Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/fs/ufs/super.c
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1 /* 2 * linux/fs/ufs/super.c 3 * 4 * Copyright (C) 1998 5 * Daniel Pirkl <daniel.pirkl@email.cz> 6 * Charles University, Faculty of Mathematics and Physics 7 */ 8 9 /* Derived from 10 * 11 * linux/fs/ext2/super.c 12 * 13 * Copyright (C) 1992, 1993, 1994, 1995 14 * Remy Card (card@masi.ibp.fr) 15 * Laboratoire MASI - Institut Blaise Pascal 16 * Universite Pierre et Marie Curie (Paris VI) 17 * 18 * from 19 * 20 * linux/fs/minix/inode.c 21 * 22 * Copyright (C) 1991, 1992 Linus Torvalds 23 * 24 * Big-endian to little-endian byte-swapping/bitmaps by 25 * David S. Miller (davem@caip.rutgers.edu), 1995 26 */ 27 28 /* 29 * Inspired by 30 * 31 * linux/fs/ufs/super.c 32 * 33 * Copyright (C) 1996 34 * Adrian Rodriguez (adrian@franklins-tower.rutgers.edu) 35 * Laboratory for Computer Science Research Computing Facility 36 * Rutgers, The State University of New Jersey 37 * 38 * Copyright (C) 1996 Eddie C. Dost (ecd@skynet.be) 39 * 40 * Kernel module support added on 96/04/26 by 41 * Stefan Reinauer <stepan@home.culture.mipt.ru> 42 * 43 * Module usage counts added on 96/04/29 by 44 * Gertjan van Wingerde <gertjan@cs.vu.nl> 45 * 46 * Clean swab support on 19970406 by 47 * Francois-Rene Rideau <fare@tunes.org> 48 * 49 * 4.4BSD (FreeBSD) support added on February 1st 1998 by 50 * Niels Kristian Bech Jensen <nkbj@image.dk> partially based 51 * on code by Martin von Loewis <martin@mira.isdn.cs.tu-berlin.de>. 52 * 53 * NeXTstep support added on February 5th 1998 by 54 * Niels Kristian Bech Jensen <nkbj@image.dk>. 55 * 56 * write support Daniel Pirkl <daniel.pirkl@email.cz> 1998 57 * 58 * HP/UX hfs filesystem support added by 59 * Martin K. Petersen <mkp@mkp.net>, August 1999 60 * 61 */ 62 63 64 #include <linux/config.h> 65 #include <linux/module.h> 66 67 #include <stdarg.h> 68 69 #include <asm/bitops.h> 70 #include <asm/uaccess.h> 71 #include <asm/system.h> 72 73 #include <linux/errno.h> 74 #include <linux/fs.h> 75 #include <linux/ufs_fs.h> 76 #include <linux/slab.h> 77 #include <linux/sched.h> 78 #include <linux/stat.h> 79 #include <linux/string.h> 80 #include <linux/locks.h> 81 #include <linux/blkdev.h> 82 #include <linux/init.h> 83 84 #include "swab.h" 85 #include "util.h" 86 87 #undef UFS_SUPER_DEBUG 88 #undef UFS_SUPER_DEBUG_MORE 89 90 #ifdef UFS_SUPER_DEBUG 91 #define UFSD(x) printk("(%s, %d), %s: ", __FILE__, __LINE__, __FUNCTION__); printk x; 92 #else 93 #define UFSD(x) 94 #endif 95 96 #ifdef UFS_SUPER_DEBUG_MORE 97 /* 98 * Print contents of ufs_super_block, useful for debugging 99 */ 100 void ufs_print_super_stuff(struct super_block *sb, 101 struct ufs_super_block_first * usb1, 102 struct ufs_super_block_second * usb2, 103 struct ufs_super_block_third * usb3) 104 { 105 printk("ufs_print_super_stuff\n"); 106 printk("size of usb: %u\n", sizeof(struct ufs_super_block)); 107 printk(" magic: 0x%x\n", fs32_to_cpu(sb, usb3->fs_magic)); 108 printk(" sblkno: %u\n", fs32_to_cpu(sb, usb1->fs_sblkno)); 109 printk(" cblkno: %u\n", fs32_to_cpu(sb, usb1->fs_cblkno)); 110 printk(" iblkno: %u\n", fs32_to_cpu(sb, usb1->fs_iblkno)); 111 printk(" dblkno: %u\n", fs32_to_cpu(sb, usb1->fs_dblkno)); 112 printk(" cgoffset: %u\n", fs32_to_cpu(sb, usb1->fs_cgoffset)); 113 printk(" ~cgmask: 0x%x\n", ~fs32_to_cpu(sb, usb1->fs_cgmask)); 114 printk(" size: %u\n", fs32_to_cpu(sb, usb1->fs_size)); 115 printk(" dsize: %u\n", fs32_to_cpu(sb, usb1->fs_dsize)); 116 printk(" ncg: %u\n", fs32_to_cpu(sb, usb1->fs_ncg)); 117 printk(" bsize: %u\n", fs32_to_cpu(sb, usb1->fs_bsize)); 118 printk(" fsize: %u\n", fs32_to_cpu(sb, usb1->fs_fsize)); 119 printk(" frag: %u\n", fs32_to_cpu(sb, usb1->fs_frag)); 120 printk(" fragshift: %u\n", fs32_to_cpu(sb, usb1->fs_fragshift)); 121 printk(" ~fmask: %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask)); 122 printk(" fshift: %u\n", fs32_to_cpu(sb, usb1->fs_fshift)); 123 printk(" sbsize: %u\n", fs32_to_cpu(sb, usb1->fs_sbsize)); 124 printk(" spc: %u\n", fs32_to_cpu(sb, usb1->fs_spc)); 125 printk(" cpg: %u\n", fs32_to_cpu(sb, usb1->fs_cpg)); 126 printk(" ipg: %u\n", fs32_to_cpu(sb, usb1->fs_ipg)); 127 printk(" fpg: %u\n", fs32_to_cpu(sb, usb1->fs_fpg)); 128 printk(" csaddr: %u\n", fs32_to_cpu(sb, usb1->fs_csaddr)); 129 printk(" cssize: %u\n", fs32_to_cpu(sb, usb1->fs_cssize)); 130 printk(" cgsize: %u\n", fs32_to_cpu(sb, usb1->fs_cgsize)); 131 printk(" fstodb: %u\n", fs32_to_cpu(sb, usb1->fs_fsbtodb)); 132 printk(" contigsumsize: %d\n", fs32_to_cpu(sb, usb3->fs_u2.fs_44.fs_contigsumsize)); 133 printk(" postblformat: %u\n", fs32_to_cpu(sb, usb3->fs_postblformat)); 134 printk(" nrpos: %u\n", fs32_to_cpu(sb, usb3->fs_nrpos)); 135 printk(" ndir %u\n", fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir)); 136 printk(" nifree %u\n", fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree)); 137 printk(" nbfree %u\n", fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree)); 138 printk(" nffree %u\n", fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree)); 139 printk("\n"); 140 } 141 142 143 /* 144 * Print contents of ufs_cylinder_group, useful for debugging 145 */ 146 void ufs_print_cylinder_stuff(struct super_block *sb, struct ufs_cylinder_group *cg) 147 { 148 printk("\nufs_print_cylinder_stuff\n"); 149 printk("size of ucg: %u\n", sizeof(struct ufs_cylinder_group)); 150 printk(" magic: %x\n", fs32_to_cpu(sb, cg->cg_magic)); 151 printk(" time: %u\n", fs32_to_cpu(sb, cg->cg_time)); 152 printk(" cgx: %u\n", fs32_to_cpu(sb, cg->cg_cgx)); 153 printk(" ncyl: %u\n", fs16_to_cpu(sb, cg->cg_ncyl)); 154 printk(" niblk: %u\n", fs16_to_cpu(sb, cg->cg_niblk)); 155 printk(" ndblk: %u\n", fs32_to_cpu(sb, cg->cg_ndblk)); 156 printk(" cs_ndir: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir)); 157 printk(" cs_nbfree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree)); 158 printk(" cs_nifree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree)); 159 printk(" cs_nffree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree)); 160 printk(" rotor: %u\n", fs32_to_cpu(sb, cg->cg_rotor)); 161 printk(" frotor: %u\n", fs32_to_cpu(sb, cg->cg_frotor)); 162 printk(" irotor: %u\n", fs32_to_cpu(sb, cg->cg_irotor)); 163 printk(" frsum: %u, %u, %u, %u, %u, %u, %u, %u\n", 164 fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]), 165 fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]), 166 fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]), 167 fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7])); 168 printk(" btotoff: %u\n", fs32_to_cpu(sb, cg->cg_btotoff)); 169 printk(" boff: %u\n", fs32_to_cpu(sb, cg->cg_boff)); 170 printk(" iuseoff: %u\n", fs32_to_cpu(sb, cg->cg_iusedoff)); 171 printk(" freeoff: %u\n", fs32_to_cpu(sb, cg->cg_freeoff)); 172 printk(" nextfreeoff: %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff)); 173 printk(" clustersumoff %u\n", fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff)); 174 printk(" clusteroff %u\n", fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff)); 175 printk(" nclusterblks %u\n", fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks)); 176 printk("\n"); 177 } 178 #endif /* UFS_SUPER_DEBUG_MORE */ 179 180 static struct super_operations ufs_super_ops; 181 182 static char error_buf[1024]; 183 184 void ufs_error (struct super_block * sb, const char * function, 185 const char * fmt, ...) 186 { 187 struct ufs_sb_private_info * uspi; 188 struct ufs_super_block_first * usb1; 189 va_list args; 190 191 uspi = sb->u.ufs_sb.s_uspi; 192 usb1 = ubh_get_usb_first(USPI_UBH); 193 194 if (!(sb->s_flags & MS_RDONLY)) { 195 usb1->fs_clean = UFS_FSBAD; 196 ubh_mark_buffer_dirty(USPI_UBH); 197 sb->s_dirt = 1; 198 sb->s_flags |= MS_RDONLY; 199 } 200 va_start (args, fmt); 201 vsprintf (error_buf, fmt, args); 202 va_end (args); 203 switch (sb->u.ufs_sb.s_mount_opt & UFS_MOUNT_ONERROR) { 204 case UFS_MOUNT_ONERROR_PANIC: 205 panic ("UFS-fs panic (device %s): %s: %s\n", 206 kdevname(sb->s_dev), function, error_buf); 207 208 case UFS_MOUNT_ONERROR_LOCK: 209 case UFS_MOUNT_ONERROR_UMOUNT: 210 case UFS_MOUNT_ONERROR_REPAIR: 211 printk (KERN_CRIT "UFS-fs error (device %s): %s: %s\n", 212 kdevname(sb->s_dev), function, error_buf); 213 } 214 } 215 216 void ufs_panic (struct super_block * sb, const char * function, 217 const char * fmt, ...) 