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 91#include "swab.h" 92#include "util.h" 93 94#ifdef CONFIG_UFS_DEBUG 95/* 96 * Print contents of ufs_super_block, useful for debugging 97 */ 98static void ufs_print_super_stuff(struct super_block *sb, 99 struct ufs_super_block_first *usb1, 100 struct ufs_super_block_second *usb2, 101 struct ufs_super_block_third *usb3) 102{ 103 u32 magic = fs32_to_cpu(sb, usb3->fs_magic); 104 105 printk("ufs_print_super_stuff\n"); 106 printk(" magic: 0x%x\n", magic); 107 if (fs32_to_cpu(sb, usb3->fs_magic) == UFS2_MAGIC) { 108 printk(" fs_size: %llu\n", (unsigned long long) 109 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size)); 110 printk(" fs_dsize: %llu\n", (unsigned long long) 111 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize)); 112 printk(" bsize: %u\n", 113 fs32_to_cpu(sb, usb1->fs_bsize)); 114 printk(" fsize: %u\n", 115 fs32_to_cpu(sb, usb1->fs_fsize)); 116 printk(" fs_volname: %s\n", usb2->fs_un.fs_u2.fs_volname); 117 printk(" fs_sblockloc: %llu\n", (unsigned long long) 118 fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc)); 119 printk(" cs_ndir(No of dirs): %llu\n", (unsigned long long) 120 fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir)); 121 printk(" cs_nbfree(No of free blocks): %llu\n", 122 (unsigned long long) 123 fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree)); 124 printk(KERN_INFO" cs_nifree(Num of free inodes): %llu\n", 125 (unsigned long long) 126 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree)); 127 printk(KERN_INFO" cs_nffree(Num of free frags): %llu\n", 128 (unsigned long long) 129 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree)); 130 } else { 131 printk(" sblkno: %u\n", fs32_to_cpu(sb, usb1->fs_sblkno)); 132 printk(" cblkno: %u\n", fs32_to_cpu(sb, usb1->fs_cblkno)); 133 printk(" iblkno: %u\n", fs32_to_cpu(sb, usb1->fs_iblkno)); 134 printk(" dblkno: %u\n", fs32_to_cpu(sb, usb1->fs_dblkno)); 135 printk(" cgoffset: %u\n", 136 fs32_to_cpu(sb, usb1->fs_cgoffset)); 137 printk(" ~cgmask: 0x%x\n", 138 ~fs32_to_cpu(sb, usb1->fs_cgmask)); 139 printk(" size: %u\n", fs32_to_cpu(sb, usb1->fs_size)); 140 printk(" dsize: %u\n", fs32_to_cpu(sb, usb1->fs_dsize)); 141 printk(" ncg: %u\n", fs32_to_cpu(sb, usb1->fs_ncg)); 142 printk(" bsize: %u\n", fs32_to_cpu(sb, usb1->fs_bsize)); 143 printk(" fsize: %u\n", fs32_to_cpu(sb, usb1->fs_fsize)); 144 printk(" frag: %u\n", fs32_to_cpu(sb, usb1->fs_frag)); 145 printk(" fragshift: %u\n", 146 fs32_to_cpu(sb, usb1->fs_fragshift)); 147 printk(" ~fmask: %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask)); 148 printk(" fshift: %u\n", fs32_to_cpu(sb, usb1->fs_fshift)); 149 printk(" sbsize: %u\n", fs32_to_cpu(sb, usb1->fs_sbsize)); 150 printk(" spc: %u\n", fs32_to_cpu(sb, usb1->fs_spc)); 151 printk(" cpg: %u\n", fs32_to_cpu(sb, usb1->fs_cpg)); 152 printk(" ipg: %u\n", fs32_to_cpu(sb, usb1->fs_ipg)); 153 printk(" fpg: %u\n", fs32_to_cpu(sb, usb1->fs_fpg)); 154 printk(" csaddr: %u\n", fs32_to_cpu(sb, usb1->fs_csaddr)); 155 printk(" cssize: %u\n", fs32_to_cpu(sb, usb1->fs_cssize)); 156 printk(" cgsize: %u\n", fs32_to_cpu(sb, usb1->fs_cgsize)); 157 printk(" fstodb: %u\n", 158 fs32_to_cpu(sb, usb1->fs_fsbtodb)); 159 printk(" nrpos: %u\n", fs32_to_cpu(sb, usb3->fs_nrpos)); 160 printk(" ndir %u\n", 161 fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir)); 162 printk(" nifree %u\n", 163 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree)); 164 printk(" nbfree %u\n", 165 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree)); 166 printk(" nffree %u\n", 167 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree)); 168 } 169 printk("\n"); 170} 171 172/* 173 * Print contents of ufs_cylinder_group, useful for debugging 174 */ 175static void ufs_print_cylinder_stuff(struct super_block *sb, 176 struct ufs_cylinder_group *cg) 177{ 178 printk("\nufs_print_cylinder_stuff\n"); 179 printk("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group)); 180 printk(" magic: %x\n", fs32_to_cpu(sb, cg->cg_magic)); 181 printk(" time: %u\n", fs32_to_cpu(sb, cg->cg_time)); 182 printk(" cgx: %u\n", fs32_to_cpu(sb, cg->cg_cgx)); 183 printk(" ncyl: %u\n", fs16_to_cpu(sb, cg->cg_ncyl)); 184 printk(" niblk: %u\n", fs16_to_cpu(sb, cg->cg_niblk)); 185 printk(" ndblk: %u\n", fs32_to_cpu(sb, cg->cg_ndblk)); 186 printk(" cs_ndir: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir)); 187 printk(" cs_nbfree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree)); 188 printk(" cs_nifree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree)); 189 printk(" cs_nffree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree)); 190 printk(" rotor: %u\n", fs32_to_cpu(sb, cg->cg_rotor)); 191 printk(" frotor: %u\n", fs32_to_cpu(sb, cg->cg_frotor)); 192 printk(" irotor: %u\n", fs32_to_cpu(sb, cg->cg_irotor)); 193 printk(" frsum: %u, %u, %u, %u, %u, %u, %u, %u\n", 194 fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]), 195 fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]), 196 fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]), 197 fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7])); 198 printk(" btotoff: %u\n", fs32_to_cpu(sb, cg->cg_btotoff)); 199 printk(" boff: %u\n", fs32_to_cpu(sb, cg->cg_boff)); 200 printk(" iuseoff: %u\n", fs32_to_cpu(sb, cg->cg_iusedoff)); 201 printk(" freeoff: %u\n", fs32_to_cpu(sb, cg->cg_freeoff)); 202 printk(" nextfreeoff: %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff)); 203 printk(" clustersumoff %u\n", 204 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff)); 205 printk(" clusteroff %u\n", 206 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff)); 207 printk(" nclusterblks %u\n", 208 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks)); 209 printk("\n"); 210} 211#else 212# define ufs_print_super_stuff(sb, usb1, usb2, usb3) /**/ 213# define ufs_print_cylinder_stuff(sb, cg) /**/ 214#endif /* CONFIG_UFS_DEBUG */ 215 216static const struct super_operations ufs_super_ops; 217 218static char error_buf[1024]; 219 220void ufs_error (struct super_block * sb, const char * function, 221 const char * fmt, ...) 