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 <gwingerde@gmail.com> 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/exportfs.h> 70#include <linux/module.h> 71#include <linux/bitops.h> 72 73#include <stdarg.h> 74 75#include <asm/uaccess.h> 76#include <asm/system.h> 77 78#include <linux/errno.h> 79#include <linux/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_fs.h" 95#include "ufs.h" 96#include "swab.h" 97#include "util.h" 98 99static struct inode *ufs_nfs_get_inode(struct super_block *sb, u64 ino, u32 generation) 100{ 101 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 102 struct inode *inode; 103 104 if (ino < UFS_ROOTINO || ino > uspi->s_ncg * uspi->s_ipg) 105 return ERR_PTR(-ESTALE); 106 107 inode = ufs_iget(sb, ino); 108 if (IS_ERR(inode)) 109 return ERR_CAST(inode); 110 if (generation && inode->i_generation != generation) { 111 iput(inode); 112 return ERR_PTR(-ESTALE); 113 } 114 return inode; 115} 116 117static struct dentry *ufs_fh_to_dentry(struct super_block *sb, struct fid *fid, 118 int fh_len, int fh_type) 119{ 120 return generic_fh_to_dentry(sb, fid, fh_len, fh_type, ufs_nfs_get_inode); 121} 122 123static struct dentry *ufs_fh_to_parent(struct super_block *sb, struct fid *fid, 124 int fh_len, int fh_type) 125{ 126 return generic_fh_to_parent(sb, fid, fh_len, fh_type, ufs_nfs_get_inode); 127} 128 129static struct dentry *ufs_get_parent(struct dentry *child) 130{ 131 struct qstr dot_dot = { 132 .name = "..", 133 .len = 2, 134 }; 135 ino_t ino; 136 137 ino = ufs_inode_by_name(child->d_inode, &dot_dot); 138 if (!ino) 139 return ERR_PTR(-ENOENT); 140 return d_obtain_alias(ufs_iget(child->d_inode->i_sb, ino)); 141} 142 143static const struct export_operations ufs_export_ops = { 144 .fh_to_dentry = ufs_fh_to_dentry, 145 .fh_to_parent = ufs_fh_to_parent, 146 .get_parent = ufs_get_parent, 147}; 148 149#ifdef CONFIG_UFS_DEBUG 150/* 151 * Print contents of ufs_super_block, useful for debugging 152 */ 153static void ufs_print_super_stuff(struct super_block *sb, 154 struct ufs_super_block_first *usb1, 155 struct ufs_super_block_second *usb2, 156 struct ufs_super_block_third *usb3) 157{ 158 u32 magic = fs32_to_cpu(sb, usb3->fs_magic); 159 160 printk("ufs_print_super_stuff\n"); 161 printk(" magic: 0x%x\n", magic); 162 if (fs32_to_cpu(sb, usb3->fs_magic) == UFS2_MAGIC) { 163 printk(" fs_size: %llu\n", (unsigned long long) 164 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size)); 165 printk(" fs_dsize: %llu\n", (unsigned long long) 166 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize)); 167 printk(" bsize: %u\n", 168 fs32_to_cpu(sb, usb1->fs_bsize)); 169 printk(" fsize: %u\n", 170 fs32_to_cpu(sb, usb1->fs_fsize)); 171 printk(" fs_volname: %s\n", usb2->fs_un.fs_u2.fs_volname); 172 printk(" fs_sblockloc: %llu\n", (unsigned long long) 173 fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc)); 174 printk(" cs_ndir(No of dirs): %llu\n", (unsigned long long) 175 fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir)); 176 printk(" cs_nbfree(No of free blocks): %llu\n", 177 (unsigned long long) 178 fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree)); 179 printk(KERN_INFO" cs_nifree(Num of free inodes): %llu\n", 180 (unsigned long long) 181 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree)); 182 printk(KERN_INFO" cs_nffree(Num of free frags): %llu\n", 183 (unsigned long long) 184 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree)); 185 printk(KERN_INFO" fs_maxsymlinklen: %u\n", 186 fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen)); 187 } else { 188 printk(" sblkno: %u\n", fs32_to_cpu(sb, usb1->fs_sblkno)); 189 printk(" cblkno: %u\n", fs32_to_cpu(sb, usb1->fs_cblkno)); 190 printk(" iblkno: %u\n", fs32_to_cpu(sb, usb1->fs_iblkno)); 191 printk(" dblkno: %u\n", fs32_to_cpu(sb, usb1->fs_dblkno)); 192 printk(" cgoffset: %u\n", 193 fs32_to_cpu(sb, usb1->fs_cgoffset)); 194 printk(" ~cgmask: 0x%x\n", 195 ~fs32_to_cpu(sb, usb1->fs_cgmask)); 196 printk(" size: %u\n", fs32_to_cpu(sb, usb1->fs_size)); 197 printk(" dsize: %u\n", fs32_to_cpu(sb, usb1->fs_dsize)); 198 printk(" ncg: %u\n", fs32_to_cpu(sb, usb1->fs_ncg)); 199 printk(" bsize: %u\n", fs32_to_cpu(sb, usb1->fs_bsize)); 200 printk(" fsize: %u\n", fs32_to_cpu(sb, usb1->fs_fsize)); 201 printk(" frag: %u\n", fs32_to_cpu(sb, usb1->fs_frag)); 202 printk(" fragshift: %u\n", 203 fs32_to_cpu(sb, usb1->fs_fragshift)); 204 printk(" ~fmask: %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask)); 205 printk(" fshift: %u\n", fs32_to_cpu(sb, usb1->fs_fshift)); 206 printk(" sbsize: %u\n", fs32_to_cpu(sb, usb1->fs_sbsize)); 207 printk(" spc: %u\n", fs32_to_cpu(sb, usb1->fs_spc)); 208 printk(" cpg: %u\n", fs32_to_cpu(sb, usb1->fs_cpg)); 209 printk(" ipg: %u\n", fs32_to_cpu(sb, usb1->fs_ipg)); 210 printk(" fpg: %u\n", fs32_to_cpu(sb, usb1->fs_fpg)); 211 printk(" csaddr: %u\n", fs32_to_cpu(sb, usb1->fs_csaddr)); 212 printk(" cssize: %u\n", fs32_to_cpu(sb, usb1->fs_cssize)); 213 printk(" cgsize: %u\n", fs32_to_cpu(sb, usb1->fs_cgsize)); 214 printk(" fstodb: %u\n", 215 fs32_to_cpu(sb, usb1->fs_fsbtodb)); 216 printk(" nrpos: %u\n", fs32_to_cpu(sb, usb3->fs_nrpos)); 217 printk(" ndir %u\n", 218 fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir)); 219 printk(" nifree %u\n", 220 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree)); 221 printk(" nbfree %u\n", 222 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree)); 223 printk(" nffree %u\n", 224 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree)); 225 } 226 printk("\n"); 227} 228 229/* 230 * Print contents of ufs_cylinder_group, useful for debugging 231 */ 232static void ufs_print_cylinder_stuff(struct