218 { 219 struct ufs_sb_private_info * uspi; 220 struct ufs_super_block_first * usb1; 221 va_list args; 222 223 uspi = sb->u.ufs_sb.s_uspi; 224 usb1 = ubh_get_usb_first(USPI_UBH); 225 226 if (!(sb->s_flags & MS_RDONLY)) { 227 usb1->fs_clean = UFS_FSBAD; 228 ubh_mark_buffer_dirty(USPI_UBH); 229 sb->s_dirt = 1; 230 } 231 va_start (args, fmt); 232 vsprintf (error_buf, fmt, args); 233 va_end (args); 234 sb->s_flags |= MS_RDONLY; 235 printk (KERN_CRIT "UFS-fs panic (device %s): %s: %s\n", 236 kdevname(sb->s_dev), function, error_buf); 237 } 238 239 void ufs_warning (struct super_block * sb, const char * function, 240 const char * fmt, ...) 241 { 242 va_list args; 243 244 va_start (args, fmt); 245 vsprintf (error_buf, fmt, args); 246 va_end (args); 247 printk (KERN_WARNING "UFS-fs warning (device %s): %s: %s\n", 248 kdevname(sb->s_dev), function, error_buf); 249 } 250 251 static int ufs_parse_options (char * options, unsigned * mount_options) 252 { 253 char * this_char; 254 char * value; 255 256 UFSD(("ENTER\n")) 257 258 if (!options) 259 return 1; 260 261 for (this_char = strtok (options, ","); 262 this_char != NULL; 263 this_char = strtok (NULL, ",")) { 264 265 if ((value = strchr (this_char, '=')) != NULL) 266 *value++ = 0; 267 if (!strcmp (this_char, "ufstype")) { 268 ufs_clear_opt (*mount_options, UFSTYPE); 269 if (!strcmp (value, "old")) 270 ufs_set_opt (*mount_options, UFSTYPE_OLD); 271 else if (!strcmp (value, "sun")) 272 ufs_set_opt (*mount_options, UFSTYPE_SUN); 273 else if (!strcmp (value, "44bsd")) 274 ufs_set_opt (*mount_options, UFSTYPE_44BSD); 275 else if (!strcmp (value, "nextstep")) 276 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP); 277 else if (!strcmp (value, "nextstep-cd")) 278 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD); 279 else if (!strcmp (value, "openstep")) 280 ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP); 281 else if (!strcmp (value, "sunx86")) 282 ufs_set_opt (*mount_options, UFSTYPE_SUNx86); 283 else if (!strcmp (value, "hp")) 284 ufs_set_opt (*mount_options, UFSTYPE_HP); 285 else { 286 printk ("UFS-fs: Invalid type option: %s\n", value); 287 return 0; 288 } 289 } 290 else if (!strcmp (this_char, "onerror")) { 291 ufs_clear_opt (*mount_options, ONERROR); 292 if (!strcmp (value, "panic")) 293 ufs_set_opt (*mount_options, ONERROR_PANIC); 294 else if (!strcmp (value, "lock")) 295 ufs_set_opt (*mount_options, ONERROR_LOCK); 296 else if (!strcmp (value, "umount")) 297 ufs_set_opt (*mount_options, ONERROR_UMOUNT); 298 else if (!strcmp (value, "repair")) { 299 printk("UFS-fs: Unable to do repair on error, " 300 "will lock lock instead \n"); 301 ufs_set_opt (*mount_options, ONERROR_REPAIR); 302 } 303 else { 304 printk ("UFS-fs: Invalid action onerror: %s\n", value); 305 return 0; 306 } 307 } 308 else { 309 printk("UFS-fs: Invalid option: %s\n", this_char); 310 return 0; 311 } 312 } 313 return 1; 314 } 315 316 /* 317 * Read on-disk structures associated with cylinder groups 318 */ 319 int ufs_read_cylinder_structures (struct super_block * sb) { 320 struct ufs_sb_private_info * uspi; 321 struct ufs_buffer_head * ubh; 322 unsigned char * base, * space; 323 unsigned size, blks, i; 324 325 UFSD(("ENTER\n")) 326 327 uspi = sb->u.ufs_sb.s_uspi; 328 329 /* 330 * Read cs structures from (usually) first data block 331 * on the device. 332 */ 333 size = uspi->s_cssize; 334 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift; 335 base = space = kmalloc(size, GFP_KERNEL); 336 if (!base) 337 goto failed; 338 for (i = 0; i < blks; i += uspi->s_fpb) { 339 size = uspi->s_bsize; 340 if (i + uspi->s_fpb > blks) 341 size = (blks - i) * uspi->s_fsize; 342 ubh = ubh_bread(sb, uspi->s_csaddr + i, size); 343 if (!ubh) 344 goto failed; 345 ubh_ubhcpymem (space, ubh, size); 346 sb->u.ufs_sb.s_csp[ufs_fragstoblks(i)] = (struct ufs_csum *)space; 347 space += size; 348 ubh_brelse (ubh); 349 ubh = NULL; 350 } 351 352 /* 353 * Read cylinder group (we read only first fragment from block 354 * at this time) and prepare internal data structures for cg caching. 355 */ 356 if (!