222{ 223 struct ufs_sb_private_info * uspi; 224 struct ufs_super_block_first * usb1; 225 va_list args; 226 227 uspi = UFS_SB(sb)->s_uspi; 228 usb1 = ubh_get_usb_first(uspi); 229 230 if (!(sb->s_flags & MS_RDONLY)) { 231 usb1->fs_clean = UFS_FSBAD; 232 ubh_mark_buffer_dirty(USPI_UBH(uspi)); 233 sb->s_dirt = 1; 234 sb->s_flags |= MS_RDONLY; 235 } 236 va_start (args, fmt); 237 vsnprintf (error_buf, sizeof(error_buf), fmt, args); 238 va_end (args); 239 switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) { 240 case UFS_MOUNT_ONERROR_PANIC: 241 panic ("UFS-fs panic (device %s): %s: %s\n", 242 sb->s_id, function, error_buf); 243 244 case UFS_MOUNT_ONERROR_LOCK: 245 case UFS_MOUNT_ONERROR_UMOUNT: 246 case UFS_MOUNT_ONERROR_REPAIR: 247 printk (KERN_CRIT "UFS-fs error (device %s): %s: %s\n", 248 sb->s_id, function, error_buf); 249 } 250} 251 252void ufs_panic (struct super_block * sb, const char * function, 253 const char * fmt, ...) 254{ 255 struct ufs_sb_private_info * uspi; 256 struct ufs_super_block_first * usb1; 257 va_list args; 258 259 uspi = UFS_SB(sb)->s_uspi; 260 usb1 = ubh_get_usb_first(uspi); 261 262 if (!(sb->s_flags & MS_RDONLY)) { 263 usb1->fs_clean = UFS_FSBAD; 264 ubh_mark_buffer_dirty(USPI_UBH(uspi)); 265 sb->s_dirt = 1; 266 } 267 va_start (args, fmt); 268 vsnprintf (error_buf, sizeof(error_buf), fmt, args); 269 va_end (args); 270 sb->s_flags |= MS_RDONLY; 271 printk (KERN_CRIT "UFS-fs panic (device %s): %s: %s\n", 272 sb->s_id, function, error_buf); 273} 274 275void ufs_warning (struct super_block * sb, const char * function, 276 const char * fmt, ...) 277{ 278 va_list args; 279 280 va_start (args, fmt); 281 vsnprintf (error_buf, sizeof(error_buf), fmt, args); 282 va_end (args); 283 printk (KERN_WARNING "UFS-fs warning (device %s): %s: %s\n", 284 sb->s_id, function, error_buf); 285} 286 287enum { 288 Opt_type_old, Opt_type_sunx86, Opt_type_sun, Opt_type_44bsd, 289 Opt_type_ufs2, Opt_type_hp, Opt_type_nextstepcd, Opt_type_nextstep, 290 Opt_type_openstep, Opt_onerror_panic, Opt_onerror_lock, 291 Opt_onerror_umount, Opt_onerror_repair, Opt_err 292}; 293 294static match_table_t tokens = { 295 {Opt_type_old, "ufstype=old"}, 296 {Opt_type_sunx86, "ufstype=sunx86"}, 297 {Opt_type_sun, "ufstype=sun"}, 298 {Opt_type_44bsd, "ufstype=44bsd"}, 299 {Opt_type_ufs2, "ufstype=ufs2"}, 300 {Opt_type_ufs2, "ufstype=5xbsd"}, 301 {Opt_type_hp, "ufstype=hp"}, 302 {Opt_type_nextstepcd, "ufstype=nextstep-cd"}, 303 {Opt_type_nextstep, "ufstype=nextstep"}, 304 {Opt_type_openstep, "ufstype=openstep"}, 305 {Opt_onerror_panic, "onerror=panic"}, 306 {Opt_onerror_lock, "onerror=lock"}, 307 {Opt_onerror_umount, "onerror=umount"}, 308 {Opt_onerror_repair, "onerror=repair"}, 309 {Opt_err, NULL} 310}; 311 312static int ufs_parse_options (char * options, unsigned * mount_options) 313{ 314 char * p; 315 316 UFSD("ENTER\n"); 317 318 if (!options) 319 return 1; 320 321 while ((p = strsep(&options, ",")) != NULL) { 322 substring_t args[MAX_OPT_ARGS]; 323 int token; 324 if (!*p) 325 continue; 326 327 token = match_token(p, tokens, args); 328 switch (token) { 329 case Opt_type_old: 330 ufs_clear_opt (*mount_options, UFSTYPE); 331 ufs_set_opt (*mount_options, UFSTYPE_OLD); 332 break; 333 case Opt_type_sunx86: 334 ufs_clear_opt (*mount_options, UFSTYPE); 335 ufs_set_opt (*mount_options, UFSTYPE_SUNx86); 336 break; 337 case Opt_type_sun: 338 ufs_clear_opt (*mount_options, UFSTYPE); 339 ufs_set_opt (*mount_options, UFSTYPE_SUN); 340 break; 341 case Opt_type_44bsd: 342 ufs_clear_opt (*mount_options, UFSTYPE); 343 ufs_set_opt (*mount_options, UFSTYPE_44BSD); 344 break; 345 case Opt_type_ufs2: 346 ufs_clear_opt(*mount_options, UFSTYPE); 347 ufs_set_opt(*mount_options, UFSTYPE_UFS2); 348 break; 349 case Opt_type_hp: 350 ufs_clear_opt (*mount_options, UFSTYPE); 351 ufs_set_opt (*mount_options, UFSTYPE_HP); 352 break; 353 case Opt_type_nextstepcd: 354 ufs_clear_opt (*mount_options, UFSTYPE); 355 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD); 356 break; 357 case Opt_type_nextstep: 358 ufs_clear_opt (*mount_options, UFSTYPE); 359 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP); 360 break; 361 case Opt_type_openstep: 362 ufs_clear_opt (*mount_options, UFSTYPE); 363 ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP); 364 break; 365 case Opt_onerror_panic: 366 ufs_clear_opt (*mount_options, ONERROR); 367 ufs_set_opt (*mount_options, ONERROR_PANIC); 368 break; 369 case Opt_onerror_lock: 370 ufs_clear_opt (*mount_options, ONERROR); 371 ufs_set_opt (*mount_options, ONERROR_LOCK); 372 break; 373 case Opt_onerror_umount: 