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/i386/pc_hd_label.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 * Mach Operating System 3 * Copyright (c) 1993,1991,1990,1989 Carnegie Mellon University 4 * All Rights Reserved. 5 * 6 * Permission to use, copy, modify and distribute this software and its 7 * documentation is hereby granted, provided that both the copyright 8 * notice and this permission notice appear in all copies of the 9 * software, derivative works or modified versions, and any portions 10 * thereof, and that both notices appear in supporting documentation. 11 * 12 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 13 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR 14 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 15 * 16 * Carnegie Mellon requests users of this software to return to 17 * 18 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 19 * School of Computer Science 20 * Carnegie Mellon University 21 * Pittsburgh PA 15213-3890 22 * 23 * any improvements or extensions that they make and grant Carnegie Mellon 24 * the rights to redistribute these changes. 25 */ 26 /* 27 * HISTORY 28 * $Log: pc_hd_label.c,v $ 29 * Revision 2.2 93/08/10 15:56:36 mrt 30 * Created by Robert Baron from hc.c 31 * 32 */ 33 34 #include <hd.h> 35 36 #include <sys/types.h> 37 #define PRIBIO 20 38 #include <device/buf.h> 39 #include <device/errno.h> 40 #include <device/device_types.h> 41 #include <device/disk_status.h> 42 #include <sys/ioctl.h> 43 #include <i386/pio.h> 44 #include <i386/ipl.h> 45 #include <i386at/disk.h> 46 #include <chips/busses.h> 47 #include <i386at/hdreg.h> 48 49 /* From sys/systm.h */ 50 struct buf *geteblk(); 51 52 extern int hdgotvtoc[NHD]; 53 extern struct alt_info alt_info[NHD]; 54 extern struct disklabel label[NHD]; 55 extern int labeloffset[NHD]; 56 extern int labelsector[NHD]; 57 58 extern int label_flag; 59 extern int allow_bsd_label; 60 61 #define LABEL_DEBUG(x,y) if (label_flag&x) y 62 unsigned dkcksum(); 63 64 65 hdreadlabel(unit, badblocks) 66 unsigned char unit; 67 { 68 struct disklabel *lp = &label[unit]; 69 struct evtoc *evp; 70 struct buf *bp; 71 struct ipart part[FD_NUMPART]; 72 struct ipart *bpart, 73 *ospart = (struct ipart *)0; 74 u_int i, n; 75 76 if (hdgotvtoc[unit]) { 77 if (hdgotvtoc[unit] == -1) 78 sleep(&hdgotvtoc[unit],PRIBIO); 79 return; 80 } 81 setcontroller(unit); /* start sane */ 82 hdgotvtoc[unit] = -1; 83 bp = geteblk(SECSIZE); /* for evtoc */ 84 /* make partition 0 the whole disk in case of failure then get pdinfo*/ 85 lp->d_partitions[PART_DISK].p_offset = 0; 86 lp->d_partitions[PART_DISK].p_size = lp->d_secperunit; 87 /* get active partition */ 88 bp->b_flags = B_READ | B_MD1; 89 bp->b_blkno = 0; 90 bp->b_dev = WHOLE_DISK(unit); /* C partition */ 91 bp->b_bcount = SECSIZE; 92 hdstrategy(bp); 93 biowait(bp); 94 if (bp->b_flags & B_ERROR) { 95 printf("hd%d: can't read sector 0 boot record\n",unit); 96 goto done; 97 } 98 if (((struct mboot *)bp->b_un.b_addr)->signature != 0xaa55) { 99 printf("hd%d: sector 0 corrupt, can't read boot record\n",unit); 100 goto done; 101 } 102 bcopy(((struct mboot *)bp->b_un.b_addr)->parts, 103 part, FD_NUMPART * sizeof (struct ipart)); 104 /* 105 * In search of the bios partition 106 */ 107 bpart = part; 108 #ifdef old 109 { 110 int nmach = 0; 111 struct ipart *mabr = (struct ipart *) 0, 112 *mbr = (struct ipart *) 0; 113 for (i = 0; i < 4; i++, bpart++) { 114 if (bpart->sys_ind == UNIXOS) { 115 if (!nmach++) 116 mabr = bpart; 117 if (bpart->boot_ind == ACTIVE) 118 mbr = bpart; 119 } 120 } 121 if ((int)mabr) 122 bpart = mabr; 123 else if (nmach == 1) 124 bpart = mbr; 125 else if (!nmach) 126 bpart = &mempty; 127 else { 128 printf("More than one mach partition and none active.