(sb->u.ufs_sb.s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_KERNEL))) 357 goto failed; 358 for (i = 0; i < uspi->s_ncg; i++) 359 sb->u.ufs_sb.s_ucg[i] = NULL; 360 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) { 361 sb->u.ufs_sb.s_ucpi[i] = NULL; 362 sb->u.ufs_sb.s_cgno[i] = UFS_CGNO_EMPTY; 363 } 364 for (i = 0; i < uspi->s_ncg; i++) { 365 UFSD(("read cg %u\n", i)) 366 if (!(sb->u.ufs_sb.s_ucg[i] = sb_bread(sb, ufs_cgcmin(i)))) 367 goto failed; 368 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sb->u.ufs_sb.s_ucg[i]->b_data)) 369 goto failed; 370 #ifdef UFS_SUPER_DEBUG_MORE 371 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sb->u.ufs_sb.s_ucg[i]->b_data); 372 #endif 373 } 374 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) { 375 if (!(sb->u.ufs_sb.s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_KERNEL))) 376 goto failed; 377 sb->u.ufs_sb.s_cgno[i] = UFS_CGNO_EMPTY; 378 } 379 sb->u.ufs_sb.s_cg_loaded = 0; 380 UFSD(("EXIT\n")) 381 return 1; 382 383 failed: 384 if (base) kfree (base); 385 if (sb->u.ufs_sb.s_ucg) { 386 for (i = 0; i < uspi->s_ncg; i++) 387 if (sb->u.ufs_sb.s_ucg[i]) brelse (sb->u.ufs_sb.s_ucg[i]); 388 kfree (sb->u.ufs_sb.s_ucg); 389 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) 390 if (sb->u.ufs_sb.s_ucpi[i]) kfree (sb->u.ufs_sb.s_ucpi[i]); 391 } 392 UFSD(("EXIT (FAILED)\n")) 393 return 0; 394 } 395 396 /* 397 * Put on-disk structures associated with cylinder groups and 398 * write them back to disk 399 */ 400 void ufs_put_cylinder_structures (struct super_block * sb) { 401 struct ufs_sb_private_info * uspi; 402 struct ufs_buffer_head * ubh; 403 unsigned char * base, * space; 404 unsigned blks, size, i; 405 406 UFSD(("ENTER\n")) 407 408 uspi = sb->u.ufs_sb.s_uspi; 409 410 size = uspi->s_cssize; 411 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift; 412 base = space = (char*) sb->u.ufs_sb.s_csp[0]; 413 for (i = 0; i < blks; i += uspi->s_fpb) { 414 size = uspi->s_bsize; 415 if (i + uspi->s_fpb > blks) 416 size = (blks - i) * uspi->s_fsize; 417 ubh = ubh_bread(sb, uspi->s_csaddr + i, size); 418 ubh_memcpyubh (ubh, space, size); 419 space += size; 420 ubh_mark_buffer_uptodate (ubh, 1); 421 ubh_mark_buffer_dirty (ubh); 422 ubh_brelse (ubh); 423 } 424 for (i = 0; i < sb->u.ufs_sb.s_cg_loaded; i++) { 425 ufs_put_cylinder (sb, i); 426 kfree (sb->u.ufs_sb.s_ucpi[i]); 427 } 428 for (; i < UFS_MAX_GROUP_LOADED; i++) 429 kfree (sb->u.ufs_sb.s_ucpi[i]); 430 for (i = 0; i < uspi->s_ncg; i++) 431 brelse (sb->u.ufs_sb.s_ucg[i]); 432 kfree (sb->u.ufs_sb.s_ucg); 433 kfree (base); 434 UFSD(("EXIT\n")) 435 } 436 437 struct super_block * ufs_read_super (struct super_block * sb, void * data, 438 int silent) 439 { 440 struct ufs_sb_private_info * uspi; 441 struct ufs_super_block_first * usb1; 442 struct ufs_super_block_second * usb2; 443 struct ufs_super_block_third * usb3; 444 struct ufs_buffer_head * ubh; 445 struct inode *inode; 446 unsigned block_size, super_block_size; 447 unsigned flags; 448 449 uspi = NULL; 450 ubh = NULL; 451 flags = 0; 452 453 UFSD(("ENTER\n")) 454 455 UFSD(("flag %u\n", (int)(sb->s_flags & MS_RDONLY))) 456 457 #ifndef CONFIG_UFS_FS_WRITE 458 if (!(sb->s_flags & MS_RDONLY)) { 459 printk("ufs was compiled with read-only support, " 460 "can't be mounted as read-write\n"); 461 goto failed; 462 } 463 #endif 464 /* 465 * Set default mount options 466 * Parse mount options 467 */ 468 sb->u.ufs_sb.s_mount_opt = 0; 469 ufs_set_opt (sb->u.ufs_sb.s_mount_opt, ONERROR_LOCK); 470 if (!ufs_parse_options ((char *) data, &sb->u.ufs_sb.s_mount_opt)) { 471 printk("wrong mount options\n"); 472 goto failed; 473 } 474 if (!(sb->u.ufs_sb.s_mount_opt & UFS_MOUNT_UFSTYPE)) { 475 printk("You didn't specify the type of your ufs filesystem\n\n" 476 "mount -t ufs -o ufstype=" 477 "sun|sunx86|44bsd|old|hp|nextstep|netxstep-cd|openstep ...