374 ufs_clear_opt (*mount_options, ONERROR); 375 ufs_set_opt (*mount_options, ONERROR_UMOUNT); 376 break; 377 case Opt_onerror_repair: 378 printk("UFS-fs: Unable to do repair on error, " 379 "will lock lock instead\n"); 380 ufs_clear_opt (*mount_options, ONERROR); 381 ufs_set_opt (*mount_options, ONERROR_REPAIR); 382 break; 383 default: 384 printk("UFS-fs: Invalid option: \"%s\" " 385 "or missing value\n", p); 386 return 0; 387 } 388 } 389 return 1; 390} 391 392/* 393 * Diffrent types of UFS hold fs_cstotal in different 394 * places, and use diffrent data structure for it. 395 * To make things simplier we just copy fs_cstotal to ufs_sb_private_info 396 */ 397static void ufs_setup_cstotal(struct super_block *sb) 398{ 399 struct ufs_sb_info *sbi = UFS_SB(sb); 400 struct ufs_sb_private_info *uspi = sbi->s_uspi; 401 struct ufs_super_block_first *usb1; 402 struct ufs_super_block_second *usb2; 403 struct ufs_super_block_third *usb3; 404 unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE; 405 406 UFSD("ENTER, mtype=%u\n", mtype); 407 usb1 = ubh_get_usb_first(uspi); 408 usb2 = ubh_get_usb_second(uspi); 409 usb3 = ubh_get_usb_third(uspi); 410 411 if ((mtype == UFS_MOUNT_UFSTYPE_44BSD && 412 (usb1->fs_flags & UFS_FLAGS_UPDATED)) || 413 mtype == UFS_MOUNT_UFSTYPE_UFS2) { 414 /*we have statistic in different place, then usual*/ 415 uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir); 416 uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree); 417 uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree); 418 uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree); 419 } else { 420 uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir); 421 uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree); 422 uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree); 423 uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree); 424 } 425 UFSD("EXIT\n"); 426} 427 428/* 429 * Read on-disk structures associated with cylinder groups 430 */ 431static int ufs_read_cylinder_structures(struct super_block *sb) 432{ 433 struct ufs_sb_info *sbi = UFS_SB(sb); 434 struct ufs_sb_private_info *uspi = sbi->s_uspi; 435 struct ufs_buffer_head * ubh; 436 unsigned char * base, * space; 437 unsigned size, blks, i; 438 struct ufs_super_block_third *usb3; 439 440 UFSD("ENTER\n"); 441 442 usb3 = ubh_get_usb_third(uspi); 443 /* 444 * Read cs structures from (usually) first data block 445 * on the device. 446 */ 447 size = uspi->s_cssize; 448 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift; 449 base = space = kmalloc(size, GFP_KERNEL); 450 if (!base) 451 goto failed; 452 sbi->s_csp = (struct ufs_csum *)space; 453 for (i = 0; i < blks; i += uspi->s_fpb) { 454 size = uspi->s_bsize; 455 if (i + uspi->s_fpb > blks) 456 size = (blks - i) * uspi->s_fsize; 457 458 ubh = ubh_bread(sb, uspi->s_csaddr + i, size); 459 460 if (!ubh) 461 goto failed; 462 463 ubh_ubhcpymem (space, ubh, size); 464 465 space += size; 466 ubh_brelse (ubh); 467 ubh = NULL; 468 } 469 470 /* 471 * Read cylinder group (we read only first fragment from block 472 * at this time) and prepare internal data structures for cg caching. 473 */ 474 if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_KERNEL))) 475 goto failed; 476 for (i = 0; i < uspi->s_ncg; i++) 477 sbi->s_ucg[i] = NULL; 478 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) { 479 sbi->s_ucpi[i] = NULL; 480 sbi->s_cgno[i] = UFS_CGNO_EMPTY; 481 } 482 for (i = 0; i < uspi->s_ncg; i++) { 483 UFSD("read cg %u\n", i); 484 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i)))) 485 goto failed; 486 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data)) 487 goto failed; 488 489 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data); 490 } 491 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) { 492 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_KERNEL))) 493 goto failed; 494 sbi->s_cgno[i] = UFS_CGNO_EMPTY; 495 } 496 sbi->s_cg_loaded = 0; 497 UFSD("EXIT\n"); 498 return 1; 499 500failed: 501 kfree (base); 502 if (sbi->s_ucg) { 503 for (i = 0; i < uspi->s_ncg; i++) 504 if (sbi->s_ucg[i]) 505 brelse (sbi->s_ucg[i]); 506 kfree (sbi->s_ucg); 507 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) 508 kfree (sbi->s_ucpi[i]); 509 } 510 UFSD("EXIT (FAILED)\n"); 511 return 0; 512} 513 514/* 515 * Sync our internal copy of fs_cstotal with disk 516 */ 517static void ufs_put_cstotal(struct super_block *sb) 518{ 519 unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE; 520 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 521 struct ufs_super_block_first *usb1; 522 struct ufs_super_block_second *usb2; 523 struct ufs_super_block_third *usb3; 524 525 UFSD("ENTER\n"); 526 usb1 = ubh_get_usb_first(uspi); 527 usb2 = ubh_get_usb_second(uspi); 528 usb3 = ubh_get_usb_third(uspi); 529 530 if ((mtype == UFS_MOUNT_UFSTYPE_44BSD && 531 (usb1->fs_flags & UFS_FLAGS_UPDATED)) || 532 mtype == UFS_MOUNT_UFSTYPE_UFS2) { 533 /*we have statistic in different place, then usual*/ 534 usb2->fs_un.fs_u2.cs_ndir = 535 cpu_to_fs64(sb, uspi->cs_total.cs_ndir); 536 usb2->fs_un.fs_u2.cs_nbfree = 537 cpu_to_fs64(sb, uspi->cs_total.cs_nbfree); 538 usb3->fs_un1.fs_u2.cs_nifree = 539 cpu_to_fs64(sb, uspi->cs_total.cs_nifree); 540 usb3->fs_un1.fs_u2.cs_nffree = 541 cpu_to_fs64(sb, uspi->cs_total.cs_nffree); 542 } else { 543 usb1->fs_cstotal.cs_ndir = 544 cpu_to_fs32(sb, uspi->cs_total.cs_ndir); 545 usb1->fs_cstotal.cs_nbfree = 546 cpu_to_fs32(sb, uspi->cs_total.cs_nbfree); 547 usb1->fs_cstotal.cs_nifree = 548 cpu_to_fs32(sb, uspi->cs_total.cs_nifree); 549 usb1->fs_cstotal.cs_nffree = 550 cpu_to_fs32(sb, uspi->cs_total.cs_nffree); 551 } 552 ubh_mark_buffer_dirty(USPI_UBH(uspi)); 553 ufs_print_super_stuff(sb, usb1, usb2, usb3); 554 UFSD("EXIT\n"); 555} 556 557/** 558 * ufs_put_super_internal() - put on-disk intrenal structures 559 * @sb: pointer to super_block structure 560 * Put on-disk structures associated with cylinder groups 561 * and write them back to disk, also update cs_total on disk 562 */ 563static void ufs_put_super_internal(struct super_block *sb) 564{ 565 struct ufs_sb_info *sbi = UFS_SB(sb); 566 struct ufs_sb_private_info *uspi = sbi->s_uspi; 567 struct ufs_buffer_head * ubh; 568 unsigned char * base, * space; 569 unsigned blks, size, i; 570 571 572 UFSD("ENTER\n"); 573 ufs_put_cstotal(sb); 574 size = uspi->s_cssize; 575 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift; 576 base = space = (char*) sbi->s_csp; 577 for (i = 0; i < blks; i += uspi->s_fpb) { 578 size = uspi->s_bsize; 579 if (i + uspi->s_fpb > blks) 580 size = (blks - i) * uspi->s_fsize; 581 582 ubh = ubh_bread(sb, uspi->s_csaddr + i, size); 583 584 ubh_memcpyubh (ubh, space, size); 585 space += size; 586 ubh_mark_buffer_uptodate (ubh, 1); 587 ubh_mark_buffer_dirty (ubh); 588 ubh_brelse (ubh); 589 } 590 for (i = 0; i < sbi->s_cg_loaded; i++) { 591 ufs_put_cylinder (sb, i); 592 kfree (sbi->s_ucpi[i]); 593 } 594 for (; i < UFS_MAX_GROUP_LOADED; i++) 595 kfree (sbi->s_ucpi[i]); 596 for (i = 0; i < uspi->s_ncg; i++) 597 brelse (sbi->s_ucg[i]); 598 kfree (sbi->s_ucg); 599 kfree (base); 600 UFSD("EXIT\n"); 601} 602 603static int ufs_fill_super(struct super_block *sb, void *data, int silent) 604{ 605 struct ufs_sb_info * sbi; 606 struct ufs_sb_private_info * uspi; 607 struct ufs_super_block_first * usb1; 608 struct ufs_super_block_second * usb2; 609 struct ufs_super_block_third * usb3; 610 struct ufs_buffer_head * ubh; 611 struct inode *inode; 612 unsigned block_size, super_block_size; 613 unsigned flags; 614 unsigned super_block_offset; 615 616 uspi = NULL; 617 ubh = NULL; 618 flags = 0; 619 620 UFSD("ENTER\n"); 621 622 sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL); 623 if (!sbi) 624 goto failed_nomem; 625 sb->s_fs_info = sbi; 626 627 UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY)); 628 629#ifndef CONFIG_UFS_FS_WRITE 630 if (!(sb->s_flags & MS_RDONLY)) { 631 printk("ufs was compiled with read-only support, " 632 "can't be mounted as read-write\n"); 633 goto failed; 634 } 635#endif 636 /* 637 * Set default mount options 638 * Parse mount options 639 */ 640 sbi->s_mount_opt = 0; 641 ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK); 642 if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) { 643 printk("wrong mount options\n"); 644 goto failed; 645 } 646 if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) { 647 if (!silent) 648 printk("You didn't specify the type of your ufs filesystem\n\n" 649 "mount -t ufs -o ufstype=" 650 "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n" 651 ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, " 652 "default is ufstype=old\n"); 653 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD); 654 } 655 656 sbi->s_uspi = uspi = 657 kmalloc (sizeof(struct ufs_sb_private_info), GFP_KERNEL); 658 if (!uspi) 659 goto failed; 660 uspi->s_dirblksize = UFS_SECTOR_SIZE; 661 super_block_offset=UFS_SBLOCK; 662 663 /* Keep 2Gig file limit. Some UFS variants need to override 664 this but as I don't know which I'll let those in the know loosen 665 the rules */ 666 switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) { 667 case UFS_MOUNT_UFSTYPE_44BSD: 668 UFSD("ufstype=44bsd\n"); 669 uspi->s_fsize = block_size = 512; 670 uspi->s_fmask = ~(512 - 1); 671 uspi->s_fshift = 9; 672 uspi->s_sbsize = super_block_size = 1536; 673 uspi->s_sbbase = 0; 674 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; 675 break; 676 case UFS_MOUNT_UFSTYPE_UFS2: 677 UFSD("ufstype=ufs2\n"); 678 super_block_offset=SBLOCK_UFS2; 679 uspi->s_fsize = block_size = 512; 680 uspi->s_fmask = ~(512 - 1); 681 uspi->s_fshift = 9; 682 uspi->s_sbsize = super_block_size = 1536; 683 uspi->s_sbbase = 0; 684 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; 685 break; 686 687 case UFS_MOUNT_UFSTYPE_SUN: 688 UFSD("ufstype=sun\n"); 689 uspi->s_fsize = block_size = 1024; 690 uspi->s_fmask = ~(1024 - 1); 691 uspi->s_fshift = 10; 692 uspi->s_sbsize = super_block_size = 2048; 693 uspi->s_sbbase = 0; 694 uspi->s_maxsymlinklen = 56; 695 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN; 696 break; 697 698 case UFS_MOUNT_UFSTYPE_SUNx86: 699 UFSD("ufstype=sunx86\n"); 700 uspi->s_fsize = block_size = 1024; 701 uspi->s_fmask = ~(1024 - 1); 702 uspi->s_fshift = 10; 703 uspi->s_sbsize = super_block_size = 2048; 704 uspi->s_sbbase = 0; 705 uspi->s_maxsymlinklen = 56; 706 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN; 707 break; 708 709 case UFS_MOUNT_UFSTYPE_OLD: 710 UFSD("ufstype=old\n"); 711 uspi->s_fsize = block_size = 1024; 712 uspi->s_fmask = ~(1024 - 1); 713 uspi->s_fshift = 10; 714 uspi->s_sbsize = super_block_size = 2048; 715 uspi->s_sbbase = 0; 716 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 717 if (!