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 #include <linux/exportfs.h> 69 #include <linux/module.h> 70 #include <linux/bitops.h> 71 72 #include <stdarg.h> 73 74 #include <asm/uaccess.h> 75 76 #include <linux/errno.h> 77 #include <linux/fs.h> 78 #include <linux/slab.h> 79 #include <linux/time.h> 80 #include <linux/stat.h> 81 #include <linux/string.h> 82 #include <linux/blkdev.h> 83 #include <linux/init.h> 84 #include <linux/parser.h> 85 #include <linux/buffer_head.h> 86 #include <linux/vfs.h> 87 #include <linux/log2.h> 88 #include <linux/mount.h> 89 #include <linux/seq_file.h> 90 91 #include "ufs_fs.h" 92 #include "ufs.h" 93 #include "swab.h" 94 #include "util.h" 95 96 void lock_ufs(struct super_block *sb) 97 { 98 #if defined(CONFIG_SMP) || defined (CONFIG_PREEMPT) 99 struct ufs_sb_info *sbi = UFS_SB(sb); 100 101 mutex_lock(&sbi->mutex); 102 sbi->mutex_owner = current; 103 #endif 104 } 105 106 void unlock_ufs(struct super_block *sb) 107 { 108 #if defined(CONFIG_SMP) || defined (CONFIG_PREEMPT) 109 struct ufs_sb_info *sbi = UFS_SB(sb); 110 111 sbi->mutex_owner = NULL; 112 mutex_unlock(&sbi->mutex); 113 #endif 114 } 115 116 static struct inode *ufs_nfs_get_inode(struct super_block *sb, u64 ino, u32 generation) 117 { 118 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 119 struct inode *inode; 120 121 if (ino < UFS_ROOTINO || ino > uspi->s_ncg * uspi->s_ipg) 122 return ERR_PTR(-ESTALE); 123 124 inode = ufs_iget(sb, ino); 125 if (IS_ERR(inode)) 126 return ERR_CAST(inode); 127 if (generation && inode->i_generation != generation) { 128 iput(inode); 129 return ERR_PTR(-ESTALE); 130 } 131 return inode; 132 } 133 134 static struct dentry *ufs_fh_to_dentry(struct super_block *sb, struct fid *fid, 135 int fh_len, int fh_type) 136 { 137 return generic_fh_to_dentry(sb, fid, fh_len, fh_type, ufs_nfs_get_inode); 138 } 139 140 static struct dentry *ufs_fh_to_parent(struct super_block *sb, struct fid *fid, 141 int fh_len, int fh_type) 142 { 143 return generic_fh_to_parent(sb, fid, fh_len, fh_type, ufs_nfs_get_inode); 144 } 145 146 static struct dentry *ufs_get_parent(struct dentry *child) 147 { 148 struct qstr dot_dot = QSTR_INIT("..", 2); 149 ino_t ino; 150 151 ino = ufs_inode_by_name(child->d_inode, &dot_dot); 152 if (!ino) 153 return ERR_PTR(-ENOENT); 154 return d_obtain_alias(ufs_iget(child->d_inode->i_sb, ino)); 155 } 156 157 static const struct export_operations ufs_export_ops = { 158 .fh_to_dentry = ufs_fh_to_dentry, 159 .fh_to_parent = ufs_fh_to_parent, 160 .get_parent = ufs_get_parent, 161 }; 162 163 #ifdef CONFIG_UFS_DEBUG 164 /* 165 * Print contents of ufs_super_block, useful for debugging 166 */ 167 static void ufs_print_super_stuff(struct super_block *sb, 168 struct ufs_super_block_first *usb1, 169 struct ufs_super_block_second *usb2, 170 struct ufs_super_block_third *usb3) 171 { 172 u32 magic = fs32_to_cpu(sb, usb3->fs_magic); 173 174 pr_debug("ufs_print_super_stuff\n"); 175 pr_debug(" magic: 0x%x\n", magic); 176 if (fs32_to_cpu(sb, usb3->fs_magic) == UFS2_MAGIC) { 177 pr_debug(" fs_size: %llu\n", (unsigned long long) 178 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size)); 179 pr_debug(" fs_dsize: %llu\n", (unsigned long long) 180 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize)); 181 pr_debug(" bsize: %u\n", 182 fs32_to_cpu(sb, usb1->fs_bsize)); 183 pr_debug(" fsize: %u\n", 184 fs32_to_cpu(sb, usb1->fs_fsize)); 185 pr_debug(" fs_volname: %s\n", usb2->fs_un.fs_u2.fs_volname); 186 pr_debug(" fs_sblockloc: %llu\n", (unsigned long long) 187 fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc)); 188 pr_debug(" cs_ndir(No of dirs): %llu\n", (unsigned long long) 189 fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir)); 190 pr_debug(" cs_nbfree(No of free blocks): %llu\n", 191 (unsigned long long) 192 fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree)); 193 pr_info(" cs_nifree(Num of free inodes): %llu\n", 194 (unsigned long long) 195 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree)); 196 pr_info(" cs_nffree(Num of free frags): %llu\n", 197 (unsigned long long) 198 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree)); 199 pr_info(" fs_maxsymlinklen: %u\n", 200 fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen)); 201 } else { 202 pr_debug(" sblkno: %u\n", fs32_to_cpu(sb, usb1->fs_sblkno)); 203 pr_debug(" cblkno: %u\n", fs32_to_cpu(sb, usb1->fs_cblkno)); 204 pr_debug(" iblkno: %u\n", fs32_to_cpu(sb, usb1->fs_iblkno)); 205 pr_debug(" dblkno: %u\n", fs32_to_cpu(sb, usb1->fs_dblkno)); 206 pr_debug(" cgoffset: %u\n", 207 fs32_to_cpu(sb, usb1->fs_cgoffset)); 208 pr_debug(" ~cgmask: 0x%x\n", 209 ~fs32_to_cpu(sb, usb1->fs_cgmask)); 210 pr_debug(" size: %u\n", fs32_to_cpu(sb, usb1->fs_size)); 211 pr_debug(" dsize: %u\n", fs32_to_cpu(sb, usb1->fs_dsize)); 212 pr_debug(" ncg: %u\n", fs32_to_cpu(sb, usb1->fs_ncg)); 213 pr_debug(" bsize: %u\n", fs32_to_cpu(sb, usb1->fs_bsize)); 214 pr_debug(" fsize: %u\n", fs32_to_cpu(sb, usb1->fs_fsize)); 215 pr_debug(" frag: %u\n", fs32_to_cpu(sb, usb1->fs_frag)); 216 pr_debug(" fragshift: %u\n", 217 fs32_to_cpu(sb, usb1->fs_fragshift)); 218 pr_debug(" ~fmask: %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask)); 219 pr_debug(" fshift: %u\n", fs32_to_cpu(sb, usb1->fs_fshift)); 220 pr_debug(" sbsize: %u\n", fs32_to_cpu(sb, usb1->fs_sbsize)); 221 pr_debug(" spc: %u\n", fs32_to_cpu(sb, usb1->fs_spc)); 222 pr_debug(" cpg: %u\n", fs32_to_cpu(sb, usb1->fs_cpg)); 223 pr_debug(" ipg: %u\n", fs32_to_cpu(sb, usb1->fs_ipg)); 224 pr_debug(" fpg: %u\n", fs32_to_cpu(sb, usb1->fs_fpg)); 225 pr_debug(" csaddr: %u\n", fs32_to_cpu(sb, usb1->fs_csaddr)); 226 pr_debug(" cssize: %u\n", fs32_to_cpu(sb, usb1->fs_cssize)); 227 pr_debug(" cgsize: %u\n", fs32_to_cpu(sb, usb1->fs_cgsize)); 228 pr_debug(" fstodb: %u\n", 229 fs32_to_cpu(sb, usb1->fs_fsbtodb)); 230 pr_debug(" nrpos: %u\n", fs32_to_cpu(sb, usb3->fs_nrpos)); 231 pr_debug(" ndir %u\n", 232 fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir)); 233 pr_debug(" nifree %u\n", 234 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree)); 235 pr_debug(" nbfree %u\n", 236 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree)); 237 pr_debug(" nffree %u\n", 238 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree)); 239 } 240 pr_debug("\n"); 241 } 242 243 /* 244 * Print contents of ufs_cylinder_group, useful for debugging 245 */ 246 static void ufs_print_cylinder_stuff(struct super_block *sb, 247 struct ufs_cylinder_group *cg) 248 { 249 pr_debug("\nufs_print_cylinder_stuff\n"); 250 pr_debug("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group)); 251 pr_debug(" magic: %x\n", fs32_to_cpu(sb, cg->cg_magic)); 252 pr_debug(" time: %u\n", fs32_to_cpu(sb, cg->cg_time)); 253 pr_debug(" cgx: %u\n", fs32_to_cpu(sb, cg->cg_cgx)); 254 pr_debug(" ncyl: %u\n", fs16_to_cpu(sb, cg->cg_ncyl)); 255 pr_debug(" niblk: %u\n", fs16_to_cpu(sb, cg->cg_niblk)); 256 pr_debug(" ndblk: %u\n", fs32_to_cpu(sb, cg->cg_ndblk)); 257 pr_debug(" cs_ndir: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir)); 258 pr_debug(" cs_nbfree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree)); 259 pr_debug(" cs_nifree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree)); 260 pr_debug(" cs_nffree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree)); 261 pr_debug(" rotor: %u\n", fs32_to_cpu(sb, cg->cg_rotor)); 262 pr_debug(" frotor: %u\n", fs32_to_cpu(sb, cg->cg_frotor)); 263 pr_debug(" irotor: %u\n", fs32_to_cpu(sb, cg->cg_irotor)); 264 pr_debug(" frsum: %u, %u, %u, %u, %u, %u, %u, %u\n", 265 fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]), 266 fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]), 267 fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]), 268 fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7])); 269 pr_debug(" btotoff: %u\n", fs32_to_cpu(sb, cg->cg_btotoff)); 