\n"); 129 printf("Try to fix this from floppies or DOS.\n"); 130 for (;;); 131 } 132 } 133 #else /* old */ 134 for (i = 0; i < 4; i++, bpart++) { 135 LABEL_DEBUG(1,print_dos_partition(i, bpart)); 136 if (bpart->systid == UNIXOS || bpart->systid == BSDOS) { 137 if ((int)ospart) { 138 if (bpart->bootid == ACTIVE) 139 ospart = bpart; 140 } else 141 ospart = bpart; 142 } 143 144 } 145 if (!ospart) 146 goto done; 147 #endif /* old */ 148 OS = ospart->systid; 149 if (OS == UNIXOS) 150 printf("hd%d: MACH OS ", unit); 151 if (OS == BSDOS) 152 printf("hd%d: XXXBSD OS ", unit); 153 /* set correct partition information */ 154 lp->d_partitions[PART_DISK].p_offset = ospart->relsect; 155 lp->d_partitions[PART_DISK].p_size = ospart->numsect; 156 if (hd_bios_bsd_label(unit, bp, lp, ospart)) 157 goto done; 158 /* get evtoc out of active unix partition */ 159 bp->b_flags = B_READ; 160 bp->b_blkno = PDLOCATION; 161 hdstrategy(bp); 162 biowait(bp); 163 if (bp->b_flags & B_ERROR) { 164 printf("hd%d: can't read evtoc\n", unit); 165 goto done; 166 } 167 if ((evp = (struct evtoc *)bp->b_un.b_addr)->sanity != VTOC_SANE) { 168 printf("hd%d: evtoc corrupt\n",unit); 169 goto done; 170 } 171 printf("LOCAL LABEL\n"); 172 LABEL_DEBUG(0x40,print_local_label(evp, "ev:")); 173 174 /* pd info from disk must be more accurate than that in cmos thus 175 override hdparm and re- setcontroller() */ 176 n = evp->nparts; 177 if (n >= MAXPARTITIONS) 178 n = MAXPARTITIONS; 179 fudge_bsd_label(lp, DTYPE_ESDI, evp->cyls, evp->tracks, evp->sectors, n); 180 setcontroller(unit); 181 182 /* copy info on all valid partition, zero the others */ 183 for (i = 0; i < n; i++) { 184 if (i == PART_DISK) 185 continue; 186 bzero(&(lp->d_partitions[i]), sizeof (struct partition)); 187 lp->d_partitions[i].p_size = evp->part[i].p_size; 188 lp->d_partitions[i].p_offset = evp->part[i].p_start; 189 lp->d_partitions[i].p_fstype = FS_BSDFFS; 190 } 191 for ( ; i < MAXPARTITIONS; i++) { 192 if (i == PART_DISK) 193 continue; 194 bzero(&(lp->d_partitions[i]), sizeof (struct partition)); 195 } 196 if (badblocks) { 197 /* get alternate sectors out of active unix partition */ 198 bp->b_blkno = evp->alt_ptr/SECSIZE; 199 for (i = 0; i < 4; i++) { 200 bp->b_flags = B_READ; 201 hdstrategy(bp); 202 biowait(bp); 203 if (bp->b_flags & B_ERROR) { 204 printf("hd%d: can't read alternate sectors\n", unit); 205 goto done; 206 } 207 bcopy(bp->b_un.b_addr,(char *)&alt_info[unit]+i*SECSIZE, 208 SECSIZE); 209 bp->b_blkno++; 210 } 211 if (alt_info[unit].alt_sanity != ALT_SANITY) 212 printf("hd%d: alternate sectors corrupt\n", unit); 213 } 214 /* 215 * Just in case 216 */ 217 labeloffset[unit] = 0; 218 labelsector[unit] = (ospart->relsect + LBLLOC); 219 lp->d_checksum = dkcksum(lp); 220 LABEL_DEBUG(2,print_bsd_label(lp, " ")); 221 222 done: 223 brelse(bp); 224 hdgotvtoc[unit]=1; 225 wakeup(&hdgotvtoc[unit]); 226 } 227 228 hd_bios_bsd_label(unit, bp, label, ospart) 229 int unit; 230 struct buf *bp; 231 struct disklabel *label; 232 struct ipart *ospart; 233 { 234 struct disklabel *dlp; 235 int i; 236 237 bp->b_flags = B_READ; 238 bp->b_blkno = LBLLOC; 239 hdstrategy(bp); 240 biowait(bp); 241 if (bp->b_flags & B_ERROR) { 242 printf("hd%d: can't read bsd label\n", unit); 243 return FALSE; 244 } 245 dlp = (struct disklabel *) bp->b_un.b_addr; 246 if (dlp->d_magic != DISKMAGIC || dlp->d_magic2 != DISKMAGIC) { 247 if (ospart->systid == BSDOS) { 248 printf("NO BSD LABEL!!