(sb->s_flags & MS_RDONLY)) { 718 if (!silent) 719 printk(KERN_INFO "ufstype=old is supported read-only\n"); 720 sb->s_flags |= MS_RDONLY; 721 } 722 break; 723 724 case UFS_MOUNT_UFSTYPE_NEXTSTEP: 725 /*TODO: check may be we need set special dir block size?*/ 726 UFSD("ufstype=nextstep\n"); 727 uspi->s_fsize = block_size = 1024; 728 uspi->s_fmask = ~(1024 - 1); 729 uspi->s_fshift = 10; 730 uspi->s_sbsize = super_block_size = 2048; 731 uspi->s_sbbase = 0; 732 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 733 if (!(sb->s_flags & MS_RDONLY)) { 734 if (!silent) 735 printk(KERN_INFO "ufstype=nextstep is supported read-only\n"); 736 sb->s_flags |= MS_RDONLY; 737 } 738 break; 739 740 case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD: 741 /*TODO: check may be we need set special dir block size?*/ 742 UFSD("ufstype=nextstep-cd\n"); 743 uspi->s_fsize = block_size = 2048; 744 uspi->s_fmask = ~(2048 - 1); 745 uspi->s_fshift = 11; 746 uspi->s_sbsize = super_block_size = 2048; 747 uspi->s_sbbase = 0; 748 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 749 if (!(sb->s_flags & MS_RDONLY)) { 750 if (!silent) 751 printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n"); 752 sb->s_flags |= MS_RDONLY; 753 } 754 break; 755 756 case UFS_MOUNT_UFSTYPE_OPENSTEP: 757 UFSD("ufstype=openstep\n"); 758 uspi->s_fsize = block_size = 1024; 759 uspi->s_fmask = ~(1024 - 1); 760 uspi->s_fshift = 10; 761 uspi->s_sbsize = super_block_size = 2048; 762 uspi->s_sbbase = 0; 763 uspi->s_dirblksize = 1024; 764 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; 765 if (!(sb->s_flags & MS_RDONLY)) { 766 if (!silent) 767 printk(KERN_INFO "ufstype=openstep is supported read-only\n"); 768 sb->s_flags |= MS_RDONLY; 769 } 770 break; 771 772 case UFS_MOUNT_UFSTYPE_HP: 773 UFSD("ufstype=hp\n"); 774 uspi->s_fsize = block_size = 1024; 775 uspi->s_fmask = ~(1024 - 1); 776 uspi->s_fshift = 10; 777 uspi->s_sbsize = super_block_size = 2048; 778 uspi->s_sbbase = 0; 779 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 780 if (!(sb->s_flags & MS_RDONLY)) { 781 if (!silent) 782 printk(KERN_INFO "ufstype=hp is supported read-only\n"); 783 sb->s_flags |= MS_RDONLY; 784 } 785 break; 786 default: 787 if (!silent) 788 printk("unknown ufstype\n"); 789 goto failed; 790 } 791 792again: 793 if (!sb_set_blocksize(sb, block_size)) { 794 printk(KERN_ERR "UFS: failed to set blocksize\n"); 795 goto failed; 796 } 797 798 /* 799 * read ufs super block from device 800 */ 801 802 ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size); 803 804 if (!ubh) 805 goto failed; 806 807 808 usb1 = ubh_get_usb_first(uspi); 809 usb2 = ubh_get_usb_second(uspi); 810 usb3 = ubh_get_usb_third(uspi); 811 812 /* 813 * Check ufs magic number 814 */ 815 sbi->s_bytesex = BYTESEX_LE; 816 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) { 817 case UFS_MAGIC: 818 case UFS2_MAGIC: 819 case UFS_MAGIC_LFN: 820 case UFS_MAGIC_FEA: 821 case UFS_MAGIC_4GB: 822 goto magic_found; 823 } 824 sbi->s_bytesex = BYTESEX_BE; 825 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) { 826 case UFS_MAGIC: 827 case UFS2_MAGIC: 828 case UFS_MAGIC_LFN: 829 case UFS_MAGIC_FEA: 830 case UFS_MAGIC_4GB: 831 goto magic_found; 832 } 833 834 if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP) 835 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD) 836 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP)) 837 && uspi->s_sbbase < 256) { 838 ubh_brelse_uspi(uspi); 839 ubh = NULL; 840 uspi->s_sbbase += 8; 841 goto again; 842 } 843 if (!silent) 844 printk("ufs_read_super: bad magic number\n"); 845 goto failed; 846 847magic_found: 848 /* 849 * Check block and fragment sizes 850 */ 851 uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize); 852 uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize); 853 uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize); 854 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask); 855 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift); 856 857 if (uspi->s_fsize & (uspi->s_fsize - 1)) { 858 printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n", 859 uspi->s_fsize); 860 goto failed; 861 } 862 if (uspi->s_fsize < 512) { 863 printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n", 864 uspi->s_fsize); 865 goto failed; 866 } 867 if (uspi->s_fsize > 4096) { 868 printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n", 869 uspi->s_fsize); 870 goto failed; 871 } 872 if (uspi->s_bsize & (uspi->s_bsize - 1)) { 873 printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n", 874 uspi->s_bsize); 875 goto failed; 876 } 877 if (uspi->s_bsize < 4096) { 878 printk(KERN_ERR "ufs_read_super: block size %u is too small\n", 879 uspi->s_bsize); 880 goto failed; 881 } 882 if (uspi->s_bsize / uspi->s_fsize > 8) { 883 printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n", 884 uspi->s_bsize / uspi->s_fsize); 885 goto failed; 886 } 887 if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) { 888 ubh_brelse_uspi(uspi); 889 ubh = NULL; 890 block_size = uspi->s_fsize; 891 super_block_size = uspi->s_sbsize; 892 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size); 893 goto again; 894 } 895 896 897 ufs_print_super_stuff(sb, usb1, usb2, usb3); 898 899 /* 900 * Check, if file system was correctly unmounted. 