #include <sys/proc.h> 47 #include <sys/sbuf.h> 48 49 #include <sys/diskpc98.h> 50 #include <geom/geom.h> 51 #include <geom/geom_slice.h> 52 53 FEATURE(geom_pc98, "GEOM NEC PC9800 partitioning support"); 54 55 #define PC98_CLASS_NAME "PC98" 56 57 struct g_pc98_softc { 58 u_int fwsectors, fwheads, sectorsize; 59 int type[PC98_NPARTS]; 60 u_char sec[8192]; 61 }; 62 63 static void 64 g_pc98_print(int i, struct pc98_partition *dp) 65 { 66 char sname[17]; 67 68 strncpy(sname, dp->dp_name, 16); 69 sname[16] = '\0'; 70 71 hexdump(dp, sizeof(dp[0]), NULL, 0); 72 printf("[%d] mid:%d(0x%x) sid:%d(0x%x)", 73 i, dp->dp_mid, dp->dp_mid, dp->dp_sid, dp->dp_sid); 74 printf(" s:%d/%d/%d", dp->dp_scyl, dp->dp_shd, dp->dp_ssect); 75 printf(" e:%d/%d/%d", dp->dp_ecyl, dp->dp_ehd, dp->dp_esect); 76 printf(" sname:%s\n", sname); 77 } 78 79 /* 80 * XXX: Add gctl_req arg and give good error msgs. 81 * XXX: Check that length argument does not bring boot code inside any slice. 82 */ 83 static int 84 g_pc98_modify(struct g_geom *gp, struct g_pc98_softc *ms, u_char *sec, int len __unused) 85 { 86 int i, error; 87 off_t s[PC98_NPARTS], l[PC98_NPARTS]; 88 struct pc98_partition dp[PC98_NPARTS]; 89 90 g_topology_assert(); 91 92 if (sec[0x1fe] != 0x55 || sec[0x1ff] != 0xaa) 93 return (EBUSY); 94 95 #if 0 96 /* 97 * By convetion, it seems that the ipl program has a jump at location 98 * 0 to the real start of the boot loader. By convetion, it appears 99 * that after this jump, there's a string, terminated by at last one, 100 * if not more, zeros, followed by the target of the jump. FreeBSD's 101 * pc98 boot0 uses 'IPL1' followed by 3 zeros here, likely for 102 * compatibility with some older boot loader. Linux98's boot loader 103 * appears to use 'Linux 98' followed by only two. GRUB/98 appears to 104 * use 'GRUB/98 ' followed by none. These last two appear to be 105 * ported from the ia32 versions, but appear to show similar 106 * convention. Grub/98 has an additional NOP after the jmp, which 107 * isn't present in others. 108 * 109 * The following test was inspired by looking only at partitions 110 * with FreeBSD's boot0 (or one that it is compatible with). As 111 * such, if failed when other IPL programs were used. 112 */ 113 if (sec[4] != 'I' || sec[5] != 'P' || sec[6] != 'L' || sec[7] != '1') 114 return (EBUSY); 115 #endif 116 117 for (i = 0; i < PC98_NPARTS; i++) 118 pc98_partition_dec( 119 sec + 512 + i * sizeof(struct pc98_partition), &dp[i]); 120 121 for (i = 0; i < PC98_NPARTS; i++) { 122 /* If start and end are identical it's bogus */ 123 if (dp[i].dp_ssect == dp[i].dp_esect && 124 dp[i].dp_shd == dp[i].dp_ehd && 125 dp[i].dp_scyl == dp[i].dp_ecyl) 126 s[i] = l[i] = 0; 127 else if (dp[i].dp_ecyl == 0) 128 s[i] = l[i] = 0; 129 else { 130 s[i] = (off_t)dp[i].dp_scyl * 131 ms->fwsectors * ms->fwheads * ms->sectorsize; 132 l[i] = (off_t)(dp[i].dp_ecyl - dp[i].dp_scyl + 1) * 133 ms->fwsectors * ms->fwheads * ms->sectorsize; 134 } 135 if (bootverbose) { 