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 * UFS2 (of FreeBSD 5.x) support added by 62 * Niraj Kumar <niraj17@iitbombay.org>, Jan 2004 63 * 64 * UFS2 write support added by 65 * Evgeniy Dushistov <dushistov@mail.ru>, 2007 66 */ 67 68 69 #include <linux/module.h> 70 #include <linux/bitops.h> 71 72 #include <stdarg.h> 73 74 #include <asm/uaccess.h> 75 #include <asm/system.h> 76 77 #include <linux/errno.h> 78 #include <linux/fs.h> 79 #include <linux/quotaops.h> 80 #include <linux/slab.h> 81 #include <linux/time.h> 82 #include <linux/stat.h> 83 #include <linux/string.h> 84 #include <linux/blkdev.h> 85 #include <linux/init.h> 86 #include <linux/parser.h> 87 #include <linux/smp_lock.h> 88 #include <linux/buffer_head.h> 89 #include <linux/vfs.h> 90 #include <linux/log2.h> 91 #include <linux/mount.h> 92 #include <linux/seq_file.h> 93 94 #include "ufs_fs.h" 95 #include "ufs.h" 96 #include "swab.h" 97 #include "util.h" 98 99 #ifdef CONFIG_UFS_DEBUG 100 /* 101 * Print contents of ufs_super_block, useful for debugging 102 */ 103 static void ufs_print_super_stuff(struct super_block *sb, 104 struct ufs_super_block_first *usb1, 105 struct ufs_super_block_second *usb2, 106 struct ufs_super_block_third *usb3) 107 { 108 u32 magic = fs32_to_cpu(sb, usb3->fs_magic); 109 110 printk("ufs_print_super_stuff\n"); 111 printk(" magic: 0x%x\n", magic); 112 if (fs32_to_cpu(sb, usb3->fs_magic) == UFS2_MAGIC) { 113 printk(" fs_size: %llu\n", (unsigned long long) 114 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size)); 115 printk(" fs_dsize: %llu\n", (unsigned long long) 116 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize)); 117 printk(" bsize: %u\n", 118 fs32_to_cpu(sb, usb1->fs_bsize)); 119 printk(" fsize: %u\n", 120 fs32_to_cpu(sb, usb1->fs_fsize)); 121 printk(" fs_volname: %s\n", usb2->fs_un.fs_u2.fs_volname); 122 printk(" fs_sblockloc: %llu\n", (unsigned long long) 123 fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc)); 124 printk(" cs_ndir(No of dirs): %llu\n", (unsigned long long) 125 fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir)); 126 printk(" cs_nbfree(No of free blocks): %llu\n", 127 (unsigned long long) 128 fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree)); 129 printk(KERN_INFO" cs_nifree(Num of free inodes): %llu\n", 130 (unsigned long long) 131 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree)); 132 printk(KERN_INFO" cs_nffree(Num of free frags): %llu\n", 133 (unsigned long long) 134 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree)); 135 printk(KERN_INFO" fs_maxsymlinklen: %u\n", 136 fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen)); 137 } else { 138 printk(" sblkno: %u\n", fs32_to_cpu(sb, usb1->fs_sblkno)); 139 printk(" cblkno: %u\n", fs32_to_cpu(sb, usb1->fs_cblkno)); 140 printk(" iblkno: %u\n", fs32_to_cpu(sb, usb1->fs_iblkno)); 141 printk(" dblkno: %u\n", fs32_to_cpu(sb, usb1->fs_dblkno)); 142 printk(" cgoffset: %u\n", 143 fs32_to_cpu(sb, usb1->fs_cgoffset)); 144 printk(" ~cgmask: 0x%x\n", 145 ~fs32_to_cpu(sb, usb1->fs_cgmask)); 146 printk(" size: %u\n", fs32_to_cpu(sb, usb1->fs_size)); 147 printk(" dsize: %u\n", fs32_to_cpu(sb, usb1->fs_dsize)); 148 printk(" ncg: %u\n", fs32_to_cpu(sb, usb1->fs_ncg)); 149 printk(" bsize: %u\n", fs32_to_cpu(sb, usb1->fs_bsize)); 150 printk(" fsize: %u\n", fs32_to_cpu(sb, usb1->fs_fsize)); 151 printk(" frag: %u\n", fs32_to_cpu(sb, usb1->fs_frag)); 152 printk(" fragshift: %u\n", 153 fs32_to_cpu(sb, usb1->fs_fragshift)); 154 printk(" ~fmask: %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask)); 155 printk(" fshift: %u\n", fs32_to_cpu(sb, usb1->fs_fshift)); 156 printk(" sbsize: %u\n", fs32_to_cpu(sb, usb1->fs_sbsize)); 157 printk(" spc: %u\n", fs32_to_cpu(sb, usb1->fs_spc)); 158 printk(" cpg: %u\n", fs32_to_cpu(sb, usb1->fs_cpg)); 159 printk(" ipg: %u\n", fs32_to_cpu(sb, usb1->fs_ipg)); 160 printk(" fpg: %u\n", fs32_to_cpu(sb, usb1->fs_fpg)); 161 printk(" csaddr: %u\n", fs32_to_cpu(sb, usb1->fs_csaddr)); 162 printk(" cssize: %u\n", fs32_to_cpu(sb, usb1->fs_cssize)); 163 printk(" cgsize: %u\n", fs32_to_cpu(sb, usb1->fs_cgsize)); 164 printk(" fstodb: %u\n", 165 fs32_to_cpu(sb, usb1->fs_fsbtodb)); 166 printk(" nrpos: %u\n", fs32_to_cpu(sb, usb3->fs_nrpos)); 167 printk(" ndir %u\n", 168 fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir)); 169 printk(" nifree %u\n", 170 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree)); 171 printk(" nbfree %u\n", 172 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree)); 173 printk(" nffree %u\n", 174 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree)); 175 } 176 printk("\n"); 177 } 178 179 /* 180 * Print contents of ufs_cylinder_group, useful for debugging 181 */ 182 static void ufs_print_cylinder_stuff(struct super_block *sb, 183 struct ufs_cylinder_group *cg) 184 { 185 printk("\nufs_print_cylinder_stuff\n"); 186 printk("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group)); 187 printk(" magic: %x\n", fs32_to_cpu(sb, cg->cg_magic)); 188 printk(" time: %u\n", fs32_to_cpu(sb, cg->cg_time)); 189 printk(" cgx: %u\n", fs32_to_cpu(sb, cg->cg_cgx)); 190 printk(" ncyl: %u\n", fs16_to_cpu(sb, cg->cg_ncyl)); 191 printk(" niblk: %u\n", fs16_to_cpu(sb, cg->cg_niblk)); 192 printk(" ndblk: %u\n", fs32_to_cpu(sb, cg->cg_ndblk)); 193 printk(" cs_ndir: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir)); 194 printk(" cs_nbfree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree)); 195 printk(" cs_nifree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree)); 196 printk(" cs_nffree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree)); 197 printk(" rotor: %u\n", fs32_to_cpu(sb, cg->cg_rotor)); 198 printk(" frotor: %u\n", fs32_to_cpu(sb, cg->cg_frotor)); 199 printk(" irotor: %u\n", fs32_to_cpu(sb, cg->cg_irotor)); 200 printk(" frsum: %u, %u, %u, %u, %u, %u, %u, %u\n", 201 fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]), 202 fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]), 203 fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]), 204 fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7])); 205 printk(" btotoff: %u\n", fs32_to_cpu(sb, cg->cg_btotoff)); 206 printk(" boff: %u\n", fs32_to_cpu(sb, cg->cg_boff)); 207 printk(" iuseoff: %u\n", fs32_to_cpu(sb, cg->cg_iusedoff)); 208 printk(" freeoff: %u\n", fs32_to_cpu(sb, cg->cg_freeoff)); 209 printk(" nextfreeoff: %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff)); 210 printk(" clustersumoff %u\n", 211 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff)); 212 printk(" clusteroff %u\n", 213 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff)); 214 printk(" nclusterblks %u\n", 215 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks)); 216 printk("\n"); 217 } 218 #else 219 # define ufs_print_super_stuff(sb, usb1, usb2, usb3) /**/ 220 # define ufs_print_cylinder_stuff(sb, cg) /**/ 221 #endif /* CONFIG_UFS_DEBUG */ 222 223 static const struct super_operations ufs_super_ops; 224 225 static char error_buf[1024]; 226 227 void ufs_error (struct super_block * sb, const char * function, 228 const char * fmt, ...) 229 { 230 struct ufs_sb_private_info * uspi; 231 struct ufs_super_block_first * usb1; 232 va_list args; 233 234 uspi = UFS_SB(sb)->s_uspi; 235 usb1 = ubh_get_usb_first(uspi); 236 237 if (!(sb->s_flags & MS_RDONLY)) { 238 usb1->fs_clean = UFS_FSBAD; 239 ubh_mark_buffer_dirty(USPI_UBH(uspi)); 240 sb->s_dirt = 1; 241 sb->s_flags |= MS_RDONLY; 242 } 243 va_start (args, fmt); 244 vsnprintf (error_buf, sizeof(error_buf), fmt, args); 245 va_end (args); 246 switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) { 247 case UFS_MOUNT_ONERROR_PANIC: 248 panic ("UFS-fs panic (device %s): %s: %s\n", 249 sb->s_id, function, error_buf); 250 251 case UFS_MOUNT_ONERROR_LOCK: 252 case UFS_MOUNT_ONERROR_UMOUNT: 253 case UFS_MOUNT_ONERROR_REPAIR: 254 printk (KERN_CRIT "UFS-fs error (device %s): %s: %s\n", 255 sb->s_id, function, error_buf); 256 } 257 } 258 259 void ufs_panic (struct super_block * sb, const char * function, 260 const char * fmt, ...) 261 { 262 struct ufs_sb_private_info * uspi; 263 struct ufs_super_block_first * usb1; 264 va_list args; 265 266 uspi = UFS_SB(sb)->s_uspi; 267 usb1 = ubh_get_usb_first(uspi); 268 269 if (!(sb->s_flags & MS_RDONLY)) { 270 usb1->fs_clean = UFS_FSBAD; 271 ubh_mark_buffer_dirty(USPI_UBH(uspi)); 272 sb->s_dirt = 1; 273 } 274 va_start (args, fmt); 275 vsnprintf (error_buf, sizeof(error_buf), fmt, args); 276 va_end (args); 277 sb->s_flags |= MS_RDONLY; 278 printk (KERN_CRIT "UFS-fs panic (device %s): %s: %s\n", 279 sb->s_id, function, error_buf); 280 } 281 282 void ufs_warning (struct super_block * sb, const char * function, 283 const char * fmt, ...) 284 { 285 va_list args; 286 287 va_start (args, fmt); 288 vsnprintf (error_buf, sizeof(error_buf), fmt, args); 289 va_end (args); 290 printk (KERN_WARNING "UFS-fs warning (device %s): %s: %s\n", 291 sb->s_id, function, error_buf); 292 } 293 294 enum { 295 Opt_type_old = UFS_MOUNT_UFSTYPE_OLD, 296 Opt_type_sunx86 = UFS_MOUNT_UFSTYPE_SUNx86, 297 Opt_type_sun = UFS_MOUNT_UFSTYPE_SUN, 298 Opt_type_sunos = UFS_MOUNT_UFSTYPE_SUNOS, 299 Opt_type_44bsd = UFS_MOUNT_UFSTYPE_44BSD, 300 Opt_type_ufs2 = UFS_MOUNT_UFSTYPE_UFS2, 301 Opt_type_hp = UFS_MOUNT_UFSTYPE_HP, 302 Opt_type_nextstepcd = UFS_MOUNT_UFSTYPE_NEXTSTEP_CD, 303 Opt_type_nextstep = UFS_MOUNT_UFSTYPE_NEXTSTEP, 304 Opt_type_openstep = UFS_MOUNT_UFSTYPE_OPENSTEP, 305 Opt_onerror_panic = UFS_MOUNT_ONERROR_PANIC, 306 Opt_onerror_lock = UFS_MOUNT_ONERROR_LOCK, 307 Opt_onerror_umount = UFS_MOUNT_ONERROR_UMOUNT, 308 Opt_onerror_repair = UFS_MOUNT_ONERROR_REPAIR, 309 Opt_err 310 }; 311 312 static const match_table_t tokens = { 313 {Opt_type_old, "ufstype=old"}, 314 {Opt_type_sunx86, "ufstype=sunx86"}, 315 {Opt_type_sun, "ufstype=sun"}, 316 {Opt_type_sunos, "ufstype=sunos"}, 317 {Opt_type_44bsd, "ufstype=44bsd"}, 318 {Opt_type_ufs2, "ufstype=ufs2"}, 319 {Opt_type_ufs2, "ufstype=5xbsd"}, 320 {Opt_type_hp, "ufstype=hp"}, 321 {Opt_type_nextstepcd, "ufstype=nextstep-cd"}, 322 {Opt_type_nextstep, "ufstype=nextstep"}, 323 {Opt_type_openstep, "ufstype=openstep"}, 324 /*end of possible ufs types */ 325 {Opt_onerror_panic, "onerror=panic"}, 326 {Opt_onerror_lock, "onerror=lock"}, 327 {Opt_onerror_umount, "onerror=umount"}, 328 {Opt_onerror_repair, "onerror=repair"}, 329 {Opt_err, NULL} 330 }; 331 332 static int ufs_parse_options (char * options, unsigned * mount_options) 333 { 334 char * p; 335 336 UFSD("ENTER\n"); 337 338 if (!options) 339 return 1; 340 341 while ((p = strsep(&options, ",")) != NULL) { 342 substring_t args[MAX_OPT_ARGS]; 343 int token; 344 if (!*p) 345 continue; 346 347 token = match_token(p, tokens, args); 348 switch (token) { 349 case Opt_type_old: 350 ufs_clear_opt (*mount_options, UFSTYPE); 351 ufs_set_opt (*mount_options, UFSTYPE_OLD); 352 break; 353 case Opt_type_sunx86: 354 ufs_clear_opt (*mount_options, UFSTYPE); 355 ufs_set_opt (*mount_options, UFSTYPE_SUNx86); 356 break; 357 case Opt_type_sun: 358 ufs_clear_opt (*mount_options, UFSTYPE); 359 ufs_set_opt (*mount_options, UFSTYPE_SUN); 360 break; 361 case Opt_type_sunos: 362 ufs_clear_opt(*mount_options, UFSTYPE); 363 ufs_set_opt(*mount_options, UFSTYPE_SUNOS); 364 break; 365 case Opt_type_44bsd: 366 ufs_clear_opt (*mount_options, UFSTYPE); 367 ufs_set_opt (*mount_options, UFSTYPE_44BSD); 368 break; 369 case Opt_type_ufs2: 370 ufs_clear_opt(*mount_options, UFSTYPE); 371 ufs_set_opt(*mount_options, UFSTYPE_UFS2); 372 break; 373 case Opt_type_hp: 374 ufs_clear_opt (*mount_options, UFSTYPE); 375 ufs_set_opt (*mount_options, UFSTYPE_HP); 376 break; 377 case Opt_type_nextstepcd: 378 ufs_clear_opt (*mount_options, UFSTYPE); 379 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD); 380 break; 381 case Opt_type_nextstep: 382 ufs_clear_opt (*mount_options, UFSTYPE); 383 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP); 384 break; 385 case Opt_type_openstep: 386 ufs_clear_opt (*mount_options, UFSTYPE); 387 ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP); 388 break; 389 case Opt_onerror_panic: 390 ufs_clear_opt (*mount_options, ONERROR); 391 ufs_set_opt (*mount_options, ONERROR_PANIC); 392 break; 393 case Opt_onerror_lock: 394 ufs_clear_opt (*mount_options, ONERROR); 395 ufs_set_opt (*mount_options, ONERROR_LOCK); 396 break; 397 case Opt_onerror_umount: 398 ufs_clear_opt (*mount_options, ONERROR); 399 ufs_set_opt (*mount_options, ONERROR_UMOUNT); 400 break; 401 case Opt_onerror_repair: 402 printk("UFS-fs: Unable to do repair on error, " 403 "will lock lock instead\n"); 404 ufs_clear_opt (*mount_options, ONERROR); 405 ufs_set_opt (*mount_options, ONERROR_REPAIR); 406 break; 407 default: 408 printk("UFS-fs: Invalid option: \"%s\" " 409 "or missing value\n", p); 410 return 0; 411 } 412 } 413 return 1; 414 } 415 416 /* 417 * Diffrent types of UFS hold fs_cstotal in different 418 * places, and use diffrent data structure for it. 419 * To make things simplier we just copy fs_cstotal to ufs_sb_private_info 420 */ 421 static void ufs_setup_cstotal(struct super_block *sb) 422 { 423 struct ufs_sb_info *sbi = UFS_SB(sb); 424 struct ufs_sb_private_info *uspi = sbi->s_uspi; 425 struct ufs_super_block_first *usb1; 426 struct ufs_super_block_second *usb2; 427 struct ufs_super_block_third *usb3; 428 unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE; 429 430 UFSD("ENTER, mtype=%u\n", mtype); 431 usb1 = ubh_get_usb_first(uspi); 432 usb2 = ubh_get_usb_second(uspi); 433 usb3 = ubh_get_usb_third(uspi); 434 435 if ((mtype == UFS_MOUNT_UFSTYPE_44BSD && 436 (usb1->fs_flags & UFS_FLAGS_UPDATED)) || 437 mtype == UFS_MOUNT_UFSTYPE_UFS2) { 438 /*we have statistic in different place, then usual*/ 439 uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir); 440 uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree); 441 uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree); 442 uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree); 443 } else { 444 uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir); 445 uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree); 446 uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree); 447 uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree); 448 } 449 UFSD("EXIT\n"); 450 } 451 452 /* 453 * Read on-disk structures associated with cylinder groups 454 */ 455 static int ufs_read_cylinder_structures(struct super_block *sb) 456 { 457 struct ufs_sb_info *sbi = UFS_SB(sb); 458 struct ufs_sb_private_info *uspi = sbi->s_uspi; 459 struct ufs_buffer_head * ubh; 460 unsigned char * base, * space; 461 unsigned size, blks, i; 462 struct ufs_super_block_third *usb3; 463 464 UFSD("ENTER\n"); 465 466 usb3 = ubh_get_usb_third(uspi); 467 /* 468 * Read cs structures from (usually) first data block 469 * on the device. 470 */ 471 size = uspi->s_cssize; 472 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift; 473 base = space = kmalloc(size, GFP_KERNEL); 474 if (!base) 475 goto failed; 476 sbi->s_csp = (struct ufs_csum *)space; 477 for (i = 0; i < blks; i += uspi->s_fpb) { 478 size = uspi->s_bsize; 479 if (i + uspi->s_fpb > blks) 480 size = (blks - i) * uspi->s_fsize; 481 482 ubh = ubh_bread(sb, uspi->s_csaddr + i, size); 483 484 if (!ubh) 485 goto failed; 486 487 ubh_ubhcpymem (space, ubh, size); 488 489 space += size; 490 ubh_brelse (ubh); 491 ubh = NULL; 492 } 493 494 /* 495 * Read cylinder group (we read only first fragment from block 496 * at this time) and prepare internal data structures for cg caching. 497 */ 498 if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_KERNEL))) 499 goto failed; 500 for (i = 0; i < uspi->s_ncg; i++) 501 sbi->s_ucg[i] = NULL; 502 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) { 503 sbi->s_ucpi[i] = NULL; 504 sbi->s_cgno[i] = UFS_CGNO_EMPTY; 505 } 506 for (i = 0; i < uspi->s_ncg; i++) { 507 UFSD("read cg %u\n", i); 508 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i)))) 509 goto failed; 510 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data)) 511 goto failed; 512 513 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data); 514 } 515 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) { 516 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_KERNEL))) 517 goto failed; 518 sbi->s_cgno[i] = UFS_CGNO_EMPTY; 519 } 520 sbi->s_cg_loaded = 0; 521 UFSD("EXIT\n"); 522 return 1; 523 524 failed: 525 kfree (base); 526 if (sbi->s_ucg) { 527 for (i = 0; i < uspi->s_ncg; i++) 528 if (sbi->s_ucg[i]) 529 brelse (sbi->s_ucg[i]); 530 kfree (sbi->s_ucg); 531 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) 532 kfree (sbi->s_ucpi[i]); 533 } 534 UFSD("EXIT (FAILED)\n"); 535 return 0; 536 } 537 538 /* 539 * Sync our internal copy of fs_cstotal with disk 540 */ 541 static void ufs_put_cstotal(struct super_block *sb) 542 { 543 unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE; 544 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 545 struct ufs_super_block_first *usb1; 546 struct ufs_super_block_second *usb2; 547 struct ufs_super_block_third *usb3; 548 549 UFSD("ENTER\n"); 550 usb1 = ubh_get_usb_first(uspi); 551 usb2 = ubh_get_usb_second(uspi); 552 usb3 = ubh_get_usb_third(uspi); 553 554 if ((mtype == UFS_MOUNT_UFSTYPE_44BSD && 555 (usb1->fs_flags & UFS_FLAGS_UPDATED)) || 556 mtype == UFS_MOUNT_UFSTYPE_UFS2) { 557 /*we have statistic in different place, then usual*/ 558 usb2->fs_un.fs_u2.cs_ndir = 559 cpu_to_fs64(sb, uspi->cs_total.cs_ndir); 560 usb2->fs_un.fs_u2.cs_nbfree = 561 cpu_to_fs64(sb, uspi->cs_total.cs_nbfree); 562 usb3->fs_un1.fs_u2.cs_nifree = 563 cpu_to_fs64(sb, uspi->cs_total.cs_nifree); 564 usb3->fs_un1.fs_u2.cs_nffree = 565 cpu_to_fs64(sb, uspi->cs_total.cs_nffree); 566 } else { 567 usb1->fs_cstotal.cs_ndir = 568 cpu_to_fs32(sb, uspi->cs_total.cs_ndir); 569 usb1->fs_cstotal.cs_nbfree = 570 cpu_to_fs32(sb, uspi->cs_total.cs_nbfree); 571 usb1->fs_cstotal.cs_nifree = 572 cpu_to_fs32(sb, uspi->cs_total.cs_nifree); 573 usb1->fs_cstotal.cs_nffree = 574 cpu_to_fs32(sb, uspi->cs_total.cs_nffree); 575 } 576 ubh_mark_buffer_dirty(USPI_UBH(uspi)); 577 ufs_print_super_stuff(sb, usb1, usb2, usb3); 578 UFSD("EXIT\n"); 579 } 580 581 /** 582 * ufs_put_super_internal() - put on-disk intrenal structures 583 * @sb: pointer to super_block structure 584 * Put on-disk structures associated with cylinder groups 585 * and write them back to disk, also update cs_total on disk 586 */ 587 static void ufs_put_super_internal(struct super_block *sb) 588 { 589 struct ufs_sb_info *sbi = UFS_SB(sb); 590 struct ufs_sb_private_info *uspi = sbi->s_uspi; 591 struct ufs_buffer_head * ubh; 592 unsigned char * base, * space; 593 unsigned blks, size, i; 594 595 596 UFSD("ENTER\n"); 597 ufs_put_cstotal(sb); 598 size = uspi->s_cssize; 599 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift; 600 base = space = (char*) sbi->s_csp; 601 for (i = 0; i < blks; i += uspi->s_fpb) { 602 size = uspi->s_bsize; 603 if (i + uspi->s_fpb > blks) 604 size = (blks - i) * uspi->s_fsize; 605 606 ubh = ubh_bread(sb, uspi->s_csaddr + i, size); 607 608 ubh_memcpyubh (ubh, space, size); 609 space += size; 610 ubh_mark_buffer_uptodate (ubh, 1); 611 ubh_mark_buffer_dirty (ubh); 612 ubh_brelse (ubh); 613 } 614 for (i = 0; i < sbi->s_cg_loaded; i++) { 615 ufs_put_cylinder (sb, i); 616 kfree (sbi->s_ucpi[i]); 617 } 618 for (; i < UFS_MAX_GROUP_LOADED; i++) 619 kfree (sbi->s_ucpi[i]); 620 for (i = 0; i < uspi->s_ncg; i++) 621 brelse (sbi->s_ucg[i]); 622 kfree (sbi->s_ucg); 623 kfree (base); 624 UFSD("EXIT\n"); 625 } 626 627 static int ufs_fill_super(struct super_block *sb, void *data, int silent) 628 { 629 struct ufs_sb_info * sbi; 630 struct ufs_sb_private_info * uspi; 631 struct ufs_super_block_first * usb1; 632 struct ufs_super_block_second * usb2; 633 struct ufs_super_block_third * usb3; 634 struct ufs_buffer_head * ubh; 635 struct inode *inode; 636 unsigned block_size, super_block_size; 637 unsigned flags; 638 unsigned super_block_offset; 639 int ret = -EINVAL; 640 641 uspi = NULL; 642 ubh = NULL; 643 flags = 0; 644 645 UFSD("ENTER\n"); 646 647 sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL); 648 if (!sbi) 649 goto failed_nomem; 650 sb->s_fs_info = sbi; 651 652 UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY)); 653 654 #ifndef CONFIG_UFS_FS_WRITE 655 if (!(sb->s_flags & MS_RDONLY)) { 656 printk("ufs was compiled with read-only support, " 657 "can't be mounted as read-write\n"); 658 goto failed; 659 } 660 #endif 661 /* 662 * Set default mount options 663 * Parse mount options 664 */ 665 sbi->s_mount_opt = 0; 666 ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK); 667 if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) { 668 printk("wrong mount options\n"); 669 goto failed; 670 } 671 if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) { 672 if (!silent) 673 printk("You didn't specify the type of your ufs filesystem\n\n" 674 "mount -t ufs -o ufstype=" 675 "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n" 676 ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, " 677 "default is ufstype=old\n"); 678 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD); 679 } 680 681 uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL); 682 sbi->s_uspi = uspi; 683 if (!uspi) 684 goto failed; 685 uspi->s_dirblksize = UFS_SECTOR_SIZE; 686 super_block_offset=UFS_SBLOCK; 687 688 /* Keep 2Gig file limit. Some UFS variants need to override 689 this but as I don't know which I'll let those in the know loosen 690 the rules */ 691 switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) { 692 case UFS_MOUNT_UFSTYPE_44BSD: 693 UFSD("ufstype=44bsd\n"); 694 uspi->s_fsize = block_size = 512; 695 uspi->s_fmask = ~(512 - 1); 696 uspi->s_fshift = 9; 697 uspi->s_sbsize = super_block_size = 1536; 698 uspi->s_sbbase = 0; 699 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; 700 break; 701 case UFS_MOUNT_UFSTYPE_UFS2: 702 UFSD("ufstype=ufs2\n"); 703 super_block_offset=SBLOCK_UFS2; 704 uspi->s_fsize = block_size = 512; 705 uspi->s_fmask = ~(512 - 1); 706 uspi->s_fshift = 9; 707 uspi->s_sbsize = super_block_size = 1536; 708 uspi->s_sbbase = 0; 709 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; 710 break; 711 712 case UFS_MOUNT_UFSTYPE_SUN: 713 UFSD("ufstype=sun\n"); 714 uspi->s_fsize = block_size = 1024; 715 uspi->s_fmask = ~(1024 - 1); 716 uspi->s_fshift = 10; 717 uspi->s_sbsize = super_block_size = 2048; 718 uspi->s_sbbase = 0; 719 uspi->s_maxsymlinklen = 0; /* Not supported on disk */ 720 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN; 721 break; 722 723 case UFS_MOUNT_UFSTYPE_SUNOS: 724 UFSD(("ufstype=sunos\n")) 725 uspi->s_fsize = block_size = 1024; 726 uspi->s_fmask = ~(1024 - 1); 727 uspi->s_fshift = 10; 728 uspi->s_sbsize = 2048; 729 super_block_size = 2048; 730 uspi->s_sbbase = 0; 731 uspi->s_maxsymlinklen = 0; /* Not supported on disk */ 732 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_SUNOS | UFS_CG_SUN; 733 break; 734 735 case UFS_MOUNT_UFSTYPE_SUNx86: 736 UFSD("ufstype=sunx86\n"); 737 uspi->s_fsize = block_size = 1024; 738 uspi->s_fmask = ~(1024 - 1); 739 uspi->s_fshift = 10; 740 uspi->s_sbsize = super_block_size = 2048; 741 uspi->s_sbbase = 0; 742 uspi->s_maxsymlinklen = 0; /* Not supported on disk */ 743 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN; 744 break; 745 746 case UFS_MOUNT_UFSTYPE_OLD: 747 UFSD("ufstype=old\n"); 748 uspi->s_fsize = block_size = 1024; 749 uspi->s_fmask = ~(1024 - 1); 750 uspi->s_fshift = 10; 751 uspi->s_sbsize = super_block_size = 2048; 752 uspi->s_sbbase = 0; 753 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 754 if (!