901 * If not, make it read only. 902 */ 903 if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) || 904 ((flags & UFS_ST_MASK) == UFS_ST_OLD) || 905 (((flags & UFS_ST_MASK) == UFS_ST_SUN || 906 (flags & UFS_ST_MASK) == UFS_ST_SUNx86) && 907 (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) { 908 switch(usb1->fs_clean) { 909 case UFS_FSCLEAN: 910 UFSD("fs is clean\n"); 911 break; 912 case UFS_FSSTABLE: 913 UFSD("fs is stable\n"); 914 break; 915 case UFS_FSOSF1: 916 UFSD("fs is DEC OSF/1\n"); 917 break; 918 case UFS_FSACTIVE: 919 printk("ufs_read_super: fs is active\n"); 920 sb->s_flags |= MS_RDONLY; 921 break; 922 case UFS_FSBAD: 923 printk("ufs_read_super: fs is bad\n"); 924 sb->s_flags |= MS_RDONLY; 925 break; 926 default: 927 printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean); 928 sb->s_flags |= MS_RDONLY; 929 break; 930 } 931 } else { 932 printk("ufs_read_super: fs needs fsck\n"); 933 sb->s_flags |= MS_RDONLY; 934 } 935 936 /* 937 * Read ufs_super_block into internal data structures 938 */ 939 sb->s_op = &ufs_super_ops; 940 sb->dq_op = NULL; /***/ 941 sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic); 942 943 uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno); 944 uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno); 945 uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno); 946 uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno); 947 uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset); 948 uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask); 949 950 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { 951 uspi->s_u2_size = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size); 952 uspi->s_u2_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize); 953 } else { 954 uspi->s_size = fs32_to_cpu(sb, usb1->fs_size); 955 uspi->s_dsize = fs32_to_cpu(sb, usb1->fs_dsize); 956 } 957 958 uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg); 959 /* s_bsize already set */ 960 /* s_fsize already set */ 961 uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag); 962 uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree); 963 uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask); 964 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask); 965 uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift); 966 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift); 967 UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift, 968 uspi->s_fshift); 969 uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift); 970 uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb); 971 /* s_sbsize already set */ 972 uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask); 973 uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift); 974 uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir); 975 uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb); 976 uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf); 977 uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3); 978 uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave); 979 uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew); 980 981 if (uspi->fs_magic == UFS2_MAGIC) 982 uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr); 983 else 984 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr); 985 986 uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize); 987 uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize); 988 uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak); 989 uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect); 990 uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc); 991 uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg); 992 uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg); 993 uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc); 994 uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize); 995 uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3); 996 uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3); 997 uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat); 998 uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos); 999 uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff); 1000 uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff); 1001 1002 /* 1003 * Compute another frequently used values 1004 */ 1005 uspi->s_fpbmask = uspi->s_fpb - 1; 1006 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) 1007 uspi->s_apbshift = uspi->s_bshift - 3; 1008 else 1009 uspi->s_apbshift = uspi->s_bshift - 2; 1010 1011 uspi->s_2apbshift = uspi->s_apbshift * 2; 1012 uspi->s_3apbshift = uspi->s_apbshift * 3; 1013 uspi->s_apb = 1 << uspi->s_apbshift; 1014 uspi->s_2apb = 1 << uspi->s_2apbshift; 1015 uspi->s_3apb = 1 << uspi->s_3apbshift; 1016 uspi->s_apbmask = uspi->s_apb - 1; 1017 uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS; 1018 uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift; 1019 uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift; 1020 uspi->s_bpf = uspi->s_fsize << 3; 1021 uspi->s_bpfshift = uspi->s_fshift + 3; 1022 uspi->s_bpfmask = uspi->s_bpf - 1; 1023 if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == 1024 UFS_MOUNT_UFSTYPE_44BSD) 1025 uspi->s_maxsymlinklen = 1026 fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen); 1027 1028 sbi->s_flags = flags; 1029 1030 inode = iget(sb, UFS_ROOTINO); 1031 if (!inode || is_bad_inode(inode)) 1032 goto failed; 1033 sb->s_root = d_alloc_root(inode); 1034 if (!sb->s_root) 1035 goto dalloc_failed; 1036 1037 ufs_setup_cstotal(sb); 1038 /* 1039 * Read cylinder group structures 1040 */ 1041 if (!