136 printf("PC98 Slice %d on %s:\n", i + 1, gp->name); 137 g_pc98_print(i, dp + i); 138 } 139 if (s[i] < 0 || l[i] < 0) 140 error = EBUSY; 141 else 142 error = g_slice_config(gp, i, G_SLICE_CONFIG_CHECK, 143 s[i], l[i], ms->sectorsize, 144 "%ss%d", gp->name, i + 1); 145 if (error) 146 return (error); 147 } 148 149 for (i = 0; i < PC98_NPARTS; i++) { 150 ms->type[i] = (dp[i].dp_sid << 8) | dp[i].dp_mid; 151 g_slice_config(gp, i, G_SLICE_CONFIG_SET, s[i], l[i], 152 ms->sectorsize, "%ss%d", gp->name, i + 1); 153 } 154 155 bcopy(sec, ms->sec, sizeof (ms->sec)); 156 157 return (0); 158 } 159 160 static int 161 g_pc98_ioctl(struct g_provider *pp, u_long cmd, void *data, int fflag, struct thread *td) 162 { 163 struct g_geom *gp; 164 struct g_pc98_softc *ms; 165 struct g_slicer *gsp; 166 struct g_consumer *cp; 167 int error, opened; 168 169 gp = pp->geom; 170 gsp = gp->softc; 171 ms = gsp->softc; 172 173 opened = 0; 174 error = 0; 175 switch(cmd) { 176 case DIOCSPC98: { 177 if (!(fflag & FWRITE)) 178 return (EPERM); 179 g_topology_lock(); 180 cp = LIST_FIRST(&gp->consumer); 181 if (cp->acw == 0) { 182 error = g_access(cp, 0, 1, 0); 183 if (error == 0) 184 opened = 1; 185 } 186 if (!error) 187 error = g_pc98_modify(gp, ms, data, 8192); 188 if (!error) 189 error = g_write_data(cp, 0, data, 8192); 190 if (opened) 191 g_access(cp, 0, -1 , 0); 192 g_topology_unlock(); 193 return(error); 194 } 195 default: 196 return (ENOIOCTL); 197 } 198 } 199 200 static int 201 g_pc98_start(struct bio *bp) 202 { 203 struct g_provider *pp; 204 struct g_geom *gp; 205 struct g_pc98_softc *mp; 206 struct g_slicer *gsp; 207 int idx; 208 209 pp = bp->bio_to; 210 idx = pp->index; 211 gp = pp->geom; 212 gsp = gp->softc; 213 mp = gsp->softc; 214 if (bp->bio_cmd == BIO_GETATTR) { 215 if (g_handleattr_int(bp, "PC98::type", mp->type[idx])) 216 return (1); 217 if (g_handleattr_off_t(bp, "PC98::offset", 218 gsp->slices[idx].offset)) 219 return (1); 220 } 221 222 return (0); 223 } 224 225 static void 226 g_pc98_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, 227 struct g_consumer *cp __unused, struct g_provider *pp) 228 { 229 struct g_pc98_softc *mp; 230 struct g_slicer *gsp; 231 struct pc98_partition dp; 232 char sname[17]; 233 234 gsp = gp->softc; 235 mp = gsp->softc; 236 g_slice_dumpconf(sb, indent, gp, cp, pp); 237 if (pp != NULL) { 238 pc98_partition_dec( 239 mp->sec + 512 + 240 pp->index * sizeof(struct pc98_partition), &dp); 241 strncpy(sname, dp.dp_name, 16); 242 sname[16] = '\0'; 243 if (indent == NULL) { 244 sbuf_printf(sb, " ty %d", mp->type[pp->index]); 245 sbuf_printf(sb, " sn %s", sname); 246 } else { 247 sbuf_printf(sb, "%s<type>%d</type>\n", indent, 248 mp->type[pp->index]); 249 sbuf_printf(sb, "%s<sname>%s</sname>\n", indent, 250 sname); 251 } 252 } 253 } 254 255 static struct g_geom * 256 g_pc98_taste(struct g_class *mp, struct g_provider *pp, int flags) 257 { 258 struct g_geom *gp; 259 struct g_consumer *cp; 260 int error; 261 struct