\n"); 249 } 250 return FALSE; 251 } 252 printf("BSD LABEL\n"); 253 LABEL_DEBUG(2,print_bsd_label(dlp, "dk:")); 254 if (dlp->d_flags & D_BADSECT) { 255 printf("hd%d: DISK NEEDS BAD144 SUPPORT. WILL TRY FOR LOCAL LABEL.\n", 256 unit); 257 return FALSE; 258 } 259 260 /* 261 * here's were we dump label 262 */ 263 if (allow_bsd_label == 0) 264 return FALSE; 265 266 *label = *dlp; 267 setcontroller(unit); 268 bzero(&alt_info[unit], sizeof (struct alt_info)); 269 270 labeloffset[unit] = 0; 271 labelsector[unit] = (ospart->relsect + LBLLOC); 272 273 LABEL_DEBUG(0x20,print_bsd_label(label, " ")); 274 return TRUE; 275 } 276 277 hdwritelabel(unit) 278 { 279 struct buf *bp; 280 281 if (alt_info[unit].alt_trk.alt_used || alt_info[unit].alt_sec.alt_used) { 282 printf("hd%x: can not write label: alt trk = %d, alt sec = %d\n", 283 unit, alt_info[unit].alt_trk.alt_used, alt_info[unit].alt_sec.alt_used); 284 return (EINVAL); 285 } 286 printf("hd%x: hdwritelabel replacing label at %d\n", unit, labelsector[unit]); 287 288 bp = geteblk(SECSIZE); 289 bp->b_flags = B_READ | B_MD1; /* MD1 is be absolute */ 290 bp->b_blkno = labelsector[unit]; 291 bp->b_dev = WHOLE_DISK(unit); /* C partition */ 292 bp->b_bcount = SECSIZE; 293 hdstrategy(bp); 294 biowait(bp); 295 if (bp->b_flags & B_ERROR) { 296 printf("hd%d hdwritelabel(): read failure\n", unit); 297 brelse(bp); 298 return (ENXIO); 299 } 300 301 *((struct disklabel *) &(((char *)bp->b_un.b_addr)[labeloffset[unit]])) 302 = label[unit]; 303 304 bp->b_flags = B_WRITE | B_MD1; /* MD1 is be absolute */ 305 bp->b_blkno = labelsector[unit]; 306 bp->b_dev = WHOLE_DISK(unit); /* C partition */ 307 bp->b_bcount = SECSIZE; 308 hdstrategy(bp); 309 biowait(bp); 310 if (bp->b_flags & B_ERROR) { 311 printf("hd%d: hdwritelabel() write failure\n", unit); 312 brelse(bp); 313 return ENXIO; 314 } 315 brelse(bp); 316 317 return D_SUCCESS; 318 } 319 320 io_return_t 321 hdsetlabel(dev_t dev, int flavor, int *data, unsigned int count) 322 { 323 io_return_t errcode = D_SUCCESS; 324 int unit = UNIT(dev); 325 struct disklabel*lp = &label[unit]; 326 327 switch (flavor) { 328 /* set */ 329 case DIOCWLABEL: 330 case DIOCWLABEL - (0x10<<16): 331 if (*(int*)data) 332 /* 333 tgt->flags |= TGT_WRITE_LABEL; 334 else 335 tgt->flags &= ~TGT_WRITE_LABEL; 336 */ break; 337 case DIOCSDINFO: 338 case DIOCSDINFO - (0x10<<16): 339 case DIOCWDINFO: 340 case DIOCWDINFO - (0x10<<16): 341 if (count != sizeof(struct disklabel) / sizeof(int)) 342 return D_INVALID_SIZE; 343 /* 344 * setdisklabel is in scsi/rz_disk.c; but is generic 345 */ 346 errcode = setdisklabel(lp, (struct disklabel*) data); 347 if (errcode || (flavor == DIOCSDINFO) || (flavor == DIOCSDINFO - (0x10<<16))) 348 return errcode; 349 errcode = hdwritelabel(unit); 350 break; 351 } 352 return errcode; 353 }
Cache object: 1174f1e3887df9f039b767bae693efc5
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]