\n\n" 478 ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, " 479 "default is ufstype=old\n"); 480 ufs_set_opt (sb->u.ufs_sb.s_mount_opt, UFSTYPE_OLD); 481 } 482 483 sb->u.ufs_sb.s_uspi = uspi = 484 kmalloc (sizeof(struct ufs_sb_private_info), GFP_KERNEL); 485 if (!uspi) 486 goto failed; 487 488 /* Keep 2Gig file limit. Some UFS variants need to override 489 this but as I don't know which I'll let those in the know loosen 490 the rules */ 491 492 switch (sb->u.ufs_sb.s_mount_opt & UFS_MOUNT_UFSTYPE) { 493 case UFS_MOUNT_UFSTYPE_44BSD: 494 UFSD(("ufstype=44bsd\n")) 495 uspi->s_fsize = block_size = 512; 496 uspi->s_fmask = ~(512 - 1); 497 uspi->s_fshift = 9; 498 uspi->s_sbsize = super_block_size = 1536; 499 uspi->s_sbbase = 0; 500 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; 501 break; 502 503 case UFS_MOUNT_UFSTYPE_SUN: 504 UFSD(("ufstype=sun\n")) 505 uspi->s_fsize = block_size = 1024; 506 uspi->s_fmask = ~(1024 - 1); 507 uspi->s_fshift = 10; 508 uspi->s_sbsize = super_block_size = 2048; 509 uspi->s_sbbase = 0; 510 uspi->s_maxsymlinklen = 56; 511 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN; 512 break; 513 514 case UFS_MOUNT_UFSTYPE_SUNx86: 515 UFSD(("ufstype=sunx86\n")) 516 uspi->s_fsize = block_size = 1024; 517 uspi->s_fmask = ~(1024 - 1); 518 uspi->s_fshift = 10; 519 uspi->s_sbsize = super_block_size = 2048; 520 uspi->s_sbbase = 0; 521 uspi->s_maxsymlinklen = 56; 522 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN; 523 break; 524 525 case UFS_MOUNT_UFSTYPE_OLD: 526 UFSD(("ufstype=old\n")) 527 uspi->s_fsize = block_size = 1024; 528 uspi->s_fmask = ~(1024 - 1); 529 uspi->s_fshift = 10; 530 uspi->s_sbsize = super_block_size = 2048; 531 uspi->s_sbbase = 0; 532 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 533 if (!(sb->s_flags & MS_RDONLY)) { 534 printk(KERN_INFO "ufstype=old is supported read-only\n"); 535 sb->s_flags |= MS_RDONLY; 536 } 537 break; 538 539 case UFS_MOUNT_UFSTYPE_NEXTSTEP: 540 UFSD(("ufstype=nextstep\n")) 541 uspi->s_fsize = block_size = 1024; 542 uspi->s_fmask = ~(1024 - 1); 543 uspi->s_fshift = 10; 544 uspi->s_sbsize = super_block_size = 2048; 545 uspi->s_sbbase = 0; 546 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 547 if (!(sb->s_flags & MS_RDONLY)) { 548 printk(KERN_INFO "ufstype=nextstep is supported read-only\n"); 549 sb->s_flags |= MS_RDONLY; 550 } 551 break; 552 553 case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD: 554 UFSD(("ufstype=nextstep-cd\n")) 555 uspi->s_fsize = block_size = 2048; 556 uspi->s_fmask = ~(2048 - 1); 557 uspi->s_fshift = 11; 558 uspi->s_sbsize = super_block_size = 2048; 559 uspi->s_sbbase = 0; 560 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 561 if (!(sb->s_flags & MS_RDONLY)) { 562 printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n"); 563 sb->s_flags |= MS_RDONLY; 564 } 565 break; 566 567 case UFS_MOUNT_UFSTYPE_OPENSTEP: 568 UFSD(("ufstype=openstep\n")) 569 uspi->s_fsize = block_size = 1024; 570 uspi->s_fmask = ~(1024 - 1); 571 uspi->s_fshift = 10; 572 uspi->s_sbsize = super_block_size = 2048; 573 uspi->s_sbbase = 0; 574 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; 575 if (!(sb->s_flags & MS_RDONLY)) { 576 printk(KERN_INFO "ufstype=openstep is supported read-only\n"); 577 sb->s_flags |= MS_RDONLY; 578 } 579 break; 580 581 case UFS_MOUNT_UFSTYPE_HP: 582 UFSD(("ufstype=hp\n")) 583 uspi->s_fsize = block_size = 1024; 584 uspi->s_fmask = ~(1024 - 1); 585 uspi->s_fshift = 10; 586 uspi->s_sbsize = super_block_size = 2048; 587 uspi->s_sbbase = 0; 588 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 589 if (!(sb->s_flags & MS_RDONLY)) { 590 printk(KERN_INFO "ufstype=hp is supported read-only\n"); 591 sb->s_flags |= MS_RDONLY; 592 } 593 break; 594 default: 595 printk("unknown ufstype\n"); 596 goto failed; 597 } 598 599 again: 600 if (set_blocksize (sb->s_dev, block_size)) { 601 printk(KERN_ERR "UFS: failed to set blocksize\n"); 602 goto failed; 603 } 604 605 sb->s_blocksize = block_size; 606 607 /* 608 * read ufs super block from device 609 */ 610 ubh = ubh_bread_uspi (uspi, sb, uspi->s_sbbase + UFS_SBLOCK/block_size, super_block_size); 611 if (!ubh) 612 goto failed; 613 614 usb1 = ubh_get_usb_first(USPI_UBH); 615 usb2 = ubh_get_usb_second(USPI_UBH); 616 usb3 = ubh_get_usb_third(USPI_UBH); 617 618 /* 619 * Check ufs magic number 620 */ 621 switch (__constant_le32_to_cpu(usb3->fs_magic)) { 622 case UFS_MAGIC: 623 case UFS_MAGIC_LFN: 624 case UFS_MAGIC_FEA: 625 case UFS_MAGIC_4GB: 626 sb->u.ufs_sb.s_bytesex = BYTESEX_LE; 627 goto magic_found; 628 } 629 switch (__constant_be32_to_cpu(usb3->fs_magic)) { 630 case UFS_MAGIC: 631 case UFS_MAGIC_LFN: 632 case UFS_MAGIC_FEA: 633 case UFS_MAGIC_4GB: 634 sb->u.ufs_sb.s_bytesex = BYTESEX_BE; 635 goto magic_found; 636 } 637 638 if ((((sb->u.ufs_sb.s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP) 639 || ((sb->u.ufs_sb.s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD) 640 || ((sb->u.ufs_sb.s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP)) 641 && uspi->s_sbbase < 256) { 642 ubh_brelse_uspi(uspi); 643 ubh = NULL; 644 uspi->s_sbbase += 8; 645 goto again; 646 } 647 printk("ufs_read_super: bad magic number\n"); 648 goto failed; 649 650 magic_found: 651 /* 652 * Check block and fragment sizes 653 */ 654 uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize); 655 uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize); 656 uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize); 657 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask); 658 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift); 659 660 if (uspi->s_fsize & (uspi->s_fsize - 1)) { 661 printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n", 662 uspi->s_fsize); 663 goto failed; 664 } 665 if (uspi->s_fsize < 512) { 666 printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n", 667 uspi->s_fsize); 668 goto failed; 669 } 670 if (uspi->s_fsize > 4096) { 671 printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n", 672 uspi->s_fsize); 673 goto failed; 674 } 675 if (uspi->s_bsize & (uspi->s_bsize - 1)) { 676 printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n", 677 uspi->s_bsize); 678 goto failed; 679 } 680 if (uspi->s_bsize < 4096) { 681 printk(KERN_ERR "ufs_read_super: block size %u is too small\n", 682 uspi->s_bsize); 683 goto failed; 684 } 685 if (uspi->s_bsize / uspi->s_fsize > 8) { 686 printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n", 687 uspi->s_bsize / uspi->s_fsize); 688 goto failed; 689 } 690 if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) { 691 ubh_brelse_uspi(uspi); 692 ubh = NULL; 693 block_size = uspi->s_fsize; 694 super_block_size = uspi->s_sbsize; 695 UFSD(("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size)) 696 goto again; 697 } 698 699 #ifdef UFS_SUPER_DEBUG_MORE 700 ufs_print_super_stuff(sb, usb1, usb2, usb3); 701 #endif 702 703 /* 704 * Check, if file system was correctly unmounted. 705 * If not, make it read only. 706 */ 707 if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) || 708 ((flags & UFS_ST_MASK) == UFS_ST_OLD) || 709 (((flags & UFS_ST_MASK) == UFS_ST_SUN || 710 (flags & UFS_ST_MASK) == UFS_ST_SUNx86) && 711 (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) { 712 switch(usb1->fs_clean) { 713 case UFS_FSCLEAN: 714 UFSD(("fs is clean\n")) 715 break; 716 case UFS_FSSTABLE: 717 UFSD(("fs is stable\n")) 718 break; 719 case UFS_FSOSF1: 720 UFSD(("fs is DEC OSF/1\n")) 721 break; 722 case UFS_FSACTIVE: 723 printk("ufs_read_super: fs is active\n"); 724 sb->s_flags |= MS_RDONLY; 725 break; 726 case UFS_FSBAD: 727 printk("ufs_read_super: fs is bad\n"); 728 sb->s_flags |= MS_RDONLY; 729 break; 730 default: 731 printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean); 732 sb->s_flags |= MS_RDONLY; 733 break; 734 } 735 } 736 else { 737 printk("ufs_read_super: fs needs fsck\n"); 738 sb->s_flags |= MS_RDONLY; 739 } 740 741 /* 742 * Read ufs_super_block into internal data structures 743 */ 744 sb->s_blocksize = fs32_to_cpu(sb, usb1->fs_fsize); 745 sb->s_blocksize_bits = fs32_to_cpu(sb, usb1->fs_fshift); 746 sb->s_op = &ufs_super_ops; 747 sb->dq_op = NULL; /***/ 748 sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic); 749 750 uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno); 751 uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno); 752 uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno); 753 uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno); 754 uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset); 755 uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask); 756 uspi->s_size = fs32_to_cpu(sb, usb1->fs_size); 757 uspi->s_dsize = fs32_to_cpu(sb, usb1->fs_dsize); 758 uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg); 759 /* s_bsize already set */ 760 /* s_fsize already set */ 761 uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag); 762 uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree); 