super_block *sb, 233 struct ufs_cylinder_group *cg) 234{ 235 printk("\nufs_print_cylinder_stuff\n"); 236 printk("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group)); 237 printk(" magic: %x\n", fs32_to_cpu(sb, cg->cg_magic)); 238 printk(" time: %u\n", fs32_to_cpu(sb, cg->cg_time)); 239 printk(" cgx: %u\n", fs32_to_cpu(sb, cg->cg_cgx)); 240 printk(" ncyl: %u\n", fs16_to_cpu(sb, cg->cg_ncyl)); 241 printk(" niblk: %u\n", fs16_to_cpu(sb, cg->cg_niblk)); 242 printk(" ndblk: %u\n", fs32_to_cpu(sb, cg->cg_ndblk)); 243 printk(" cs_ndir: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir)); 244 printk(" cs_nbfree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree)); 245 printk(" cs_nifree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree)); 246 printk(" cs_nffree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree)); 247 printk(" rotor: %u\n", fs32_to_cpu(sb, cg->cg_rotor)); 248 printk(" frotor: %u\n", fs32_to_cpu(sb, cg->cg_frotor)); 249 printk(" irotor: %u\n", fs32_to_cpu(sb, cg->cg_irotor)); 250 printk(" frsum: %u, %u, %u, %u, %u, %u, %u, %u\n", 251 fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]), 252 fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]), 253 fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]), 254 fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7])); 255 printk(" btotoff: %u\n", fs32_to_cpu(sb, cg->cg_btotoff)); 256 printk(" boff: %u\n", fs32_to_cpu(sb, cg->cg_boff)); 257 printk(" iuseoff: %u\n", fs32_to_cpu(sb, cg->cg_iusedoff)); 258 printk(" freeoff: %u\n", fs32_to_cpu(sb, cg->cg_freeoff)); 259 printk(" nextfreeoff: %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff)); 260 printk(" clustersumoff %u\n", 261 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff)); 262 printk(" clusteroff %u\n", 263 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff)); 264 printk(" nclusterblks %u\n", 265 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks)); 266 printk("\n"); 267} 268#else 269# define ufs_print_super_stuff(sb, usb1, usb2, usb3) /**/ 270# define ufs_print_cylinder_stuff(sb, cg) /**/ 271#endif /* CONFIG_UFS_DEBUG */ 272 273static const struct super_operations ufs_super_ops; 274 275static char error_buf[1024]; 276 277void ufs_error (struct super_block * sb, const char * function, 278 const char * fmt, ...) 279{ 280 struct ufs_sb_private_info * uspi; 281 struct ufs_super_block_first * usb1; 282 va_list args; 283 284 uspi = UFS_SB(sb)->s_uspi; 285 usb1 = ubh_get_usb_first(uspi); 286 287 if (!(sb->s_flags & MS_RDONLY)) { 288 usb1->fs_clean = UFS_FSBAD; 289 ubh_mark_buffer_dirty(USPI_UBH(uspi)); 290 sb->s_dirt = 1; 291 sb->s_flags |= MS_RDONLY; 292 } 293 va_start (args, fmt); 294 vsnprintf (error_buf, sizeof(error_buf), fmt, args); 295 va_end (args); 296 switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) { 297 case UFS_MOUNT_ONERROR_PANIC: 298 panic ("UFS-fs panic (device %s): %s: %s\n", 299 sb->s_id, function, error_buf); 300 301 case UFS_MOUNT_ONERROR_LOCK: 302 case UFS_MOUNT_ONERROR_UMOUNT: 303 case UFS_MOUNT_ONERROR_REPAIR: 304 printk (KERN_CRIT "UFS-fs error (device %s): %s: %s\n", 305 sb->s_id, function, error_buf); 306 } 307} 308 309void ufs_panic (struct super_block * sb, const char * function, 310 const char * fmt, ...) 311{ 312 struct ufs_sb_private_info * uspi; 313 struct ufs_super_block_first * usb1; 314 va_list args; 315 316 lock_kernel(); 317 uspi = UFS_SB(sb)->s_uspi; 318 usb1 = ubh_get_usb_first(uspi); 319 320 if (!(sb->s_flags & MS_RDONLY)) { 321 usb1->fs_clean = UFS_FSBAD; 322 ubh_mark_buffer_dirty(USPI_UBH(uspi)); 323 sb->s_dirt = 1; 324 } 325 va_start (args, fmt); 326 vsnprintf (error_buf, sizeof(error_buf), fmt, args); 327 va_end (args); 328 sb->s_flags |= MS_RDONLY; 329 printk (KERN_CRIT "UFS-fs panic (device %s): %s: %s\n", 330 sb->s_id, function, error_buf); 331} 332 333void ufs_warning (struct super_block * sb, const char * function, 334 const char * fmt, ...) 335{ 336 va_list args; 337 338 va_start (args, fmt); 339 vsnprintf (error_buf, sizeof(error_buf), fmt, args); 340 va_end (args); 341 printk (KERN_WARNING "UFS-fs warning (device %s): %s: %s\n", 342 sb->s_id, function, error_buf); 343} 344 345enum { 346 Opt_type_old = UFS_MOUNT_UFSTYPE_OLD, 347 Opt_type_sunx86 = UFS_MOUNT_UFSTYPE_SUNx86, 348 Opt_type_sun = UFS_MOUNT_UFSTYPE_SUN, 349 Opt_type_sunos = UFS_MOUNT_UFSTYPE_SUNOS, 350 Opt_type_44bsd = UFS_MOUNT_UFSTYPE_44BSD, 351 Opt_type_ufs2 = UFS_MOUNT_UFSTYPE_UFS2, 352 Opt_type_hp = UFS_MOUNT_UFSTYPE_HP, 353 Opt_type_nextstepcd = UFS_MOUNT_UFSTYPE_NEXTSTEP_CD, 354 Opt_type_nextstep = UFS_MOUNT_UFSTYPE_NEXTSTEP, 355 Opt_type_openstep = UFS_MOUNT_UFSTYPE_OPENSTEP, 356 Opt_onerror_panic = UFS_MOUNT_ONERROR_PANIC, 357 Opt_onerror_lock = UFS_MOUNT_ONERROR_LOCK, 358 Opt_onerror_umount = UFS_MOUNT_ONERROR_UMOUNT, 359 Opt_onerror_repair = UFS_MOUNT_ONERROR_REPAIR, 360 Opt_err 361}; 362 363static const match_table_t tokens = { 364 {Opt_type_old, "ufstype=old"}, 365 {Opt_type_sunx86, "ufstype=sunx86"}, 366 {Opt_type_sun, "ufstype=sun"}, 367 {Opt_type_sunos, "ufstype=sunos"}, 368 {Opt_type_44bsd, "ufstype=44bsd"}, 369 {Opt_type_ufs2, "ufstype=ufs2"}, 370 {Opt_type_ufs2, "ufstype=5xbsd"}, 371 {Opt_type_hp, "ufstype=hp"}, 372 {Opt_type_nextstepcd, "ufstype=nextstep-cd"}, 373 {Opt_type_nextstep, "ufstype=nextstep"}, 374 {Opt_type_openstep, "ufstype=openstep"}, 375/*end of possible ufs types */ 376 {Opt_onerror_panic, "onerror=panic"}, 377 {Opt_onerror_lock, "onerror=lock"}, 378 {Opt_onerror_umount, "onerror=umount"}, 379 {Opt_onerror_repair, "onerror=repair"}, 380 {Opt_err, NULL} 381}; 382 383static int ufs_parse_options (char * options, unsigned * mount_options) 384{ 385 char * p; 386 387 UFSD("ENTER\n"); 388 389 if (!options) 390 return 1; 391 392 while ((p = strsep(&options, ",")) != NULL) { 393 substring_t args[MAX_OPT_ARGS]; 394 int token; 395 if (!