(sb->s_flags & MS_RDONLY)) { 755 if (!silent) 756 printk(KERN_INFO "ufstype=old is supported read-only\n"); 757 sb->s_flags |= MS_RDONLY; 758 } 759 break; 760 761 case UFS_MOUNT_UFSTYPE_NEXTSTEP: 762 UFSD("ufstype=nextstep\n"); 763 uspi->s_fsize = block_size = 1024; 764 uspi->s_fmask = ~(1024 - 1); 765 uspi->s_fshift = 10; 766 uspi->s_sbsize = super_block_size = 2048; 767 uspi->s_sbbase = 0; 768 uspi->s_dirblksize = 1024; 769 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 770 if (!(sb->s_flags & MS_RDONLY)) { 771 if (!silent) 772 printk(KERN_INFO "ufstype=nextstep is supported read-only\n"); 773 sb->s_flags |= MS_RDONLY; 774 } 775 break; 776 777 case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD: 778 UFSD("ufstype=nextstep-cd\n"); 779 uspi->s_fsize = block_size = 2048; 780 uspi->s_fmask = ~(2048 - 1); 781 uspi->s_fshift = 11; 782 uspi->s_sbsize = super_block_size = 2048; 783 uspi->s_sbbase = 0; 784 uspi->s_dirblksize = 1024; 785 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 786 if (!(sb->s_flags & MS_RDONLY)) { 787 if (!silent) 788 printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n"); 789 sb->s_flags |= MS_RDONLY; 790 } 791 break; 792 793 case UFS_MOUNT_UFSTYPE_OPENSTEP: 794 UFSD("ufstype=openstep\n"); 795 uspi->s_fsize = block_size = 1024; 796 uspi->s_fmask = ~(1024 - 1); 797 uspi->s_fshift = 10; 798 uspi->s_sbsize = super_block_size = 2048; 799 uspi->s_sbbase = 0; 800 uspi->s_dirblksize = 1024; 801 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; 802 if (!(sb->s_flags & MS_RDONLY)) { 803 if (!silent) 804 printk(KERN_INFO "ufstype=openstep is supported read-only\n"); 805 sb->s_flags |= MS_RDONLY; 806 } 807 break; 808 809 case UFS_MOUNT_UFSTYPE_HP: 810 UFSD("ufstype=hp\n"); 811 uspi->s_fsize = block_size = 1024; 812 uspi->s_fmask = ~(1024 - 1); 813 uspi->s_fshift = 10; 814 uspi->s_sbsize = super_block_size = 2048; 815 uspi->s_sbbase = 0; 816 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 817 if (!(sb->s_flags & MS_RDONLY)) { 818 if (!silent) 819 printk(KERN_INFO "ufstype=hp is supported read-only\n"); 820 sb->s_flags |= MS_RDONLY; 821 } 822 break; 823 default: 824 if (!silent) 825 printk("unknown ufstype\n"); 826 goto failed; 827 } 828 829 again: 830 if (!sb_set_blocksize(sb, block_size)) { 831 printk(KERN_ERR "UFS: failed to set blocksize\n"); 832 goto failed; 833 } 834 835 /* 836 * read ufs super block from device 837 */ 838 839 ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size); 840 841 if (!ubh) 842 goto failed; 843 844 usb1 = ubh_get_usb_first(uspi); 845 usb2 = ubh_get_usb_second(uspi); 846 usb3 = ubh_get_usb_third(uspi); 847 848 /* Sort out mod used on SunOS 4.1.3 for fs_state */ 849 uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat); 850 if (((flags & UFS_ST_MASK) == UFS_ST_SUNOS) && 851 (uspi->s_postblformat != UFS_42POSTBLFMT)) { 852 flags &= ~UFS_ST_MASK; 853 flags |= UFS_ST_SUN; 854 } 855 856 /* 857 * Check ufs magic number 858 */ 859 sbi->s_bytesex = BYTESEX_LE; 860 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) { 861 case UFS_MAGIC: 862 case UFS2_MAGIC: 863 case UFS_MAGIC_LFN: 864 case UFS_MAGIC_FEA: 865 case UFS_MAGIC_4GB: 866 goto magic_found; 867 } 868 sbi->s_bytesex = BYTESEX_BE; 869 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) { 870 case UFS_MAGIC: 871 case UFS2_MAGIC: 872 case UFS_MAGIC_LFN: 873 case UFS_MAGIC_FEA: 874 case UFS_MAGIC_4GB: 875 goto magic_found; 876 } 877 878 if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP) 879 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD) 880 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP)) 881 && uspi->s_sbbase < 256) { 882 ubh_brelse_uspi(uspi); 883 ubh = NULL; 884 uspi->s_sbbase += 8; 885 goto again; 886 } 887 if (!silent) 888 printk("ufs_read_super: bad magic number\n"); 889 goto failed; 890 891 magic_found: 892 /* 893 * Check block and fragment sizes 894 */ 895 uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize); 896 uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize); 897 uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize); 898 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask); 899 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift); 900 901 if (!is_power_of_2(uspi->s_fsize)) { 902 printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n", 903 uspi->s_fsize); 904 goto failed; 905 } 906 if (uspi->s_fsize < 512) { 907 printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n", 908 uspi->s_fsize); 909 goto failed; 910 } 911 if (uspi->s_fsize > 4096) { 912 printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n", 913 uspi->s_fsize); 914 goto failed; 915 } 916 if (!is_power_of_2(uspi->s_bsize)) { 917 printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n", 918 uspi->s_bsize); 919 goto failed; 920 } 921 if (uspi->s_bsize < 4096) { 922 printk(KERN_ERR "ufs_read_super: block size %u is too small\n", 923 uspi->s_bsize); 924 goto failed; 925 } 926 if (uspi->s_bsize / uspi->s_fsize > 8) { 927 printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n", 928 uspi->s_bsize / uspi->s_fsize); 929 goto failed; 930 } 931 if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) { 932 ubh_brelse_uspi(uspi); 933 ubh = NULL; 934 block_size = uspi->s_fsize; 935 super_block_size = uspi->s_sbsize; 936 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size); 937 goto again; 938 } 939 940 sbi->s_flags = flags;/*after that line some functions use s_flags*/ 941 ufs_print_super_stuff(sb, usb1, usb2, usb3); 942 943 /* 944 * Check, if file system was correctly unmounted. 