270 pr_debug(" boff: %u\n", fs32_to_cpu(sb, cg->cg_boff)); 271 pr_debug(" iuseoff: %u\n", fs32_to_cpu(sb, cg->cg_iusedoff)); 272 pr_debug(" freeoff: %u\n", fs32_to_cpu(sb, cg->cg_freeoff)); 273 pr_debug(" nextfreeoff: %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff)); 274 pr_debug(" clustersumoff %u\n", 275 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff)); 276 pr_debug(" clusteroff %u\n", 277 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff)); 278 pr_debug(" nclusterblks %u\n", 279 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks)); 280 pr_debug("\n"); 281 } 282 #else 283 # define ufs_print_super_stuff(sb, usb1, usb2, usb3) /**/ 284 # define ufs_print_cylinder_stuff(sb, cg) /**/ 285 #endif /* CONFIG_UFS_DEBUG */ 286 287 static const struct super_operations ufs_super_ops; 288 289 void ufs_error (struct super_block * sb, const char * function, 290 const char * fmt, ...) 291 { 292 struct ufs_sb_private_info * uspi; 293 struct ufs_super_block_first * usb1; 294 struct va_format vaf; 295 va_list args; 296 297 uspi = UFS_SB(sb)->s_uspi; 298 usb1 = ubh_get_usb_first(uspi); 299 300 if (!(sb->s_flags & MS_RDONLY)) { 301 usb1->fs_clean = UFS_FSBAD; 302 ubh_mark_buffer_dirty(USPI_UBH(uspi)); 303 ufs_mark_sb_dirty(sb); 304 sb->s_flags |= MS_RDONLY; 305 } 306 va_start(args, fmt); 307 vaf.fmt = fmt; 308 vaf.va = &args; 309 switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) { 310 case UFS_MOUNT_ONERROR_PANIC: 311 panic("panic (device %s): %s: %pV\n", 312 sb->s_id, function, &vaf); 313 314 case UFS_MOUNT_ONERROR_LOCK: 315 case UFS_MOUNT_ONERROR_UMOUNT: 316 case UFS_MOUNT_ONERROR_REPAIR: 317 pr_crit("error (device %s): %s: %pV\n", 318 sb->s_id, function, &vaf); 319 } 320 va_end(args); 321 } 322 323 void ufs_panic (struct super_block * sb, const char * function, 324 const char * fmt, ...) 325 { 326 struct ufs_sb_private_info * uspi; 327 struct ufs_super_block_first * usb1; 328 struct va_format vaf; 329 va_list args; 330 331 uspi = UFS_SB(sb)->s_uspi; 332 usb1 = ubh_get_usb_first(uspi); 333 334 if (!(sb->s_flags & MS_RDONLY)) { 335 usb1->fs_clean = UFS_FSBAD; 336 ubh_mark_buffer_dirty(USPI_UBH(uspi)); 337 ufs_mark_sb_dirty(sb); 338 } 339 va_start(args, fmt); 340 vaf.fmt = fmt; 341 vaf.va = &args; 342 sb->s_flags |= MS_RDONLY; 343 pr_crit("panic (device %s): %s: %pV\n", 344 sb->s_id, function, &vaf); 345 va_end(args); 346 } 347 348 void ufs_warning (struct super_block * sb, const char * function, 349 const char * fmt, ...) 350 { 351 struct va_format vaf; 352 va_list args; 353 354 va_start(args, fmt); 355 vaf.fmt = fmt; 356 vaf.va = &args; 357 pr_warn("(device %s): %s: %pV\n", 358 sb->s_id, function, &vaf); 359 va_end(args); 360 } 361 362 enum { 363 Opt_type_old = UFS_MOUNT_UFSTYPE_OLD, 364 Opt_type_sunx86 = UFS_MOUNT_UFSTYPE_SUNx86, 365 Opt_type_sun = UFS_MOUNT_UFSTYPE_SUN, 366 Opt_type_sunos = UFS_MOUNT_UFSTYPE_SUNOS, 367 Opt_type_44bsd = UFS_MOUNT_UFSTYPE_44BSD, 368 Opt_type_ufs2 = UFS_MOUNT_UFSTYPE_UFS2, 369 Opt_type_hp = UFS_MOUNT_UFSTYPE_HP, 370 Opt_type_nextstepcd = UFS_MOUNT_UFSTYPE_NEXTSTEP_CD, 371 Opt_type_nextstep = UFS_MOUNT_UFSTYPE_NEXTSTEP, 372 Opt_type_openstep = UFS_MOUNT_UFSTYPE_OPENSTEP, 373 Opt_onerror_panic = UFS_MOUNT_ONERROR_PANIC, 374 Opt_onerror_lock = UFS_MOUNT_ONERROR_LOCK, 375 Opt_onerror_umount = UFS_MOUNT_ONERROR_UMOUNT, 376 Opt_onerror_repair = UFS_MOUNT_ONERROR_REPAIR, 377 Opt_err 378 }; 379 380 static const match_table_t tokens = { 381 {Opt_type_old, "ufstype=old"}, 382 {Opt_type_sunx86, "ufstype=sunx86"}, 383 {Opt_type_sun, "ufstype=sun"}, 384 {Opt_type_sunos, "ufstype=sunos"}, 385 {Opt_type_44bsd, "ufstype=44bsd"}, 386 {Opt_type_ufs2, "ufstype=ufs2"}, 387 {Opt_type_ufs2, "ufstype=5xbsd"}, 388 {Opt_type_hp, "ufstype=hp"}, 389 {Opt_type_nextstepcd, "ufstype=nextstep-cd"}, 390 {Opt_type_nextstep, "ufstype=nextstep"}, 391 {Opt_type_openstep, "ufstype=openstep"}, 392 /*end of possible ufs types */ 393 {Opt_onerror_panic, "onerror=panic"}, 394 {Opt_onerror_lock, "onerror=lock"}, 395 {Opt_onerror_umount, "onerror=umount"}, 396 {Opt_onerror_repair, "onerror=repair"}, 397 {Opt_err, NULL} 398 }; 399 400 static int ufs_parse_options (char * options, unsigned * mount_options) 401 { 402 char * p; 403 404 UFSD("ENTER\n"); 405 406 if (!options) 407 return 1; 408 409 while ((p = strsep(&options, ",")) != NULL) { 410 substring_t args[MAX_OPT_ARGS]; 411 int token; 412 if (!