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