(sb->s_flags & MS_RDONLY)) 1042 if (!ufs_read_cylinder_structures(sb)) 1043 goto failed; 1044 1045 UFSD("EXIT\n"); 1046 return 0; 1047 1048dalloc_failed: 1049 iput(inode); 1050failed: 1051 if (ubh) 1052 ubh_brelse_uspi (uspi); 1053 kfree (uspi); 1054 kfree(sbi); 1055 sb->s_fs_info = NULL; 1056 UFSD("EXIT (FAILED)\n"); 1057 return -EINVAL; 1058 1059failed_nomem: 1060 UFSD("EXIT (NOMEM)\n"); 1061 return -ENOMEM; 1062} 1063 1064static void ufs_write_super(struct super_block *sb) 1065{ 1066 struct ufs_sb_private_info * uspi; 1067 struct ufs_super_block_first * usb1; 1068 struct ufs_super_block_third * usb3; 1069 unsigned flags; 1070 1071 lock_kernel(); 1072 UFSD("ENTER\n"); 1073 flags = UFS_SB(sb)->s_flags; 1074 uspi = UFS_SB(sb)->s_uspi; 1075 usb1 = ubh_get_usb_first(uspi); 1076 usb3 = ubh_get_usb_third(uspi); 1077 1078 if (!(sb->s_flags & MS_RDONLY)) { 1079 usb1->fs_time = cpu_to_fs32(sb, get_seconds()); 1080 if ((flags & UFS_ST_MASK) == UFS_ST_SUN 1081 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86) 1082 ufs_set_fs_state(sb, usb1, usb3, 1083 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time)); 1084 ufs_put_cstotal(sb); 1085 } 1086 sb->s_dirt = 0; 1087 UFSD("EXIT\n"); 1088 unlock_kernel(); 1089} 1090 1091static void ufs_put_super(struct super_block *sb) 1092{ 1093 struct ufs_sb_info * sbi = UFS_SB(sb); 1094 1095 UFSD("ENTER\n"); 1096 1097 if (!(sb->s_flags & MS_RDONLY)) 1098 ufs_put_super_internal(sb); 1099 1100 ubh_brelse_uspi (sbi->s_uspi); 1101 kfree (sbi->s_uspi); 1102 kfree (sbi); 1103 sb->s_fs_info = NULL; 1104 UFSD("EXIT\n"); 1105 return; 1106} 1107 1108 1109static int ufs_remount (struct super_block *sb, int *mount_flags, char *data) 1110{ 1111 struct ufs_sb_private_info * uspi; 1112 struct ufs_super_block_first * usb1; 1113 struct ufs_super_block_third * usb3; 1114 unsigned new_mount_opt, ufstype; 1115 unsigned flags; 1116 1117 uspi = UFS_SB(sb)->s_uspi; 1118 flags = UFS_SB(sb)->s_flags; 1119 usb1 = ubh_get_usb_first(uspi); 1120 usb3 = ubh_get_usb_third(uspi); 1121 1122 /* 1123 * Allow the "check" option to be passed as a remount option. 1124 * It is not possible to change ufstype option during remount 1125 */ 1126 ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE; 1127 new_mount_opt = 0; 1128 ufs_set_opt (new_mount_opt, ONERROR_LOCK); 1129 if (!ufs_parse_options (data, &new_mount_opt)) 1130 return -EINVAL; 1131 if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) { 1132 new_mount_opt |= ufstype; 1133 } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) { 1134 printk("ufstype can't be changed during remount\n"); 1135 return -EINVAL; 1136 } 1137 1138 if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) { 1139 UFS_SB(sb)->s_mount_opt = new_mount_opt; 1140 return 0; 1141 } 1142 1143 /* 1144 * fs was mouted as rw, remounting ro 1145 */ 1146 if (*mount_flags & MS_RDONLY) { 1147 ufs_put_super_internal(sb); 1148 usb1->fs_time = cpu_to_fs32(sb, get_seconds()); 1149 if ((flags & UFS_ST_MASK) == UFS_ST_SUN 1150 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86) 1151 ufs_set_fs_state(sb, usb1, usb3, 1152 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time)); 1153 ubh_mark_buffer_dirty (USPI_UBH(uspi)); 1154 sb->s_dirt = 0; 1155 sb->s_flags |= MS_RDONLY; 1156 } else { 1157 /* 1158 * fs was mounted as ro, remounting rw 1159 */ 1160#ifndef CONFIG_UFS_FS_WRITE 1161 printk("ufs was compiled with read-only support, " 1162 "can't be mounted as read-write\n"); 1163 return -EINVAL; 1164#else 1165 if (ufstype != UFS_MOUNT_UFSTYPE_SUN && 1166 ufstype != UFS_MOUNT_UFSTYPE_44BSD && 1167 ufstype != UFS_MOUNT_UFSTYPE_SUNx86 && 1168 ufstype != UFS_MOUNT_UFSTYPE_UFS2) { 1169 printk("this ufstype is read-only supported\n"); 1170 return -EINVAL; 1171 } 1172 if (!ufs_read_cylinder_structures(sb)) { 1173 printk("failed during remounting\n"); 1174 return -EPERM; 1175 } 1176 sb->s_flags &= ~MS_RDONLY; 1177#endif 1178 } 1179 UFS_SB(sb)->s_mount_opt = new_mount_opt; 1180 return 0; 1181} 1182 1183static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf) 1184{ 1185 struct super_block *sb = dentry->d_sb; 1186 struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi; 1187 unsigned flags = UFS_SB(sb)->s_flags; 1188 struct ufs_super_block_first *usb1; 1189 struct ufs_super_block_second *usb2; 1190 struct ufs_super_block_third *usb3; 1191 1192 lock_kernel(); 1193 1194 usb1 = ubh_get_usb_first(uspi); 1195 usb2 = ubh_get_usb_second(uspi); 1196 usb3 = ubh_get_usb_third(uspi); 1197 1198 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { 1199 buf->f_type = UFS2_MAGIC; 1200 buf->f_blocks = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize); 1201 } else { 1202 buf->f_type = UFS_MAGIC; 1203 buf->f_blocks = uspi->s_dsize; 1204 } 1205 buf->f_bfree = ufs_blkstofrags(uspi->cs_total.cs_nbfree) + 1206 uspi->cs_total.cs_nffree; 1207 buf->f_ffree = uspi->cs_total.cs_nifree; 1208 buf->f_bsize = sb->s_blocksize; 1209 buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree)) 1210 ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0; 1211 buf->f_files = uspi->s_ncg * uspi->s_ipg; 1212 buf->f_namelen = UFS_MAXNAMLEN; 1213 