*p) 413 continue; 414 415 token = match_token(p, tokens, args); 416 switch (token) { 417 case Opt_type_old: 418 ufs_clear_opt (*mount_options, UFSTYPE); 419 ufs_set_opt (*mount_options, UFSTYPE_OLD); 420 break; 421 case Opt_type_sunx86: 422 ufs_clear_opt (*mount_options, UFSTYPE); 423 ufs_set_opt (*mount_options, UFSTYPE_SUNx86); 424 break; 425 case Opt_type_sun: 426 ufs_clear_opt (*mount_options, UFSTYPE); 427 ufs_set_opt (*mount_options, UFSTYPE_SUN); 428 break; 429 case Opt_type_sunos: 430 ufs_clear_opt(*mount_options, UFSTYPE); 431 ufs_set_opt(*mount_options, UFSTYPE_SUNOS); 432 break; 433 case Opt_type_44bsd: 434 ufs_clear_opt (*mount_options, UFSTYPE); 435 ufs_set_opt (*mount_options, UFSTYPE_44BSD); 436 break; 437 case Opt_type_ufs2: 438 ufs_clear_opt(*mount_options, UFSTYPE); 439 ufs_set_opt(*mount_options, UFSTYPE_UFS2); 440 break; 441 case Opt_type_hp: 442 ufs_clear_opt (*mount_options, UFSTYPE); 443 ufs_set_opt (*mount_options, UFSTYPE_HP); 444 break; 445 case Opt_type_nextstepcd: 446 ufs_clear_opt (*mount_options, UFSTYPE); 447 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD); 448 break; 449 case Opt_type_nextstep: 450 ufs_clear_opt (*mount_options, UFSTYPE); 451 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP); 452 break; 453 case Opt_type_openstep: 454 ufs_clear_opt (*mount_options, UFSTYPE); 455 ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP); 456 break; 457 case Opt_onerror_panic: 458 ufs_clear_opt (*mount_options, ONERROR); 459 ufs_set_opt (*mount_options, ONERROR_PANIC); 460 break; 461 case Opt_onerror_lock: 462 ufs_clear_opt (*mount_options, ONERROR); 463 ufs_set_opt (*mount_options, ONERROR_LOCK); 464 break; 465 case Opt_onerror_umount: 466 ufs_clear_opt (*mount_options, ONERROR); 467 ufs_set_opt (*mount_options, ONERROR_UMOUNT); 468 break; 469 case Opt_onerror_repair: 470 pr_err("Unable to do repair on error, will lock lock instead\n"); 471 ufs_clear_opt (*mount_options, ONERROR); 472 ufs_set_opt (*mount_options, ONERROR_REPAIR); 473 break; 474 default: 475 pr_err("Invalid option: \"%s\" or missing value\n", p); 476 return 0; 477 } 478 } 479 return 1; 480 } 481 482 /* 483 * Different types of UFS hold fs_cstotal in different 484 * places, and use different data structure for it. 485 * To make things simpler we just copy fs_cstotal to ufs_sb_private_info 486 */ 487 static void ufs_setup_cstotal(struct super_block *sb) 488 { 489 struct ufs_sb_info *sbi = UFS_SB(sb); 490 struct ufs_sb_private_info *uspi = sbi->s_uspi; 491 struct ufs_super_block_first *usb1; 492 struct ufs_super_block_second *usb2; 493 struct ufs_super_block_third *usb3; 494 unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE; 495 496 UFSD("ENTER, mtype=%u\n", mtype); 497 usb1 = ubh_get_usb_first(uspi); 498 usb2 = ubh_get_usb_second(uspi); 499 usb3 = ubh_get_usb_third(uspi); 500 501 if ((mtype == UFS_MOUNT_UFSTYPE_44BSD && 502 (usb1->fs_flags & UFS_FLAGS_UPDATED)) || 503 mtype == UFS_MOUNT_UFSTYPE_UFS2) { 504 /*we have statistic in different place, then usual*/ 505 uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir); 506 uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree); 507 uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree); 508 uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree); 509 } else { 510 uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir); 511 uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree); 512 uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree); 513 uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree); 514 } 515 UFSD("EXIT\n"); 516 } 517 518 /* 519 * Read on-disk structures associated with cylinder groups 520 */ 521 static int ufs_read_cylinder_structures(struct super_block *sb) 522 { 523 struct ufs_sb_info *sbi = UFS_SB(sb); 524 struct ufs_sb_private_info *uspi = sbi->s_uspi; 525 struct ufs_buffer_head * ubh; 526 unsigned char * base, * space; 527 unsigned size, blks, i; 528 529 UFSD("ENTER\n"); 530 531 /* 532 * Read cs structures from (usually) first data block 533 * on the device. 