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