*p) 396 continue; 397 398 token = match_token(p, tokens, args); 399 switch (token) { 400 case Opt_type_old: 401 ufs_clear_opt (*mount_options, UFSTYPE); 402 ufs_set_opt (*mount_options, UFSTYPE_OLD); 403 break; 404 case Opt_type_sunx86: 405 ufs_clear_opt (*mount_options, UFSTYPE); 406 ufs_set_opt (*mount_options, UFSTYPE_SUNx86); 407 break; 408 case Opt_type_sun: 409 ufs_clear_opt (*mount_options, UFSTYPE); 410 ufs_set_opt (*mount_options, UFSTYPE_SUN); 411 break; 412 case Opt_type_sunos: 413 ufs_clear_opt(*mount_options, UFSTYPE); 414 ufs_set_opt(*mount_options, UFSTYPE_SUNOS); 415 break; 416 case Opt_type_44bsd: 417 ufs_clear_opt (*mount_options, UFSTYPE); 418 ufs_set_opt (*mount_options, UFSTYPE_44BSD); 419 break; 420 case Opt_type_ufs2: 421 ufs_clear_opt(*mount_options, UFSTYPE); 422 ufs_set_opt(*mount_options, UFSTYPE_UFS2); 423 break; 424 case Opt_type_hp: 425 ufs_clear_opt (*mount_options, UFSTYPE); 426 ufs_set_opt (*mount_options, UFSTYPE_HP); 427 break; 428 case Opt_type_nextstepcd: 429 ufs_clear_opt (*mount_options, UFSTYPE); 430 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD); 431 break; 432 case Opt_type_nextstep: 433 ufs_clear_opt (*mount_options, UFSTYPE); 434 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP); 435 break; 436 case Opt_type_openstep: 437 ufs_clear_opt (*mount_options, UFSTYPE); 438 ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP); 439 break; 440 case Opt_onerror_panic: 441 ufs_clear_opt (*mount_options, ONERROR); 442 ufs_set_opt (*mount_options, ONERROR_PANIC); 443 break; 444 case Opt_onerror_lock: 445 ufs_clear_opt (*mount_options, ONERROR); 446 ufs_set_opt (*mount_options, ONERROR_LOCK); 447 break; 448 case Opt_onerror_umount: 449 ufs_clear_opt (*mount_options, ONERROR); 450 ufs_set_opt (*mount_options, ONERROR_UMOUNT); 451 break; 452 case Opt_onerror_repair: 453 printk("UFS-fs: Unable to do repair on error, " 454 "will lock lock instead\n"); 455 ufs_clear_opt (*mount_options, ONERROR); 456 ufs_set_opt (*mount_options, ONERROR_REPAIR); 457 break; 458 default: 459 printk("UFS-fs: Invalid option: \"%s\" " 460 "or missing value\n", p); 461 return 0; 462 } 463 } 464 return 1; 465} 466 467/* 468 * Diffrent types of UFS hold fs_cstotal in different 469 * places, and use diffrent data structure for it. 470 * To make things simplier we just copy fs_cstotal to ufs_sb_private_info 471 */ 472static void ufs_setup_cstotal(struct super_block *sb) 473{ 474 struct ufs_sb_info *sbi = UFS_SB(sb); 475 struct ufs_sb_private_info *uspi = sbi->s_uspi; 476 struct ufs_super_block_first *usb1; 477 struct ufs_super_block_second *usb2; 478 struct ufs_super_block_third *usb3; 479 unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE; 480 481 UFSD("ENTER, mtype=%u\n", mtype); 482 usb1 = ubh_get_usb_first(uspi); 483 usb2 = ubh_get_usb_second(uspi); 484 usb3 = ubh_get_usb_third(uspi); 485 486 if ((mtype == UFS_MOUNT_UFSTYPE_44BSD && 487 (usb1->fs_flags & UFS_FLAGS_UPDATED)) || 488 mtype == UFS_MOUNT_UFSTYPE_UFS2) { 489 /*we have statistic in different place, then usual*/ 490 uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir); 491 uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree); 492 uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree); 493 uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree); 494 } else { 495 uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir); 496 uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree); 497 uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree); 498 uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree); 499 } 500 UFSD("EXIT\n"); 501} 502 503/* 504 * Read on-disk structures associated with cylinder groups 505 */ 506static int ufs_read_cylinder_structures(struct super_block *sb) 507{ 508 struct ufs_sb_info *sbi = UFS_SB(sb); 509 struct ufs_sb_private_info *uspi = sbi->s_uspi; 510 struct ufs_buffer_head * ubh; 511 unsigned char * base, * space; 512 unsigned size, blks, i; 513 struct ufs_super_block_third *usb3; 514 515 UFSD("ENTER\n"); 516 517 usb3 = ubh_get_usb_third(uspi); 518 /* 519 * Read cs structures from (usually) first data block 520 * on the device. 521 */ 522 size = uspi->s_cssize; 523 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift; 524 base = space = kmalloc(size, GFP_KERNEL); 525 if (!base) 526 goto failed; 527 sbi->s_csp = (struct ufs_csum *)space; 528 for (i = 0; i < blks; i += uspi->s_fpb) { 529 size = uspi->s_bsize; 530 if (i + uspi->s_fpb > blks) 531 size = (blks - i) * uspi->s_fsize; 532 533 ubh = ubh_bread(sb, uspi->s_csaddr + i, size); 534 535 if (!ubh) 536 goto failed; 537 538 ubh_ubhcpymem (space, ubh, size); 539 540 space += size; 541 ubh_brelse (ubh); 542 ubh = NULL; 543 } 544 545 /* 546 * Read cylinder group (we read only first fragment from block 547 * at this time) and prepare internal data structures for cg caching. 