534 */ 535 size = uspi->s_cssize; 536 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift; 537 base = space = kmalloc(size, GFP_NOFS); 538 if (!base) 539 goto failed; 540 sbi->s_csp = (struct ufs_csum *)space; 541 for (i = 0; i < blks; i += uspi->s_fpb) { 542 size = uspi->s_bsize; 543 if (i + uspi->s_fpb > blks) 544 size = (blks - i) * uspi->s_fsize; 545 546 ubh = ubh_bread(sb, uspi->s_csaddr + i, size); 547 548 if (!ubh) 549 goto failed; 550 551 ubh_ubhcpymem (space, ubh, size); 552 553 space += size; 554 ubh_brelse (ubh); 555 ubh = NULL; 556 } 557 558 /* 559 * Read cylinder group (we read only first fragment from block 560 * at this time) and prepare internal data structures for cg caching. 561 */ 562 if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_NOFS))) 563 goto failed; 564 for (i = 0; i < uspi->s_ncg; i++) 565 sbi->s_ucg[i] = NULL; 566 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) { 567 sbi->s_ucpi[i] = NULL; 568 sbi->s_cgno[i] = UFS_CGNO_EMPTY; 569 } 570 for (i = 0; i < uspi->s_ncg; i++) { 571 UFSD("read cg %u\n", i); 572 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i)))) 573 goto failed; 574 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data)) 575 goto failed; 576 577 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data); 578 } 579 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) { 580 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_NOFS))) 581 goto failed; 582 sbi->s_cgno[i] = UFS_CGNO_EMPTY; 583 } 584 sbi->s_cg_loaded = 0; 585 UFSD("EXIT\n"); 586 return 1; 587 588 failed: 589 kfree (base); 590 if (sbi->s_ucg) { 591 for (i = 0; i < uspi->s_ncg; i++) 592 if (sbi->s_ucg[i]) 593 brelse (sbi->s_ucg[i]); 594 kfree (sbi->s_ucg); 595 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) 596 kfree (sbi->s_ucpi[i]); 597 } 598 UFSD("EXIT (FAILED)\n"); 599 return 0; 600 } 601 602 /* 603 * Sync our internal copy of fs_cstotal with disk 604 */ 605 static void ufs_put_cstotal(struct super_block *sb) 606 { 607 unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE; 608 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 609 struct ufs_super_block_first *usb1; 610 struct ufs_super_block_second *usb2; 611 struct ufs_super_block_third *usb3; 612 613 UFSD("ENTER\n"); 614 usb1 = ubh_get_usb_first(uspi); 615 usb2 = ubh_get_usb_second(uspi); 616 usb3 = ubh_get_usb_third(uspi); 617 618 if ((mtype == UFS_MOUNT_UFSTYPE_44BSD && 619 (usb1->fs_flags & UFS_FLAGS_UPDATED)) || 620 mtype == UFS_MOUNT_UFSTYPE_UFS2) { 621 /*we have statistic in different place, then usual*/ 622 usb2->fs_un.fs_u2.cs_ndir = 623 cpu_to_fs64(sb, uspi->cs_total.cs_ndir); 624 usb2->fs_un.fs_u2.cs_nbfree = 625 cpu_to_fs64(sb, uspi->cs_total.cs_nbfree); 626 usb3->fs_un1.fs_u2.cs_nifree = 627 cpu_to_fs64(sb, uspi->cs_total.cs_nifree); 628 usb3->fs_un1.fs_u2.cs_nffree = 629 cpu_to_fs64(sb, uspi->cs_total.cs_nffree); 630 } else { 631 usb1->fs_cstotal.cs_ndir = 632 cpu_to_fs32(sb, uspi->cs_total.cs_ndir); 633 usb1->fs_cstotal.cs_nbfree = 634 cpu_to_fs32(sb, uspi->cs_total.cs_nbfree); 635 usb1->fs_cstotal.cs_nifree = 636 cpu_to_fs32(sb, uspi->cs_total.cs_nifree); 637 usb1->fs_cstotal.cs_nffree = 638 cpu_to_fs32(sb, uspi->cs_total.cs_nffree); 639 } 640 ubh_mark_buffer_dirty(USPI_UBH(uspi)); 641 ufs_print_super_stuff(sb, usb1, usb2, usb3); 642 UFSD("EXIT\n"); 643 } 644 645 /** 646 * ufs_put_super_internal() - put on-disk intrenal structures 647 * @sb: pointer to super_block structure 648 * Put on-disk structures associated with cylinder groups 649 * and write them back to disk, also update cs_total on disk 650 */ 651 static void ufs_put_super_internal(struct super_block *sb) 652 { 653 struct ufs_sb_info *sbi = UFS_SB(sb); 654 struct ufs_sb_private_info *uspi = sbi->s_uspi; 655 struct ufs_buffer_head * ubh; 656 unsigned char * base, * space; 657 unsigned blks, size, i; 658 659 660 UFSD("ENTER\n"); 661 662 ufs_put_cstotal(sb); 663 size = uspi->s_cssize; 664 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift; 665 base = space = (char*) sbi->s_csp; 666 for (i = 0; i < blks; i += uspi->s_fpb) { 667 size = uspi->s_bsize; 668 if (i + uspi->s_fpb > blks) 669 size = (blks - i) * uspi->s_fsize; 670 671 ubh = ubh_bread(sb, uspi->s_csaddr + i, size); 672 673 ubh_memcpyubh (ubh, space, size); 674 space += size; 675 ubh_mark_buffer_uptodate (ubh, 1); 676 ubh_mark_buffer_dirty (ubh); 677 ubh_brelse (ubh); 678 } 679 for (i = 0; i < sbi->s_cg_loaded; i++) { 680 ufs_put_cylinder (sb, i); 681 kfree (sbi->s_ucpi[i]); 682 } 683 for (; i < UFS_MAX_GROUP_LOADED; i++) 684 kfree (sbi->s_ucpi[i]); 685 for (i = 0; i < uspi->s_ncg; i++) 686 brelse (sbi->s_ucg[i]); 687 kfree (sbi->s_ucg); 688 kfree (base); 689 690 UFSD("EXIT\n"); 691 } 692 693 static int ufs_sync_fs(struct super_block *sb, int wait) 694 { 695 struct ufs_sb_private_info * uspi; 696 struct ufs_super_block_first * usb1; 697 struct ufs_super_block_third * usb3; 698 unsigned flags; 699 700 lock_ufs(sb); 701 702 UFSD("ENTER\n"); 703 704 flags = UFS_SB(sb)->s_flags; 705 uspi = UFS_SB(sb)->s_uspi; 706 usb1 = ubh_get_usb_first(uspi); 707 usb3 = ubh_get_usb_third(uspi); 708 709 usb1->fs_time = cpu_to_fs32(sb, get_seconds()); 710 if ((flags & UFS_ST_MASK) == UFS_ST_SUN || 711 (flags & UFS_ST_MASK) == UFS_ST_SUNOS || 712 (flags & UFS_ST_MASK) == UFS_ST_SUNx86) 713 ufs_set_fs_state(sb, usb1, usb3, 714 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time)); 715 ufs_put_cstotal(sb); 716 717 UFSD("EXIT\n"); 718 unlock_ufs(sb); 719 720 return 0; 721 } 722 723 static void delayed_sync_fs(struct work_struct *work) 724 { 725 struct ufs_sb_info *sbi; 726 727 sbi = container_of(work, struct ufs_sb_info, sync_work.work); 728 729 spin_lock(&sbi->work_lock); 730 sbi->work_queued = 0; 731 spin_unlock(&sbi->work_lock); 732 733 ufs_sync_fs(sbi->sb, 1); 734 } 735 736 void ufs_mark_sb_dirty(struct super_block *sb) 737 { 738 struct ufs_sb_info *sbi = UFS_SB(sb); 739 unsigned long delay; 740 741 spin_lock(&sbi->work_lock); 742 if (!sbi->work_queued) { 743 delay = msecs_to_jiffies(dirty_writeback_interval * 10); 744 queue_delayed_work(system_long_wq, &sbi->sync_work, delay); 745 sbi->work_queued = 1; 746 } 747 spin_unlock(&sbi->work_lock); 748 } 749 750 static void ufs_put_super(struct super_block *sb) 751 { 752 struct ufs_sb_info * sbi = UFS_SB(sb); 753 754 UFSD("ENTER\n"); 755 756 if (!(sb->s_flags & MS_RDONLY)) 757 ufs_put_super_internal(sb); 758 cancel_delayed_work_sync(&sbi->sync_work); 759 760 ubh_brelse_uspi (sbi->s_uspi); 761 kfree (sbi->s_uspi); 762 mutex_destroy(&sbi->mutex); 763 kfree (sbi); 764 sb->s_fs_info = NULL; 765 UFSD("EXIT\n"); 766 return; 767 } 768 769 static int ufs_fill_super(struct super_block *sb, void *data, int silent) 770 { 771 struct ufs_sb_info * sbi; 772 struct ufs_sb_private_info * uspi; 773 struct ufs_super_block_first * usb1; 774 struct ufs_super_block_second * usb2; 775 struct ufs_super_block_third * usb3; 776 struct ufs_buffer_head * ubh; 777 struct inode *inode; 778 unsigned block_size, super_block_size; 779 unsigned flags; 780 unsigned super_block_offset; 781 unsigned maxsymlen; 782 int ret = -EINVAL; 783 784 uspi = NULL; 785 ubh = NULL; 786 flags = 0; 787 788 UFSD("ENTER\n"); 789 790 #ifndef CONFIG_UFS_FS_WRITE 791 if (!