1214 unlock_kernel(); 1215 1216 return 0; 1217} 1218 1219static struct kmem_cache * ufs_inode_cachep; 1220 1221static struct inode *ufs_alloc_inode(struct super_block *sb) 1222{ 1223 struct ufs_inode_info *ei; 1224 ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, GFP_KERNEL); 1225 if (!ei) 1226 return NULL; 1227 ei->vfs_inode.i_version = 1; 1228 return &ei->vfs_inode; 1229} 1230 1231static void ufs_destroy_inode(struct inode *inode) 1232{ 1233 kmem_cache_free(ufs_inode_cachep, UFS_I(inode)); 1234} 1235 1236static void init_once(void * foo, struct kmem_cache * cachep, unsigned long flags) 1237{ 1238 struct ufs_inode_info *ei = (struct ufs_inode_info *) foo; 1239 1240 inode_init_once(&ei->vfs_inode); 1241} 1242 1243static int init_inodecache(void) 1244{ 1245 ufs_inode_cachep = kmem_cache_create("ufs_inode_cache", 1246 sizeof(struct ufs_inode_info), 1247 0, (SLAB_RECLAIM_ACCOUNT| 1248 SLAB_MEM_SPREAD), 1249 init_once, NULL); 1250 if (ufs_inode_cachep == NULL) 1251 return -ENOMEM; 1252 return 0; 1253} 1254 1255static void destroy_inodecache(void) 1256{ 1257 kmem_cache_destroy(ufs_inode_cachep); 1258} 1259 1260#ifdef CONFIG_QUOTA 1261static ssize_t ufs_quota_read(struct super_block *, int, char *,size_t, loff_t); 1262static ssize_t ufs_quota_write(struct super_block *, int, const char *, size_t, loff_t); 1263#endif 1264 1265static const struct super_operations ufs_super_ops = { 1266 .alloc_inode = ufs_alloc_inode, 1267 .destroy_inode = ufs_destroy_inode, 1268 .read_inode = ufs_read_inode, 1269 .write_inode = ufs_write_inode, 1270 .delete_inode = ufs_delete_inode, 1271 .put_super = ufs_put_super, 1272 .write_super = ufs_write_super, 1273 .statfs = ufs_statfs, 1274 .remount_fs = ufs_remount, 1275#ifdef CONFIG_QUOTA 1276 .quota_read = ufs_quota_read, 1277 .quota_write = ufs_quota_write, 1278#endif 1279}; 1280 1281#ifdef CONFIG_QUOTA 1282 1283/* Read data from quotafile - avoid pagecache and such because we cannot afford 1284 * acquiring the locks... As quota files are never truncated and quota code 1285 * itself serializes the operations (and noone else should touch the files) 1286 * we don't have to be afraid of races */ 1287static ssize_t ufs_quota_read(struct super_block *sb, int type, char *data, 1288 size_t len, loff_t off) 1289{ 1290 struct inode *inode = sb_dqopt(sb)->files[type]; 1291 sector_t blk = off >> sb->s_blocksize_bits; 1292 int err = 0; 1293 int offset = off & (sb->s_blocksize - 1); 1294 int tocopy; 1295 size_t toread; 1296 struct buffer_head *bh; 1297 loff_t i_size = i_size_read(inode); 1298 1299 if (off > i_size) 1300 return 0; 1301 if (off+len > i_size) 1302 len = i_size-off; 1303 toread = len; 1304 while (toread > 0) { 1305 tocopy = sb->s_blocksize - offset < toread ? 1306 sb->s_blocksize - offset : toread; 1307 1308 bh = ufs_bread(inode, blk, 0, &err); 1309 if (err) 1310 return err; 1311 if (!bh) /* A hole? */ 1312 memset(data, 0, tocopy); 1313 else { 1314 memcpy(data, bh->b_data+offset, tocopy); 1315 brelse(bh); 1316 } 1317 offset = 0; 1318 toread -= tocopy; 1319 data += tocopy; 1320 blk++; 1321 } 1322 return len; 1323} 1324 1325/* Write to quotafile */ 1326static ssize_t ufs_quota_write(struct super_block *sb, int type, 1327 const char *data, size_t len, loff_t off) 1328{ 1329 struct inode *inode = sb_dqopt(sb)->files[type]; 1330 sector_t blk = off >> sb->s_blocksize_bits; 1331 int err = 0; 1332 int offset = off & (sb->s_blocksize - 1); 1333 int tocopy; 1334 size_t towrite = len; 1335 struct buffer_head *bh; 1336 1337 mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); 1338 while (towrite > 0) { 1339 tocopy = sb->s_blocksize - offset < towrite ? 1340 sb->s_blocksize - offset : towrite; 1341 1342 bh = ufs_bread(inode, blk, 1, &err); 1343 if (!bh) 1344 goto out; 1345 lock_buffer(bh); 1346 memcpy(bh->b_data+offset, data, tocopy); 1347 flush_dcache_page(bh->b_page); 1348 set_buffer_uptodate(bh); 1349 mark_buffer_dirty(bh); 1350 unlock_buffer(bh); 1351 brelse(bh); 1352 offset = 0; 1353 towrite -= tocopy; 1354 data += tocopy; 1355 blk++; 1356 } 1357out: 1358 if (len == towrite) { 1359 mutex_unlock(&inode->i_mutex); 1360 return err; 1361 } 1362 if (inode->i_size < off+len-towrite) 1363 i_size_write(inode, off+len-towrite); 1364 inode->i_version++; 1365 inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC; 1366 mark_inode_dirty(inode); 1367 mutex_unlock(&inode->i_mutex); 1368 return len - towrite; 1369} 1370 1371#endif 1372 1373static int ufs_get_sb(struct file_system_type *fs_type, 1374 int flags, const char *dev_name, void *data, struct vfsmount *mnt) 1375{ 1376 return get_sb_bdev(fs_type, flags, dev_name, data, ufs_fill_super, mnt); 1377} 1378 1379static struct file_system_type ufs_fs_type = { 1380 .owner = THIS_MODULE, 1381 .name = "ufs", 1382 .get_sb = ufs_get_sb, 1383 .kill_sb = kill_block_super, 1384 .fs_flags = FS_REQUIRES_DEV, 1385}; 1386 1387static int __init init_ufs_fs(void) 1388{ 1389 int err = init_inodecache(); 1390 if (err) 1391 goto out1; 1392 err = register_filesystem(&ufs_fs_type); 1393 if (err) 1394 goto out; 1395 return 0; 1396out: 1397 destroy_inodecache(); 1398out1: 1399 return err; 1400} 1401 1402static void __exit exit_ufs_fs(void) 1403{ 1404 unregister_filesystem(&ufs_fs_type); 1405 destroy_inodecache(); 1406} 1407 1408module_init(init_ufs_fs) 1409module_exit(exit_ufs_fs) 1410MODULE_LICENSE("GPL"); 1411