548 */ 549 if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_KERNEL))) 550 goto failed; 551 for (i = 0; i < uspi->s_ncg; i++) 552 sbi->s_ucg[i] = NULL; 553 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) { 554 sbi->s_ucpi[i] = NULL; 555 sbi->s_cgno[i] = UFS_CGNO_EMPTY; 556 } 557 for (i = 0; i < uspi->s_ncg; i++) { 558 UFSD("read cg %u\n", i); 559 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i)))) 560 goto failed; 561 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data)) 562 goto failed; 563 564 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data); 565 } 566 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) { 567 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_KERNEL))) 568 goto failed; 569 sbi->s_cgno[i] = UFS_CGNO_EMPTY; 570 } 571 sbi->s_cg_loaded = 0; 572 UFSD("EXIT\n"); 573 return 1; 574 575failed: 576 kfree (base); 577 if (sbi->s_ucg) { 578 for (i = 0; i < uspi->s_ncg; i++) 579 if (sbi->s_ucg[i]) 580 brelse (sbi->s_ucg[i]); 581 kfree (sbi->s_ucg); 582 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) 583 kfree (sbi->s_ucpi[i]); 584 } 585 UFSD("EXIT (FAILED)\n"); 586 return 0; 587} 588 589/* 590 * Sync our internal copy of fs_cstotal with disk 591 */ 592static void ufs_put_cstotal(struct super_block *sb) 593{ 594 unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE; 595 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 596 struct ufs_super_block_first *usb1; 597 struct ufs_super_block_second *usb2; 598 struct ufs_super_block_third *usb3; 599 600 UFSD("ENTER\n"); 601 usb1 = ubh_get_usb_first(uspi); 602 usb2 = ubh_get_usb_second(uspi); 603 usb3 = ubh_get_usb_third(uspi); 604 605 if ((mtype == UFS_MOUNT_UFSTYPE_44BSD && 606 (usb1->fs_flags & UFS_FLAGS_UPDATED)) || 607 mtype == UFS_MOUNT_UFSTYPE_UFS2) { 608 /*we have statistic in different place, then usual*/ 609 usb2->fs_un.fs_u2.cs_ndir = 610 cpu_to_fs64(sb, uspi->cs_total.cs_ndir); 611 usb2->fs_un.fs_u2.cs_nbfree = 612 cpu_to_fs64(sb, uspi->cs_total.cs_nbfree); 613 usb3->fs_un1.fs_u2.cs_nifree = 614 cpu_to_fs64(sb, uspi->cs_total.cs_nifree); 615 usb3->fs_un1.fs_u2.cs_nffree = 616 cpu_to_fs64(sb, uspi->cs_total.cs_nffree); 617 } else { 618 usb1->fs_cstotal.cs_ndir = 619 cpu_to_fs32(sb, uspi->cs_total.cs_ndir); 620 usb1->fs_cstotal.cs_nbfree = 621 cpu_to_fs32(sb, uspi->cs_total.cs_nbfree); 622 usb1->fs_cstotal.cs_nifree = 623 cpu_to_fs32(sb, uspi->cs_total.cs_nifree); 624 usb1->fs_cstotal.cs_nffree = 625 cpu_to_fs32(sb, uspi->cs_total.cs_nffree); 626 } 627 ubh_mark_buffer_dirty(USPI_UBH(uspi)); 628 ufs_print_super_stuff(sb, usb1, usb2, usb3); 629 UFSD("EXIT\n"); 630} 631 632/** 633 * ufs_put_super_internal() - put on-disk intrenal structures 634 * @sb: pointer to super_block structure 635 * Put on-disk structures associated with cylinder groups 636 * and write them back to disk, also update cs_total on disk 637 */ 638static void ufs_put_super_internal(struct super_block *sb) 639{ 640 struct ufs_sb_info *sbi = UFS_SB(sb); 641 struct ufs_sb_private_info *uspi = sbi->s_uspi; 642 struct ufs_buffer_head * ubh; 643 unsigned char * base, * space; 644 unsigned blks, size, i; 645 646 647 UFSD("ENTER\n"); 648 649 lock_kernel(); 650 651 ufs_put_cstotal(sb); 652 size = uspi->s_cssize; 653 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift; 654 base = space = (char*) sbi->s_csp; 655 for (i = 0; i < blks; i += uspi->s_fpb) { 656 size = uspi->s_bsize; 657 if (i + uspi->s_fpb > blks) 658 size = (blks - i) * uspi->s_fsize; 659 660 ubh = ubh_bread(sb, uspi->s_csaddr + i, size); 661 662 ubh_memcpyubh (ubh, space, size); 663 space += size; 664 ubh_mark_buffer_uptodate (ubh, 1); 665 ubh_mark_buffer_dirty (ubh); 666 ubh_brelse (ubh); 667 } 668 for (i = 0; i < sbi->s_cg_loaded; i++) { 669 ufs_put_cylinder (sb, i); 670 kfree (sbi->s_ucpi[i]); 671 } 672 for (; i < UFS_MAX_GROUP_LOADED; i++) 673 kfree (sbi->s_ucpi[i]); 674 for (i = 0; i < uspi->s_ncg; i++) 675 brelse (sbi->s_ucg[i]); 676 kfree (sbi->s_ucg); 677 kfree (base); 678 679 unlock_kernel(); 680 681 UFSD("EXIT\n"); 682} 683 684static int ufs_fill_super(struct super_block *sb, void *data, int silent) 685{ 686 struct ufs_sb_info * sbi; 687 struct ufs_sb_private_info * uspi; 688 struct ufs_super_block_first * usb1; 689 struct ufs_super_block_second * usb2; 690 struct ufs_super_block_third * usb3; 691 struct ufs_buffer_head * ubh; 692 struct inode *inode; 693 unsigned block_size, super_block_size; 694 unsigned flags; 695 unsigned super_block_offset; 696 unsigned maxsymlen; 697 int ret = -EINVAL; 698 699 uspi = NULL; 700 ubh = NULL; 701 flags = 0; 702 703 UFSD("ENTER\n"); 704 705 sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL); 706 if (!sbi) 707 goto failed_nomem; 708 sb->s_fs_info = sbi; 709 710 UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY)); 711 712#ifndef CONFIG_UFS_FS_WRITE 713 if (!(sb->s_flags & MS_RDONLY)) { 714 printk("ufs was compiled with read-only support, " 715 "can't be mounted as read-write\n"); 716 goto failed; 717 } 718#endif 719 /* 720 * Set default mount options 721 * Parse mount options 722 */ 723 sbi->s_mount_opt = 0; 724 ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK); 725 if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) { 726 printk("wrong mount options\n"); 727 goto failed; 728 } 729 if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) { 730 if (!silent) 731 printk("You didn't specify the type of your ufs filesystem\n\n" 732 "mount -t ufs -o ufstype=" 733 "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n" 734 ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, " 735 "default is ufstype=old\n"); 736 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD); 737 } 738 739 uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL); 740 sbi->s_uspi = uspi; 741 if (!uspi) 742 goto failed; 743 uspi->s_dirblksize = UFS_SECTOR_SIZE; 744 super_block_offset=UFS_SBLOCK; 745 746 /* Keep 2Gig file limit. Some UFS variants need to override 747 this but as I don't know which I'll let those in the know loosen 748 the rules */ 749 switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) { 750 case UFS_MOUNT_UFSTYPE_44BSD: 751 UFSD("ufstype=44bsd\n"); 752 uspi->s_fsize = block_size = 512; 753 uspi->s_fmask = ~(512 - 1); 754 uspi->s_fshift = 9; 755 uspi->s_sbsize = super_block_size = 1536; 756 uspi->s_sbbase = 0; 757 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; 758 break; 759 case UFS_MOUNT_UFSTYPE_UFS2: 760 UFSD("ufstype=ufs2\n"); 761 super_block_offset=SBLOCK_UFS2; 762 uspi->s_fsize = block_size = 512; 763 uspi->s_fmask = ~(512 - 1); 764 uspi->s_fshift = 9; 765 uspi->s_sbsize = super_block_size = 1536; 766 uspi->s_sbbase = 0; 767 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; 768 break; 769 770 case UFS_MOUNT_UFSTYPE_SUN: 771 UFSD("ufstype=sun\n"); 772 uspi->s_fsize = block_size = 1024; 773 uspi->s_fmask = ~(1024 - 1); 774 uspi->s_fshift = 10; 775 uspi->s_sbsize = super_block_size = 2048; 776 uspi->s_sbbase = 0; 777 uspi->s_maxsymlinklen = 0; /* Not supported on disk */ 778 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN; 779 break; 780 781 case UFS_MOUNT_UFSTYPE_SUNOS: 782 UFSD(("ufstype=sunos\n")) 783 uspi->s_fsize = block_size = 1024; 784 uspi->s_fmask = ~(1024 - 1); 785 uspi->s_fshift = 10; 786 uspi->s_sbsize = 2048; 787 super_block_size = 2048; 788 uspi->s_sbbase = 0; 789 uspi->s_maxsymlinklen = 0; /* Not supported on disk */ 790 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_SUNOS | UFS_CG_SUN; 791 break; 792 793 case UFS_MOUNT_UFSTYPE_SUNx86: 794 UFSD("ufstype=sunx86\n"); 795 uspi->s_fsize = block_size = 1024; 796 uspi->s_fmask = ~(1024 - 1); 797 uspi->s_fshift = 10; 798 uspi->s_sbsize = super_block_size = 2048; 799 uspi->s_sbbase = 0; 800 uspi->s_maxsymlinklen = 0; /* Not supported on disk */ 801 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN; 802 break; 803 804 case UFS_MOUNT_UFSTYPE_OLD: 805 UFSD("ufstype=old\n"); 806 uspi->s_fsize = block_size = 1024; 807 uspi->s_fmask = ~(1024 - 1); 808 uspi->s_fshift = 10; 809 uspi->s_sbsize = super_block_size = 2048; 810 uspi->s_sbbase = 0; 811 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 812 if (!(sb->s_flags & MS_RDONLY)) { 813 if (!silent) 814 printk(KERN_INFO "ufstype=old is supported read-only\n"); 815 sb->s_flags |= MS_RDONLY; 816 } 817 break; 818 819 case UFS_MOUNT_UFSTYPE_NEXTSTEP: 820 UFSD("ufstype=nextstep\n"); 821 uspi->s_fsize = block_size = 1024; 822 uspi->s_fmask = ~(1024 - 1); 823 uspi->s_fshift = 10; 824 uspi->s_sbsize = super_block_size = 2048; 825 uspi->s_sbbase = 0; 826 uspi->s_dirblksize = 1024; 827 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 828 if (!(sb->s_flags & MS_RDONLY)) { 829 if (!silent) 830 printk(KERN_INFO "ufstype=nextstep is supported read-only\n"); 831 sb->s_flags |= MS_RDONLY; 832 } 833 break; 834 835 case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD: 836 UFSD("ufstype=nextstep-cd\n"); 837 uspi->s_fsize = block_size = 2048; 838 uspi->s_fmask = ~(2048 - 1); 839 uspi->s_fshift = 11; 840 uspi->s_sbsize = super_block_size = 2048; 841 uspi->s_sbbase = 0; 842 uspi->s_dirblksize = 1024; 843 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 844 if (!(sb->s_flags & MS_RDONLY)) { 845 if (!silent) 846 printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n"); 847 sb->s_flags |= MS_RDONLY; 848 } 849 break; 850 851 case UFS_MOUNT_UFSTYPE_OPENSTEP: 852 UFSD("ufstype=openstep\n"); 853 uspi->s_fsize = block_size = 1024; 854 uspi->s_fmask = ~(1024 - 1); 855 uspi->s_fshift = 10; 856 uspi->s_sbsize = super_block_size = 2048; 857 uspi->s_sbbase = 0; 858 uspi->s_dirblksize = 1024; 859 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; 860 if (!(sb->s_flags & MS_RDONLY)) { 861 if (!silent) 862 printk(KERN_INFO "ufstype=openstep is supported read-only\n"); 863 sb->s_flags |= MS_RDONLY; 864 } 865 break; 866 867 case UFS_MOUNT_UFSTYPE_HP: 868 UFSD("ufstype=hp\n"); 869 uspi->s_fsize = block_size = 1024; 870 uspi->s_fmask = ~(1024 - 1); 871 uspi->s_fshift = 10; 872 uspi->s_sbsize = super_block_size = 2048; 873 uspi->s_sbbase = 0; 874 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 875 if (!(sb->s_flags & MS_RDONLY)) { 876 if (!silent) 877 printk(KERN_INFO "ufstype=hp is supported read-only\n"); 878 sb->s_flags |= MS_RDONLY; 879 } 880 break; 881 default: 882 if (!silent) 883 printk("unknown ufstype\n"); 884 goto failed; 885 } 886 887again: 888 if (!sb_set_blocksize(sb, block_size)) { 889 printk(KERN_ERR "UFS: failed to set blocksize\n"); 890 goto failed; 891 } 892 893 /* 894 * read ufs super block from device 895 */ 896 897 ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size); 898 899 if (!ubh) 900 goto failed; 901 902 usb1 = ubh_get_usb_first(uspi); 903 usb2 = ubh_get_usb_second(uspi); 904 usb3 = ubh_get_usb_third(uspi); 905 906 /* Sort out mod used on SunOS 4.1.3 for fs_state */ 907 uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat); 908 if (((flags & UFS_ST_MASK) == UFS_ST_SUNOS) && 909 (uspi->s_postblformat != UFS_42POSTBLFMT)) { 910 flags &= ~UFS_ST_MASK; 911 flags |= UFS_ST_SUN; 912 } 913 914 /* 915 * Check ufs magic number 916 */ 917 sbi->s_bytesex = BYTESEX_LE; 918 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) { 919 case UFS_MAGIC: 920 case UFS_MAGIC_BW: 921 case UFS2_MAGIC: 922 case UFS_MAGIC_LFN: 923 case UFS_MAGIC_FEA: 924 case UFS_MAGIC_4GB: 925 goto magic_found; 926 } 927 sbi->s_bytesex = BYTESEX_BE; 928 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) { 929 case UFS_MAGIC: 930 case UFS_MAGIC_BW: 931 case UFS2_MAGIC: 932 case UFS_MAGIC_LFN: 933 case UFS_MAGIC_FEA: 934 case UFS_MAGIC_4GB: 935 goto magic_found; 936 } 937 938 if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP) 939 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD) 940 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP)) 941 && uspi->s_sbbase < 256) { 942 ubh_brelse_uspi(uspi); 943 ubh = NULL; 944 uspi->s_sbbase += 8; 945 goto again; 946 } 947 if (!silent) 948 printk("ufs_read_super: bad magic number\n"); 