945 * If not, make it read only. 946 */ 947 if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) || 948 ((flags & UFS_ST_MASK) == UFS_ST_OLD) || 949 (((flags & UFS_ST_MASK) == UFS_ST_SUN || 950 (flags & UFS_ST_MASK) == UFS_ST_SUNOS || 951 (flags & UFS_ST_MASK) == UFS_ST_SUNx86) && 952 (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) { 953 switch(usb1->fs_clean) { 954 case UFS_FSCLEAN: 955 UFSD("fs is clean\n"); 956 break; 957 case UFS_FSSTABLE: 958 UFSD("fs is stable\n"); 959 break; 960 case UFS_FSOSF1: 961 UFSD("fs is DEC OSF/1\n"); 962 break; 963 case UFS_FSACTIVE: 964 printk("ufs_read_super: fs is active\n"); 965 sb->s_flags |= MS_RDONLY; 966 break; 967 case UFS_FSBAD: 968 printk("ufs_read_super: fs is bad\n"); 969 sb->s_flags |= MS_RDONLY; 970 break; 971 default: 972 printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean); 973 sb->s_flags |= MS_RDONLY; 974 break; 975 } 976 } else { 977 printk("ufs_read_super: fs needs fsck\n"); 978 sb->s_flags |= MS_RDONLY; 979 } 980 981 /* 982 * Read ufs_super_block into internal data structures 983 */ 984 sb->s_op = &ufs_super_ops; 985 sb->dq_op = NULL; /***/ 986 sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic); 987 988 uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno); 989 uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno); 990 uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno); 991 uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno); 992 uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset); 993 uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask); 994 995 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { 996 uspi->s_u2_size = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size); 997 uspi->s_u2_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize); 998 } else { 999 uspi->s_size = fs32_to_cpu(sb, usb1->fs_size); 1000 uspi->s_dsize = fs32_to_cpu(sb, usb1->fs_dsize); 1001 } 1002 1003 uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg); 1004 /* s_bsize already set */ 1005 /* s_fsize already set */ 1006 uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag); 1007 uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree); 1008 uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask); 1009 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask); 1010 uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift); 1011 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift); 1012 UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift, 1013 uspi->s_fshift); 1014 uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift); 1015 uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb); 1016 /* s_sbsize already set */ 1017 uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask); 1018 uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift); 1019 uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir); 1020 uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb); 1021 uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf); 1022 uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3); 1023 uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave); 1024 uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew); 1025 1026 if (uspi->fs_magic == UFS2_MAGIC) 1027 uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr); 1028 else 1029 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr); 1030 1031 uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize); 1032 uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize); 1033 uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak); 1034 uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect); 1035 uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc); 1036 uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg); 1037 uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg); 1038 uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc); 1039 uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize); 1040 uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3); 1041 uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3); 1042 uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos); 1043 uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff); 1044 uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff); 1045 1046 /* 1047 * Compute another frequently used values 1048 */ 1049 uspi->s_fpbmask = uspi->s_fpb - 1; 1050 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) 1051 uspi->s_apbshift = uspi->s_bshift - 3; 1052 else 1053 uspi->s_apbshift = uspi->s_bshift - 2; 1054 1055 uspi->s_2apbshift = uspi->s_apbshift * 2; 1056 uspi->s_3apbshift = uspi->s_apbshift * 3; 1057 uspi->s_apb = 1 << uspi->s_apbshift; 1058 uspi->s_2apb = 1 << uspi->s_2apbshift; 1059 uspi->s_3apb = 1 << uspi->s_3apbshift; 1060 uspi->s_apbmask = uspi->s_apb - 1; 1061 uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS; 1062 uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift; 1063 uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift; 1064 uspi->s_bpf = uspi->s_fsize << 3; 1065 uspi->s_bpfshift = uspi->s_fshift + 3; 1066 uspi->s_bpfmask = uspi->s_bpf - 1; 1067 if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_44BSD || 1068 (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_UFS2) 1069 uspi->s_maxsymlinklen = 1070 fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen); 1071 1072 inode = ufs_iget(sb, UFS_ROOTINO); 1073 if (IS_ERR(inode)) { 1074 ret = PTR_ERR(inode); 1075 goto failed; 1076 } 1077 sb->s_root = d_alloc_root(inode); 1078 if (!sb->s_root) { 1079 ret = -ENOMEM; 1080 goto dalloc_failed; 1081 } 1082 1083 ufs_setup_cstotal(sb); 1084 /* 1085 * Read cylinder group structures 1086 */ 1087 if (!