(sb->s_flags & MS_RDONLY)) { 792 pr_err("ufs was compiled with read-only support, can't be mounted as read-write\n"); 793 return -EROFS; 794 } 795 #endif 796 797 sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL); 798 if (!sbi) 799 goto failed_nomem; 800 sb->s_fs_info = sbi; 801 sbi->sb = sb; 802 803 UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY)); 804 805 mutex_init(&sbi->mutex); 806 spin_lock_init(&sbi->work_lock); 807 INIT_DELAYED_WORK(&sbi->sync_work, delayed_sync_fs); 808 /* 809 * Set default mount options 810 * Parse mount options 811 */ 812 sbi->s_mount_opt = 0; 813 ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK); 814 if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) { 815 pr_err("wrong mount options\n"); 816 goto failed; 817 } 818 if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) { 819 if (!silent) 820 pr_err("You didn't specify the type of your ufs filesystem\n\n" 821 "mount -t ufs -o ufstype=" 822 "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n" 823 ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, " 824 "default is ufstype=old\n"); 825 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD); 826 } 827 828 uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL); 829 sbi->s_uspi = uspi; 830 if (!uspi) 831 goto failed; 832 uspi->s_dirblksize = UFS_SECTOR_SIZE; 833 super_block_offset=UFS_SBLOCK; 834 835 /* Keep 2Gig file limit. Some UFS variants need to override 836 this but as I don't know which I'll let those in the know loosen 837 the rules */ 838 switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) { 839 case UFS_MOUNT_UFSTYPE_44BSD: 840 UFSD("ufstype=44bsd\n"); 841 uspi->s_fsize = block_size = 512; 842 uspi->s_fmask = ~(512 - 1); 843 uspi->s_fshift = 9; 844 uspi->s_sbsize = super_block_size = 1536; 845 uspi->s_sbbase = 0; 846 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; 847 break; 848 case UFS_MOUNT_UFSTYPE_UFS2: 849 UFSD("ufstype=ufs2\n"); 850 super_block_offset=SBLOCK_UFS2; 851 uspi->s_fsize = block_size = 512; 852 uspi->s_fmask = ~(512 - 1); 853 uspi->s_fshift = 9; 854 uspi->s_sbsize = super_block_size = 1536; 855 uspi->s_sbbase = 0; 856 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; 857 break; 858 859 case UFS_MOUNT_UFSTYPE_SUN: 860 UFSD("ufstype=sun\n"); 861 uspi->s_fsize = block_size = 1024; 862 uspi->s_fmask = ~(1024 - 1); 863 uspi->s_fshift = 10; 864 uspi->s_sbsize = super_block_size = 2048; 865 uspi->s_sbbase = 0; 866 uspi->s_maxsymlinklen = 0; /* Not supported on disk */ 867 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN; 868 break; 869 870 case UFS_MOUNT_UFSTYPE_SUNOS: 871 UFSD("ufstype=sunos\n"); 872 uspi->s_fsize = block_size = 1024; 873 uspi->s_fmask = ~(1024 - 1); 874 uspi->s_fshift = 10; 875 uspi->s_sbsize = 2048; 876 super_block_size = 2048; 877 uspi->s_sbbase = 0; 878 uspi->s_maxsymlinklen = 0; /* Not supported on disk */ 879 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_SUNOS | UFS_CG_SUN; 880 break; 881 882 case UFS_MOUNT_UFSTYPE_SUNx86: 883 UFSD("ufstype=sunx86\n"); 884 uspi->s_fsize = block_size = 1024; 885 uspi->s_fmask = ~(1024 - 1); 886 uspi->s_fshift = 10; 887 uspi->s_sbsize = super_block_size = 2048; 888 uspi->s_sbbase = 0; 889 uspi->s_maxsymlinklen = 0; /* Not supported on disk */ 890 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN; 891 break; 892 893 case UFS_MOUNT_UFSTYPE_OLD: 894 UFSD("ufstype=old\n"); 895 uspi->s_fsize = block_size = 1024; 896 uspi->s_fmask = ~(1024 - 1); 897 uspi->s_fshift = 10; 898 uspi->s_sbsize = super_block_size = 2048; 899 uspi->s_sbbase = 0; 900 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 901 if (!(sb->s_flags & MS_RDONLY)) { 902 if (!silent) 903 pr_info("ufstype=old is supported read-only\n"); 904 sb->s_flags |= MS_RDONLY; 905 } 906 break; 907 908 case UFS_MOUNT_UFSTYPE_NEXTSTEP: 909 UFSD("ufstype=nextstep\n"); 910 uspi->s_fsize = block_size = 1024; 911 uspi->s_fmask = ~(1024 - 1); 912 uspi->s_fshift = 10; 913 uspi->s_sbsize = super_block_size = 2048; 914 uspi->s_sbbase = 0; 915 uspi->s_dirblksize = 1024; 916 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 917 if (!