949 goto failed; 950 951magic_found: 952 /* 953 * Check block and fragment sizes 954 */ 955 uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize); 956 uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize); 957 uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize); 958 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask); 959 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift); 960 961 if (!is_power_of_2(uspi->s_fsize)) { 962 printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n", 963 uspi->s_fsize); 964 goto failed; 965 } 966 if (uspi->s_fsize < 512) { 967 printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n", 968 uspi->s_fsize); 969 goto failed; 970 } 971 if (uspi->s_fsize > 4096) { 972 printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n", 973 uspi->s_fsize); 974 goto failed; 975 } 976 if (!is_power_of_2(uspi->s_bsize)) { 977 printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n", 978 uspi->s_bsize); 979 goto failed; 980 } 981 if (uspi->s_bsize < 4096) { 982 printk(KERN_ERR "ufs_read_super: block size %u is too small\n", 983 uspi->s_bsize); 984 goto failed; 985 } 986 if (uspi->s_bsize / uspi->s_fsize > 8) { 987 printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n", 988 uspi->s_bsize / uspi->s_fsize); 989 goto failed; 990 } 991 if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) { 992 ubh_brelse_uspi(uspi); 993 ubh = NULL; 994 block_size = uspi->s_fsize; 995 super_block_size = uspi->s_sbsize; 996 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size); 997 goto again; 998 } 999 1000 sbi->s_flags = flags;/*after that line some functions use s_flags*/ 1001 ufs_print_super_stuff(sb, usb1, usb2, usb3); 1002 1003 /* 1004 * Check, if file system was correctly unmounted. 1005 * If not, make it read only. 1006 */ 1007 if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) || 1008 ((flags & UFS_ST_MASK) == UFS_ST_OLD) || 1009 (((flags & UFS_ST_MASK) == UFS_ST_SUN || 1010 (flags & UFS_ST_MASK) == UFS_ST_SUNOS || 1011 (flags & UFS_ST_MASK) == UFS_ST_SUNx86) && 1012 (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) { 1013 switch(usb1->fs_clean) { 1014 case UFS_FSCLEAN: 1015 UFSD("fs is clean\n"); 1016 break; 1017 case UFS_FSSTABLE: 1018 UFSD("fs is stable\n"); 1019 break; 1020 case UFS_FSLOG: 1021 UFSD("fs is logging fs\n"); 1022 break; 1023 case UFS_FSOSF1: 1024 UFSD("fs is DEC OSF/1\n"); 1025 break; 1026 case UFS_FSACTIVE: 1027 printk("ufs_read_super: fs is active\n"); 1028 sb->s_flags |= MS_RDONLY; 1029 break; 1030 case UFS_FSBAD: 1031 printk("ufs_read_super: fs is bad\n"); 1032 sb->s_flags |= MS_RDONLY; 1033 break; 1034 default: 1035 printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean); 1036 sb->s_flags |= MS_RDONLY; 1037 break; 1038 } 1039 } else { 1040 printk("ufs_read_super: fs needs fsck\n"); 1041 sb->s_flags |= MS_RDONLY; 1042 } 1043 1044 /* 1045 * Read ufs_super_block into internal data structures 1046 */ 1047 sb->s_op = &ufs_super_ops; 1048 sb->s_export_op = &ufs_export_ops; 1049 1050 sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic); 1051 1052 uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno); 1053 uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno); 1054 uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno); 1055 uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno); 1056 uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset); 1057 uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask); 1058 1059 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { 1060 uspi->s_u2_size = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size); 1061 uspi->s_u2_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize); 1062 } else { 1063 uspi->s_size = fs32_to_cpu(sb, usb1->fs_size); 1064 uspi->s_dsize = fs32_to_cpu(sb, usb1->fs_dsize); 1065 } 1066 1067 uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg); 1068 /* s_bsize already set */ 1069 /* s_fsize already set */ 1070 uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag); 1071 uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree); 1072 uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask); 1073 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask); 1074 uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift); 1075 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift); 1076 UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift, 1077 uspi->s_fshift); 1078 uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift); 1079 uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb); 1080 /* s_sbsize already set */ 1081 uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask); 1082 uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift); 1083 uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir); 1084 uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb); 1085 uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf); 1086 uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3); 1087 uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave); 1088 uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew); 1089 1090 if (uspi->fs_magic == UFS2_MAGIC) 1091 uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr); 1092 else 1093 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr); 1094 1095 uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize); 1096 uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize); 1097 uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak); 1098 uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect); 1099 uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc); 1100 uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg); 1101 uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg); 1102 uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc); 1103 uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize); 1104 uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3); 1105 uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3); 1106 uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos); 1107 uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff); 1108 uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff); 1109 1110 /* 1111 * Compute another frequently used values 1112 */ 1113 uspi->s_fpbmask = uspi->s_fpb - 1; 1114 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) 1115 uspi->s_apbshift = uspi->s_bshift - 3; 1116 else 1117 uspi->s_apbshift = uspi->s_bshift - 2; 1118 1119 uspi->s_2apbshift = uspi->s_apbshift * 2; 1120 uspi->s_3apbshift = uspi->s_apbshift * 3; 1121 uspi->s_apb = 1 << uspi->s_apbshift; 1122 uspi->s_2apb = 1 << uspi->s_2apbshift; 1123 uspi->s_3apb = 1 << uspi->s_3apbshift; 1124 uspi->s_apbmask = uspi->s_apb - 1; 1125 uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS; 1126 uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift; 1127 uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift; 1128 uspi->s_bpf = uspi->s_fsize << 3; 1129 uspi->s_bpfshift = uspi->s_fshift + 3; 1130 uspi->s_bpfmask = uspi->s_bpf - 1; 1131 if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_44BSD || 1132 (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_UFS2) 1133 uspi->s_maxsymlinklen = 1134 fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen); 1135 1136 if (uspi->fs_magic == UFS2_MAGIC) 1137 maxsymlen = 2 * 4 * (UFS_NDADDR + UFS_NINDIR); 1138 else 1139 maxsymlen = 4 * (UFS_NDADDR + UFS_NINDIR); 1140 if (uspi->s_maxsymlinklen > maxsymlen) { 1141 ufs_warning(sb, __func__, "ufs_read_super: excessive maximum " 1142 "fast symlink size (%u)\n", uspi->s_maxsymlinklen); 1143 uspi->s_maxsymlinklen = maxsymlen; 1144 } 1145 1146 inode = ufs_iget(sb, UFS_ROOTINO); 1147 if (IS_ERR(inode)) { 1148 ret = PTR_ERR(inode); 1149 goto failed; 1150 } 1151 sb->s_root = d_alloc_root(inode); 1152 if (!sb->s_root) { 1153 ret = -ENOMEM; 1154 goto dalloc_failed; 1155 } 1156 1157 ufs_setup_cstotal(sb); 1158 /* 1159 * Read cylinder group structures 1160 */ 1161 if (!(sb->s_flags & MS_RDONLY)) 1162 if (!ufs_read_cylinder_structures(sb)) 1163 goto failed; 1164 1165 UFSD("EXIT\n"); 1166 return 0; 1167 1168dalloc_failed: 1169 iput(inode); 1170failed: 1171 if (ubh) 1172 ubh_brelse_uspi (uspi); 1173 kfree (uspi); 1174 kfree(sbi); 1175 sb->s_fs_info = NULL; 1176 UFSD("EXIT (FAILED)\n"); 1177 return ret; 1178 1179failed_nomem: 1180 UFSD("EXIT (NOMEM)\n"); 1181 return -ENOMEM; 1182} 1183 1184static int ufs_sync_fs(struct super_block *sb, int wait) 1185{ 1186 struct ufs_sb_private_info * uspi; 1187 struct ufs_super_block_first * usb1; 1188 struct ufs_super_block_third * usb3; 1189 unsigned flags; 1190 1191 lock_super(sb); 1192 lock_kernel(); 1193 1194 UFSD("ENTER\n"); 1195 1196 flags = UFS_SB(sb)->s_flags; 1197 uspi = UFS_SB(sb)->s_uspi; 1198 usb1 = ubh_get_usb_first(uspi); 1199 usb3 = ubh_get_usb_third(uspi); 1200 1201 usb1->fs_time = cpu_to_fs32(sb, get_seconds()); 1202 if ((flags & UFS_ST_MASK) == UFS_ST_SUN || 1203 (flags & UFS_ST_MASK) == UFS_ST_SUNOS || 1204 (flags & UFS_ST_MASK) == UFS_ST_SUNx86) 1205 ufs_set_fs_state(sb, usb1, usb3, 1206 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time)); 1207 ufs_put_cstotal(sb); 1208 sb->s_dirt = 0; 1209 1210 UFSD("EXIT\n"); 1211 unlock_kernel(); 1212 unlock_super(sb); 1213 1214 return 0; 1215} 1216 1217static void ufs_write_super(struct super_block *sb) 1218{ 1219 if (!(sb->s_flags & MS_RDONLY)) 1220 ufs_sync_fs(sb, 1); 1221 else 1222 sb->s_dirt = 0; 1223} 1224 1225static void ufs_put_super(struct super_block *sb) 1226{ 1227 struct ufs_sb_info * sbi = UFS_SB(sb); 1228 1229 UFSD("ENTER\n"); 1230 1231 if (sb->s_dirt) 1232 ufs_write_super(sb); 1233 1234 if (!(sb->s_flags & MS_RDONLY)) 1235 ufs_put_super_internal(sb); 1236 1237 ubh_brelse_uspi (sbi->s_uspi); 1238 kfree (sbi->s_uspi); 1239 kfree (sbi); 1240 sb->s_fs_info = NULL; 1241 UFSD("EXIT\n"); 1242 return; 1243} 1244 1245 1246static int ufs_remount (struct super_block *sb, int *mount_flags, char *data) 1247{ 1248 struct ufs_sb_private_info * uspi; 1249 struct ufs_super_block_first * usb1; 1250 struct ufs_super_block_third * usb3; 1251 unsigned new_mount_opt, ufstype; 1252 unsigned flags; 1253 1254 lock_kernel(); 1255 lock_super(sb); 1256 uspi = UFS_SB(sb)->s_uspi; 1257 flags = UFS_SB(sb)->s_flags; 1258 usb1 = ubh_get_usb_first(uspi); 1259 usb3 = ubh_get_usb_third(uspi); 1260 1261 /* 1262 * Allow the "check" option to be passed as a remount option. 1263 * It is not possible to change ufstype option during remount 1264 */ 1265 ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE; 1266 new_mount_opt = 0; 1267 ufs_set_opt (new_mount_opt, ONERROR_LOCK); 1268 if (!ufs_parse_options (data, &new_mount_opt)) { 1269 unlock_super(sb); 1270 unlock_kernel(); 1271 return -EINVAL; 1272 } 1273 if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) { 1274 new_mount_opt |= ufstype; 1275 } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) { 1276 printk("ufstype can't be changed during remount\n"); 1277 unlock_super(sb); 1278 unlock_kernel(); 1279 return -EINVAL; 1280 } 1281 1282 if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) { 1283 UFS_SB(sb)->s_mount_opt = new_mount_opt; 1284 unlock_super(sb); 1285 unlock_kernel(); 1286 return 0; 1287 } 1288 1289 /* 1290 * fs was mouted as rw, remounting ro 1291 */ 1292 if (*mount_flags & MS_RDONLY) { 1293 ufs_put_super_internal(sb); 1294 usb1->fs_time = cpu_to_fs32(sb, get_seconds()); 1295 if ((flags & UFS_ST_MASK) == UFS_ST_SUN 1296 || (flags & UFS_ST_MASK) == UFS_ST_SUNOS 1297 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86) 1298 ufs_set_fs_state(sb, usb1, usb3, 1299 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time)); 1300 ubh_mark_buffer_dirty (USPI_UBH(uspi)); 1301 sb->s_dirt = 0; 1302 sb->s_flags |= MS_RDONLY; 1303 } else { 1304 /* 1305 * fs was mounted as ro, remounting rw 1306 */ 1307#ifndef CONFIG_UFS_FS_WRITE 1308 printk("ufs was compiled with read-only support, " 1309 "can't be mounted as read-write\n"); 1310 unlock_super(sb); 1311 unlock_kernel(); 1312 return -EINVAL; 1313#else 1314 if (ufstype != UFS_MOUNT_UFSTYPE_SUN && 1315 ufstype != UFS_MOUNT_UFSTYPE_SUNOS && 1316 ufstype != UFS_MOUNT_UFSTYPE_44BSD && 1317 ufstype != UFS_MOUNT_UFSTYPE_SUNx86 && 1318 ufstype != UFS_MOUNT_UFSTYPE_UFS2) { 1319 printk("this ufstype is read-only supported\n"); 1320 unlock_super(sb); 1321 unlock_kernel(); 1322 return -EINVAL; 1323 } 1324 if (!ufs_read_cylinder_structures(sb)) { 1325 printk("failed during remounting\n"); 1326 unlock_super(sb); 1327 unlock_kernel(); 1328 return -EPERM; 1329 } 1330 sb->s_flags &= ~MS_RDONLY; 1331#endif 1332 } 1333 UFS_SB(sb)->s_mount_opt = new_mount_opt; 1334 unlock_super(sb); 1335 unlock_kernel(); 1336 return 0; 1337} 1338 1339static int ufs_show_options(struct seq_file *seq, struct vfsmount *vfs) 1340{ 1341 struct ufs_sb_info *sbi = UFS_SB(vfs->mnt_sb); 1342 unsigned mval = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE; 1343 const struct match_token *tp = tokens; 1344 1345 while (tp->token != Opt_onerror_panic && tp->token != mval) 1346 ++tp; 1347 BUG_ON(tp->token == Opt_onerror_panic); 1348 seq_printf(seq, ",%s", tp->pattern); 1349 1350 mval = sbi->s_mount_opt & UFS_MOUNT_ONERROR; 1351 while (tp->token != Opt_err && tp->token != mval) 1352 ++tp; 1353 BUG_ON(tp->token == Opt_err); 1354 seq_printf(seq, ",%s", tp->pattern); 1355 1356 return 0; 1357} 1358 1359static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf) 1360{ 1361 struct super_block *sb = dentry->d_sb; 1362 struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi; 1363 unsigned flags = UFS_SB(sb)->s_flags; 1364 struct ufs_super_block_first *usb1; 1365 struct ufs_super_block_second *usb2; 1366 struct ufs_super_block_third *usb3; 1367 u64 id = huge_encode_dev(sb->s_bdev->bd_dev); 1368 1369 lock_kernel(); 1370 1371 usb1 = ubh_get_usb_first(uspi); 1372 usb2 = ubh_get_usb_second(uspi); 1373 usb3 = ubh_get_usb_third(uspi); 1374 1375 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { 1376 buf->f_type = UFS2_MAGIC; 1377 buf->f_blocks = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize); 1378 } else { 1379 buf->f_type = UFS_MAGIC; 1380 buf->f_blocks = uspi->s_dsize; 1381 } 1382 buf->f_bfree = ufs_blkstofrags(uspi->cs_total.cs_nbfree) + 1383 uspi->cs_total.cs_nffree; 1384 buf->f_ffree = uspi->cs_total.cs_nifree; 1385 buf->f_bsize = sb->s_blocksize; 1386 buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree)) 1387 ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0; 1388 buf->f_files = uspi->s_ncg * uspi->s_ipg; 1389 buf->f_namelen = UFS_MAXNAMLEN; 1390 buf->f_fsid.val[0] = (u32)id; 1391 buf->f_fsid.val[1] = (u32)(id >> 32); 1392 1393 unlock_kernel(); 1394 1395 return 0; 1396} 1397 1398static struct kmem_cache * ufs_inode_cachep; 1399 1400static struct inode *ufs_alloc_inode(struct super_block *sb) 1401{ 1402 struct ufs_inode_info *ei; 1403 ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, GFP_KERNEL); 1404 if (!ei) 1405 return NULL; 1406 ei->vfs_inode.i_version = 1; 1407 return &ei->vfs_inode; 1408} 1409 1410static void ufs_destroy_inode(struct inode *inode) 1411{ 1412 kmem_cache_free(ufs_inode_cachep, UFS_I(inode)); 1413} 1414 1415static void init_once(void *foo) 1416{ 1417 struct ufs_inode_info *ei = (struct ufs_inode_info *) foo; 1418 1419 inode_init_once(&ei->vfs_inode); 1420} 1421 1422static int init_inodecache(void) 1423{ 1424 ufs_inode_cachep = kmem_cache_create("ufs_inode_cache", 1425 sizeof(struct ufs_inode_info), 1426 0, (SLAB_RECLAIM_ACCOUNT| 1427 SLAB_MEM_SPREAD), 1428 init_once); 1429 if (ufs_inode_cachep == NULL) 1430 return -ENOMEM; 1431 return 0; 1432} 1433 1434static void destroy_inodecache(void) 1435{ 1436 kmem_cache_destroy(ufs_inode_cachep); 1437} 1438 1439static const struct super_operations ufs_super_ops = { 1440 .alloc_inode = ufs_alloc_inode, 1441 .destroy_inode = ufs_destroy_inode, 1442 .write_inode = ufs_write_inode, 1443 .evict_inode = ufs_evict_inode, 1444 .put_super = ufs_put_super, 1445 .write_super = ufs_write_super, 1446 .sync_fs = ufs_sync_fs, 1447 .statfs = ufs_statfs, 1448 .remount_fs = ufs_remount, 1449 .show_options = ufs_show_options, 1450}; 1451 1452static int ufs_get_sb(struct file_system_type *fs_type, 1453 int flags, const char *dev_name, void *data, struct vfsmount *mnt) 1454{ 1455 return get_sb_bdev(fs_type, flags, dev_name, data, ufs_fill_super, mnt); 1456} 1457 1458static struct file_system_type ufs_fs_type = { 1459 .owner = THIS_MODULE, 1460 .name = "ufs", 1461 .get_sb = ufs_get_sb, 1462 .kill_sb = kill_block_super, 1463 .fs_flags = FS_REQUIRES_DEV, 1464}; 1465 1466static int __init init_ufs_fs(void) 1467{ 1468 int err = init_inodecache(); 1469 if (err) 1470 goto out1; 1471 err = register_filesystem(&ufs_fs_type); 1472 if (err) 1473 goto out; 1474 return 0; 1475out: 1476 destroy_inodecache(); 1477out1: 1478 return err; 1479} 1480 1481static void __exit exit_ufs_fs(void) 1482{ 1483 unregister_filesystem(&ufs_fs_type); 1484 destroy_inodecache(); 1485} 1486 1487module_init(init_ufs_fs) 1488module_exit(exit_ufs_fs) 1489MODULE_LICENSE("GPL"); 1490