(sb->s_flags & MS_RDONLY)) 1088 if (!ufs_read_cylinder_structures(sb)) 1089 goto failed; 1090 1091 UFSD("EXIT\n"); 1092 return 0; 1093 1094 dalloc_failed: 1095 iput(inode); 1096 failed: 1097 if (ubh) 1098 ubh_brelse_uspi (uspi); 1099 kfree (uspi); 1100 kfree(sbi); 1101 sb->s_fs_info = NULL; 1102 UFSD("EXIT (FAILED)\n"); 1103 return ret; 1104 1105 failed_nomem: 1106 UFSD("EXIT (NOMEM)\n"); 1107 return -ENOMEM; 1108 } 1109 1110 static void ufs_write_super(struct super_block *sb) 1111 { 1112 struct ufs_sb_private_info * uspi; 1113 struct ufs_super_block_first * usb1; 1114 struct ufs_super_block_third * usb3; 1115 unsigned flags; 1116 1117 lock_kernel(); 1118 UFSD("ENTER\n"); 1119 flags = UFS_SB(sb)->s_flags; 1120 uspi = UFS_SB(sb)->s_uspi; 1121 usb1 = ubh_get_usb_first(uspi); 1122 usb3 = ubh_get_usb_third(uspi); 1123 1124 if (!(sb->s_flags & MS_RDONLY)) { 1125 usb1->fs_time = cpu_to_fs32(sb, get_seconds()); 1126 if ((flags & UFS_ST_MASK) == UFS_ST_SUN 1127 || (flags & UFS_ST_MASK) == UFS_ST_SUNOS 1128 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86) 1129 ufs_set_fs_state(sb, usb1, usb3, 1130 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time)); 1131 ufs_put_cstotal(sb); 1132 } 1133 sb->s_dirt = 0; 1134 UFSD("EXIT\n"); 1135 unlock_kernel(); 1136 } 1137 1138 static void ufs_put_super(struct super_block *sb) 1139 { 1140 struct ufs_sb_info * sbi = UFS_SB(sb); 1141 1142 UFSD("ENTER\n"); 1143 1144 if (!(sb->s_flags & MS_RDONLY)) 1145 ufs_put_super_internal(sb); 1146 1147 ubh_brelse_uspi (sbi->s_uspi); 1148 kfree (sbi->s_uspi); 1149 kfree (sbi); 1150 sb->s_fs_info = NULL; 1151 UFSD("EXIT\n"); 1152 return; 1153 } 1154 1155 1156 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data) 1157 { 1158 struct ufs_sb_private_info * uspi; 1159 struct ufs_super_block_first * usb1; 1160 struct ufs_super_block_third * usb3; 1161 unsigned new_mount_opt, ufstype; 1162 unsigned flags; 1163 1164 uspi = UFS_SB(sb)->s_uspi; 1165 flags = UFS_SB(sb)->s_flags; 1166 usb1 = ubh_get_usb_first(uspi); 1167 usb3 = ubh_get_usb_third(uspi); 1168 1169 /* 1170 * Allow the "check" option to be passed as a remount option. 1171 * It is not possible to change ufstype option during remount 1172 */ 1173 ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE; 1174 new_mount_opt = 0; 1175 ufs_set_opt (new_mount_opt, ONERROR_LOCK); 1176 if (!ufs_parse_options (data, &new_mount_opt)) 1177 return -EINVAL; 1178 if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) { 1179 new_mount_opt |= ufstype; 1180 } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) { 1181 printk("ufstype can't be changed during remount\n"); 1182 return -EINVAL; 1183 } 1184 1185 if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) { 1186 UFS_SB(sb)->s_mount_opt = new_mount_opt; 1187 return 0; 1188 } 1189 1190 /* 1191 * fs was mouted as rw, remounting ro 1192 */ 1193 if (*mount_flags & MS_RDONLY) { 1194 ufs_put_super_internal(sb); 1195 usb1->fs_time = cpu_to_fs32(sb, get_seconds()); 1196 if ((flags & UFS_ST_MASK) == UFS_ST_SUN 1197 || (flags & UFS_ST_MASK) == UFS_ST_SUNOS 1198 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86) 1199 ufs_set_fs_state(sb, usb1, usb3, 1200 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time)); 1201 ubh_mark_buffer_dirty (USPI_UBH(uspi)); 1202 sb->s_dirt = 0; 1203 sb->s_flags |= MS_RDONLY; 1204 } else { 1205 /* 1206 * fs was mounted as ro, remounting rw 1207 */ 1208 #ifndef CONFIG_UFS_FS_WRITE 1209 printk("ufs was compiled with read-only support, " 1210 "can't be mounted as read-write\n"); 1211 return -EINVAL; 1212 #else 1213 if (ufstype != UFS_MOUNT_UFSTYPE_SUN && 1214 ufstype != UFS_MOUNT_UFSTYPE_SUNOS && 1215 ufstype != UFS_MOUNT_UFSTYPE_44BSD && 1216 ufstype != UFS_MOUNT_UFSTYPE_SUNx86 && 1217 ufstype != UFS_MOUNT_UFSTYPE_UFS2) { 1218 printk("this ufstype is read-only supported\n"); 1219 return -EINVAL; 1220 } 1221 if (!ufs_read_cylinder_structures(sb)) { 1222 printk("failed during remounting\n"); 1223 return -EPERM; 1224 } 1225 sb->s_flags &= ~MS_RDONLY; 1226 #endif 1227 } 1228 UFS_SB(sb)->s_mount_opt = new_mount_opt; 1229 return 0; 1230 } 1231 1232 static int ufs_show_options(struct seq_file *seq, struct vfsmount *vfs) 1233 { 1234 struct ufs_sb_info *sbi = UFS_SB(vfs->mnt_sb); 1235 unsigned mval = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE; 1236 const struct match_token *tp = tokens; 1237 1238 while (tp->token != Opt_onerror_panic && tp->token != mval) 1239 ++tp; 1240 BUG_ON(tp->token == Opt_onerror_panic); 1241 seq_printf(seq, ",%s", tp->pattern); 1242 1243 mval = sbi->s_mount_opt & UFS_MOUNT_ONERROR; 1244 while (tp->token != Opt_err && tp->token != mval) 1245 ++tp; 1246 BUG_ON(tp->token == Opt_err); 1247 seq_printf(seq, ",%s", tp->pattern); 1248 1249 return 0; 1250 } 1251 1252 static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf) 1253 { 1254 struct super_block *sb = dentry->d_sb; 1255 struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi; 1256 unsigned flags = UFS_SB(sb)->s_flags; 1257 struct ufs_super_block_first *usb1; 1258 struct ufs_super_block_second *usb2; 1259 struct ufs_super_block_third *usb3; 1260 1261 lock_kernel(); 1262 1263 usb1 = ubh_get_usb_first(uspi); 1264 usb2 = ubh_get_usb_second(uspi); 1265 usb3 = ubh_get_usb_third(uspi); 1266 1267 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { 1268 buf->f_type = UFS2_MAGIC; 1269 buf->f_blocks = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize); 1270 } else { 1271 buf->f_type = UFS_MAGIC; 1272 buf->f_blocks = uspi->s_dsize; 