763 uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask); 764 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask); 765 uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift); 766 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift); 767 uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift); 768 uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb); 769 /* s_sbsize already set */ 770 uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask); 771 uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift); 772 uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir); 773 uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb); 774 uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf); 775 uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3); 776 uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave); 777 uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew); 778 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr); 779 uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize); 780 uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize); 781 uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak); 782 uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect); 783 uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc); 784 uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg); 785 uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg); 786 uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_cpc); 787 uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_u2.fs_44.fs_contigsumsize); 788 uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3); 789 uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3); 790 uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat); 791 uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos); 792 uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff); 793 uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff); 794 795 /* 796 * Compute another frequently used values 797 */ 798 uspi->s_fpbmask = uspi->s_fpb - 1; 799 uspi->s_apbshift = uspi->s_bshift - 2; 800 uspi->s_2apbshift = uspi->s_apbshift * 2; 801 uspi->s_3apbshift = uspi->s_apbshift * 3; 802 uspi->s_apb = 1 << uspi->s_apbshift; 803 uspi->s_2apb = 1 << uspi->s_2apbshift; 804 uspi->s_3apb = 1 << uspi->s_3apbshift; 805 uspi->s_apbmask = uspi->s_apb - 1; 806 uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS; 807 uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift; 808 uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift; 809 uspi->s_bpf = uspi->s_fsize << 3; 810 uspi->s_bpfshift = uspi->s_fshift + 3; 811 uspi->s_bpfmask = uspi->s_bpf - 1; 812 if ((sb->u.ufs_sb.s_mount_opt & UFS_MOUNT_UFSTYPE) == 813 UFS_MOUNT_UFSTYPE_44BSD) 814 uspi->s_maxsymlinklen = 815 fs32_to_cpu(sb, usb3->fs_u2.fs_44.fs_maxsymlinklen); 816 817 sb->u.ufs_sb.s_flags = flags; 818 819 inode = iget(sb, UFS_ROOTINO); 820 if (!inode || is_bad_inode(inode)) 821 goto failed; 822 sb->s_root = d_alloc_root(inode); 823 if (!sb->s_root) 824 goto dalloc_failed; 825 826 827 /* 828 * Read cylinder group structures 829 */ 830 if (!(sb->s_flags & MS_RDONLY)) 831 if (!ufs_read_cylinder_structures(sb)) 832 goto failed; 833 834 UFSD(("EXIT\n")) 835 return(sb); 836 837 dalloc_failed: 838 iput(inode); 839 failed: 840 if (ubh) ubh_brelse_uspi (uspi); 841 if (uspi) kfree (uspi); 842 UFSD(("EXIT (FAILED)\n")) 843 return(NULL); 844 } 845 846 void ufs_write_super (struct super_block * sb) { 847 struct ufs_sb_private_info * uspi; 848 struct ufs_super_block_first * usb1; 849 struct ufs_super_block_third * usb3; 850 unsigned flags; 851 852 UFSD(("ENTER\n")) 853 flags = sb->u.ufs_sb.s_flags; 854 uspi = sb->u.ufs_sb.s_uspi; 855 usb1 = ubh_get_usb_first(USPI_UBH); 856 usb3 = ubh_get_usb_third(USPI_UBH); 857 858 if (!(sb->s_flags & MS_RDONLY)) { 859 usb1->fs_time = cpu_to_fs32(sb, CURRENT_TIME); 860 if ((flags & UFS_ST_MASK) == UFS_ST_SUN 861 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86) 862 ufs_set_fs_state(sb, usb1, usb3, 863 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time)); 864 ubh_mark_buffer_dirty (USPI_UBH); 865 } 866 sb->s_dirt = 0; 867 UFSD(("EXIT\n")) 868 } 869 870 void ufs_put_super (struct super_block * sb) 871 { 872 struct ufs_sb_private_info * uspi; 873 874 UFSD(("ENTER\n")) 875 876 uspi = sb->u.ufs_sb.s_uspi; 877 878 if (!