g_pc98_softc *ms; 262 u_int fwsectors, fwheads, sectorsize; 263 u_char *buf; 264 265 g_trace(G_T_TOPOLOGY, "g_pc98_taste(%s,%s)", mp->name, pp->name); 266 g_topology_assert(); 267 if (flags == G_TF_NORMAL && 268 !strcmp(pp->geom->class->name, PC98_CLASS_NAME)) 269 return (NULL); 270 gp = g_slice_new(mp, PC98_NPARTS, pp, &cp, &ms, sizeof *ms, 271 g_pc98_start); 272 if (gp == NULL) 273 return (NULL); 274 g_topology_unlock(); 275 do { 276 if (gp->rank != 2 && flags == G_TF_NORMAL) 277 break; 278 error = g_getattr("GEOM::fwsectors", cp, &fwsectors); 279 if (error || fwsectors == 0) { 280 fwsectors = 17; 281 if (bootverbose) 282 printf("g_pc98_taste: guessing %d sectors\n", 283 fwsectors); 284 } 285 error = g_getattr("GEOM::fwheads", cp, &fwheads); 286 if (error || fwheads == 0) { 287 fwheads = 8; 288 if (bootverbose) 289 printf("g_pc98_taste: guessing %d heads\n", 290 fwheads); 291 } 292 sectorsize = cp->provider->sectorsize; 293 if (sectorsize % 512 != 0) 294 break; 295 buf = g_read_data(cp, 0, 8192, NULL); 296 if (buf == NULL) 297 break; 298 ms->fwsectors = fwsectors; 299 ms->fwheads = fwheads; 300 ms->sectorsize = sectorsize; 301 g_topology_lock(); 302 g_pc98_modify(gp, ms, buf, 8192); 303 g_topology_unlock(); 304 g_free(buf); 305 break; 306 } while (0); 307 g_topology_lock(); 308 g_access(cp, -1, 0, 0); 309 if (LIST_EMPTY(&gp->provider)) { 310 g_slice_spoiled(cp); 311 return (NULL); 312 } 313 return (gp); 314 } 315 316 static void 317 g_pc98_config(struct gctl_req *req, struct g_class *mp, const char *verb) 318 { 319 struct g_geom *gp; 320 struct g_consumer *cp; 321 struct g_pc98_softc *ms; 322 struct g_slicer *gsp; 323 int opened = 0, error = 0; 324 void *data; 325 int len; 326 327 g_topology_assert(); 328 gp = gctl_get_geom(req, mp, "geom"); 329 if (gp == NULL) 330 return; 331 if (strcmp(verb, "write PC98")) { 332 gctl_error(req, "Unknown verb"); 333 return; 334 } 335 gsp = gp->softc; 336 ms = gsp->softc; 337 data = gctl_get_param(req, "data", &len); 338 if (data == NULL) 339 return; 340 if (len < 8192 || (len % 512)) { 341 gctl_error(req, "Wrong request length"); 342 return; 343 } 344 cp = LIST_FIRST(&gp->consumer); 345 if (cp->acw == 0) { 346 error = g_access(cp, 0, 1, 0); 347 if (error == 0) 348 opened = 1; 349 } 350 if (!error) 351 error = g_pc98_modify(gp, ms, data, len); 352 if (error) 353 gctl_error(req, "conflict with open slices"); 354 if (!error) 355 error = g_write_data(cp, 0, data, len); 356 if (error) 357 gctl_error(req, "sector zero write failed"); 358 if (opened) 359 g_access(cp, 0, -1 , 0); 360 return; 361 } 362 363 static struct g_class g_pc98_class = { 364 .name = PC98_CLASS_NAME, 365 .version = G_VERSION, 366 .taste = g_pc98_taste, 367 .dumpconf = g_pc98_dumpconf, 368 .ctlreq = g_pc98_config, 369 .ioctl = g_pc98_ioctl, 370 }; 371 372 DECLARE_GEOM_CLASS(g_pc98_class, g_pc98); 373 MODULE_VERSION(geom_pc98, 0);
Cache object: 4c3c8decf74131764f19b3cd6eaeea64
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]