1273 } 1274 buf->f_bfree = ufs_blkstofrags(uspi->cs_total.cs_nbfree) + 1275 uspi->cs_total.cs_nffree; 1276 buf->f_ffree = uspi->cs_total.cs_nifree; 1277 buf->f_bsize = sb->s_blocksize; 1278 buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree)) 1279 ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0; 1280 buf->f_files = uspi->s_ncg * uspi->s_ipg; 1281 buf->f_namelen = UFS_MAXNAMLEN; 1282 1283 unlock_kernel(); 1284 1285 return 0; 1286 } 1287 1288 static struct kmem_cache * ufs_inode_cachep; 1289 1290 static struct inode *ufs_alloc_inode(struct super_block *sb) 1291 { 1292 struct ufs_inode_info *ei; 1293 ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, GFP_KERNEL); 1294 if (!ei) 1295 return NULL; 1296 ei->vfs_inode.i_version = 1; 1297 return &ei->vfs_inode; 1298 } 1299 1300 static void ufs_destroy_inode(struct inode *inode) 1301 { 1302 kmem_cache_free(ufs_inode_cachep, UFS_I(inode)); 1303 } 1304 1305 static void init_once(void *foo) 1306 { 1307 struct ufs_inode_info *ei = (struct ufs_inode_info *) foo; 1308 1309 inode_init_once(&ei->vfs_inode); 1310 } 1311 1312 static int init_inodecache(void) 1313 { 1314 ufs_inode_cachep = kmem_cache_create("ufs_inode_cache", 1315 sizeof(struct ufs_inode_info), 1316 0, (SLAB_RECLAIM_ACCOUNT| 1317 SLAB_MEM_SPREAD), 1318 init_once); 1319 if (ufs_inode_cachep == NULL) 1320 return -ENOMEM; 1321 return 0; 1322 } 1323 1324 static void destroy_inodecache(void) 1325 { 1326 kmem_cache_destroy(ufs_inode_cachep); 1327 } 1328 1329 #ifdef CONFIG_QUOTA 1330 static ssize_t ufs_quota_read(struct super_block *, int, char *,size_t, loff_t); 1331 static ssize_t ufs_quota_write(struct super_block *, int, const char *, size_t, loff_t); 1332 #endif 1333 1334 static const struct super_operations ufs_super_ops = { 1335 .alloc_inode = ufs_alloc_inode, 1336 .destroy_inode = ufs_destroy_inode, 1337 .write_inode = ufs_write_inode, 1338 .delete_inode = ufs_delete_inode, 1339 .put_super = ufs_put_super, 1340 .write_super = ufs_write_super, 1341 .statfs = ufs_statfs, 1342 .remount_fs = ufs_remount, 1343 .show_options = ufs_show_options, 1344 #ifdef CONFIG_QUOTA 1345 .quota_read = ufs_quota_read, 1346 .quota_write = ufs_quota_write, 1347 #endif 1348 }; 1349 1350 #ifdef CONFIG_QUOTA 1351 1352 /* Read data from quotafile - avoid pagecache and such because we cannot afford 1353 * acquiring the locks... As quota files are never truncated and quota code 1354 * itself serializes the operations (and noone else should touch the files) 1355 * we don't have to be afraid of races */ 1356 static ssize_t ufs_quota_read(struct super_block *sb, int type, char *data, 1357 size_t len, loff_t off) 1358 { 1359 struct inode *inode = sb_dqopt(sb)->files[type]; 1360 sector_t blk = off >> sb->s_blocksize_bits; 1361 int err = 0; 1362 int offset = off & (sb->s_blocksize - 1); 1363 int tocopy; 1364 size_t toread; 1365 struct buffer_head *bh; 1366 loff_t i_size = i_size_read(inode); 1367 1368 if (off > i_size) 1369 return 0; 1370 if (off+len > i_size) 1371 len = i_size-off; 1372 toread = len; 1373 while (toread > 0) { 1374 tocopy = sb->s_blocksize - offset < toread ? 1375 sb->s_blocksize - offset : toread; 1376 1377 bh = ufs_bread(inode, blk, 0, &err); 1378 if (err) 1379 return err; 1380 if (!bh) /* A hole? */ 1381 memset(data, 0, tocopy); 1382 else { 1383 memcpy(data, bh->b_data+offset, tocopy); 1384 brelse(bh); 1385 } 1386 offset = 0; 1387 toread -= tocopy; 1388 data += tocopy; 1389 blk++; 1390 } 1391 return len; 1392 } 1393 1394 /* Write to quotafile */ 1395 static ssize_t ufs_quota_write(struct super_block *sb, int type, 1396 const char *data, size_t len, loff_t off) 1397 { 1398 struct inode *inode = sb_dqopt(sb)->files[type]; 1399 sector_t blk = off >> sb->s_blocksize_bits; 1400 int err = 0; 1401 int offset = off & (sb->s_blocksize - 1); 1402 int tocopy; 1403 size_t towrite = len; 1404 struct buffer_head *bh; 1405 1406 mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); 1407 while (towrite > 0) { 1408 tocopy = sb->s_blocksize - offset < towrite ? 1409 sb->s_blocksize - offset : towrite; 1410 1411 bh = ufs_bread(inode, blk, 1, &err); 1412 if (!bh) 1413 goto out; 1414 lock_buffer(bh); 1415 memcpy(bh->b_data+offset, data, tocopy); 1416 flush_dcache_page(bh->b_page); 1417 set_buffer_uptodate(bh); 1418 mark_buffer_dirty(bh); 1419 unlock_buffer(bh); 1420 brelse(bh); 1421 offset = 0; 1422 towrite -= tocopy; 1423 data += tocopy; 1424 blk++; 1425 } 1426 out: 1427 if (len == towrite) { 1428 mutex_unlock(&inode->i_mutex); 1429 return err; 1430 } 1431 if (inode->i_size < off+len-towrite) 1432 i_size_write(inode, off+len-towrite); 1433 inode->i_version++; 1434 inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC; 1435 mark_inode_dirty(inode); 1436 mutex_unlock(&inode->i_mutex); 1437 return len - towrite; 1438 } 1439 1440 #endif 1441 1442 static int ufs_get_sb(struct file_system_type *fs_type, 1443 int flags, const char *dev_name, void *data, struct vfsmount *mnt) 1444 { 1445 return get_sb_bdev(fs_type, flags, dev_name, data, ufs_fill_super, mnt); 1446 } 1447 1448 static struct file_system_type ufs_fs_type = { 1449 .owner = THIS_MODULE, 1450 .name = "ufs", 1451 .get_sb = ufs_get_sb, 1452 .kill_sb = kill_block_super, 1453 .fs_flags = FS_REQUIRES_DEV, 1454 }; 1455 1456 static int __init init_ufs_fs(void) 1457 { 1458 int err = init_inodecache(); 1459 if (err) 1460 goto out1; 1461 err = register_filesystem(&ufs_fs_type); 1462 if (err) 1463 goto out; 1464 return 0; 1465 out: 1466 destroy_inodecache(); 1467 out1: 1468 return err; 1469 } 1470 1471 static void __exit exit_ufs_fs(void) 1472 { 1473 unregister_filesystem(&ufs_fs_type); 1474 destroy_inodecache(); 1475 } 1476 1477 module_init(init_ufs_fs) 1478 module_exit(exit_ufs_fs) 1479 MODULE_LICENSE("GPL"); 1480