(sb->s_flags & MS_RDONLY)) 879 ufs_put_cylinder_structures (sb); 880 881 ubh_brelse_uspi (uspi); 882 kfree (sb->u.ufs_sb.s_uspi); 883 return; 884 } 885 886 887 int ufs_remount (struct super_block * sb, int * mount_flags, char * data) 888 { 889 struct ufs_sb_private_info * uspi; 890 struct ufs_super_block_first * usb1; 891 struct ufs_super_block_third * usb3; 892 unsigned new_mount_opt, ufstype; 893 unsigned flags; 894 895 uspi = sb->u.ufs_sb.s_uspi; 896 flags = sb->u.ufs_sb.s_flags; 897 usb1 = ubh_get_usb_first(USPI_UBH); 898 usb3 = ubh_get_usb_third(USPI_UBH); 899 900 /* 901 * Allow the "check" option to be passed as a remount option. 902 * It is not possible to change ufstype option during remount 903 */ 904 ufstype = sb->u.ufs_sb.s_mount_opt & UFS_MOUNT_UFSTYPE; 905 new_mount_opt = 0; 906 ufs_set_opt (new_mount_opt, ONERROR_LOCK); 907 if (!ufs_parse_options (data, &new_mount_opt)) 908 return -EINVAL; 909 if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) { 910 new_mount_opt |= ufstype; 911 } 912 else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) { 913 printk("ufstype can't be changed during remount\n"); 914 return -EINVAL; 915 } 916 917 if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) { 918 sb->u.ufs_sb.s_mount_opt = new_mount_opt; 919 return 0; 920 } 921 922 /* 923 * fs was mouted as rw, remounting ro 924 */ 925 if (*mount_flags & MS_RDONLY) { 926 ufs_put_cylinder_structures(sb); 927 usb1->fs_time = cpu_to_fs32(sb, CURRENT_TIME); 928 if ((flags & UFS_ST_MASK) == UFS_ST_SUN 929 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86) 930 ufs_set_fs_state(sb, usb1, usb3, 931 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time)); 932 ubh_mark_buffer_dirty (USPI_UBH); 933 sb->s_dirt = 0; 934 sb->s_flags |= MS_RDONLY; 935 } 936 /* 937 * fs was mounted as ro, remounting rw 938 */ 939 else { 940 #ifndef CONFIG_UFS_FS_WRITE 941 printk("ufs was compiled with read-only support, " 942 "can't be mounted as read-write\n"); 943 return -EINVAL; 944 #else 945 if (ufstype != UFS_MOUNT_UFSTYPE_SUN && 946 ufstype != UFS_MOUNT_UFSTYPE_44BSD && 947 ufstype != UFS_MOUNT_UFSTYPE_SUNx86) { 948 printk("this ufstype is read-only supported\n"); 949 return -EINVAL; 950 } 951 if (!ufs_read_cylinder_structures (sb)) { 952 printk("failed during remounting\n"); 953 return -EPERM; 954 } 955 sb->s_flags &= ~MS_RDONLY; 956 #endif 957 } 958 sb->u.ufs_sb.s_mount_opt = new_mount_opt; 959 return 0; 960 } 961 962 int ufs_statfs (struct super_block * sb, struct statfs * buf) 963 { 964 struct ufs_sb_private_info * uspi; 965 struct ufs_super_block_first * usb1; 966 967 uspi = sb->u.ufs_sb.s_uspi; 968 usb1 = ubh_get_usb_first (USPI_UBH); 969 970 buf->f_type = UFS_MAGIC; 971 buf->f_bsize = sb->s_blocksize; 972 buf->f_blocks = uspi->s_dsize; 973 buf->f_bfree = ufs_blkstofrags(fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree)) + 974 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree); 975 buf->f_bavail = (buf->f_bfree > ((buf->f_blocks / 100) * uspi->s_minfree)) 976 ? (buf->f_bfree - ((buf->f_blocks / 100) * uspi->s_minfree)) : 0; 977 buf->f_files = uspi->s_ncg * uspi->s_ipg; 978 buf->f_ffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree); 979 buf->f_namelen = UFS_MAXNAMLEN; 980 return 0; 981 } 982 983 static struct super_operations ufs_super_ops = { 984 read_inode: ufs_read_inode, 985 write_inode: ufs_write_inode, 986 delete_inode: ufs_delete_inode, 987 put_super: ufs_put_super, 988 write_super: ufs_write_super, 989 statfs: ufs_statfs, 990 remount_fs: ufs_remount, 991 }; 992 993 static DECLARE_FSTYPE_DEV(ufs_fs_type, "ufs", ufs_read_super); 994 995 static int __init init_ufs_fs(void) 996 { 997 return register_filesystem(&ufs_fs_type); 998 } 999 1000 static void __exit exit_ufs_fs(void) 1001 { 1002 unregister_filesystem(&ufs_fs_type); 1003 } 1004 1005 EXPORT_NO_SYMBOLS; 1006 1007 module_init(init_ufs_fs) 1008 module_exit(exit_ufs_fs) 1009 MODULE_LICENSE("GPL");
Cache object: a9be1bf77c5ccc605db72c867ef70484
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