(sb->s_flags & MS_RDONLY)) { 918 if (!silent) 919 pr_info("ufstype=nextstep is supported read-only\n"); 920 sb->s_flags |= MS_RDONLY; 921 } 922 break; 923 924 case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD: 925 UFSD("ufstype=nextstep-cd\n"); 926 uspi->s_fsize = block_size = 2048; 927 uspi->s_fmask = ~(2048 - 1); 928 uspi->s_fshift = 11; 929 uspi->s_sbsize = super_block_size = 2048; 930 uspi->s_sbbase = 0; 931 uspi->s_dirblksize = 1024; 932 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 933 if (!(sb->s_flags & MS_RDONLY)) { 934 if (!silent) 935 pr_info("ufstype=nextstep-cd is supported read-only\n"); 936 sb->s_flags |= MS_RDONLY; 937 } 938 break; 939 940 case UFS_MOUNT_UFSTYPE_OPENSTEP: 941 UFSD("ufstype=openstep\n"); 942 uspi->s_fsize = block_size = 1024; 943 uspi->s_fmask = ~(1024 - 1); 944 uspi->s_fshift = 10; 945 uspi->s_sbsize = super_block_size = 2048; 946 uspi->s_sbbase = 0; 947 uspi->s_dirblksize = 1024; 948 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; 949 if (!(sb->s_flags & MS_RDONLY)) { 950 if (!silent) 951 pr_info("ufstype=openstep is supported read-only\n"); 952 sb->s_flags |= MS_RDONLY; 953 } 954 break; 955 956 case UFS_MOUNT_UFSTYPE_HP: 957 UFSD("ufstype=hp\n"); 958 uspi->s_fsize = block_size = 1024; 959 uspi->s_fmask = ~(1024 - 1); 960 uspi->s_fshift = 10; 961 uspi->s_sbsize = super_block_size = 2048; 962 uspi->s_sbbase = 0; 963 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 964 if (!(sb->s_flags & MS_RDONLY)) { 965 if (!silent) 966 pr_info("ufstype=hp is supported read-only\n"); 967 sb->s_flags |= MS_RDONLY; 968 } 969 break; 970 default: 971 if (!silent) 972 pr_err("unknown ufstype\n"); 973 goto failed; 974 } 975 976 again: 977 if (!sb_set_blocksize(sb, block_size)) { 978 pr_err("failed to set blocksize\n"); 979 goto failed; 980 } 981 982 /* 983 * read ufs super block from device 984 */ 985 986 ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size); 987 988 if (!ubh) 989 goto failed; 990 991 usb1 = ubh_get_usb_first(uspi); 992 usb2 = ubh_get_usb_second(uspi); 993 usb3 = ubh_get_usb_third(uspi); 994 995 /* Sort out mod used on SunOS 4.1.3 for fs_state */ 996 uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat); 997 if (((flags & UFS_ST_MASK) == UFS_ST_SUNOS) && 998 (uspi->s_postblformat != UFS_42POSTBLFMT)) { 999 flags &= ~UFS_ST_MASK; 1000 flags |= UFS_ST_SUN; 1001 } 1002 1003 /* 1004 * Check ufs magic number 1005 */ 1006 sbi->s_bytesex = BYTESEX_LE; 1007 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) { 1008 case UFS_MAGIC: 1009 case UFS_MAGIC_BW: 1010 case UFS2_MAGIC: 1011 case UFS_MAGIC_LFN: 1012 case UFS_MAGIC_FEA: 1013 case UFS_MAGIC_4GB: 1014 goto magic_found; 1015 } 1016 sbi->s_bytesex = BYTESEX_BE; 1017 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) { 1018 case UFS_MAGIC: 1019 case UFS_MAGIC_BW: 1020 case UFS2_MAGIC: 1021 case UFS_MAGIC_LFN: 1022 case UFS_MAGIC_FEA: 1023 case UFS_MAGIC_4GB: 1024 goto magic_found; 1025 } 1026 1027 if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP) 1028 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD) 1029 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP)) 1030 && uspi->s_sbbase < 256) { 1031 ubh_brelse_uspi(uspi); 1032 ubh = NULL; 1033 uspi->s_sbbase += 8; 1034 goto again; 1035 } 1036 if (!silent) 1037 pr_err("%s(): bad magic number\n", __func__); 1038 goto failed; 1039 1040 magic_found: 1041 /* 1042 * Check block and fragment sizes 1043 */ 1044 uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize); 1045 uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize); 1046 uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize); 1047 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask); 1048 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift); 1049 1050 if (!is_power_of_2(uspi->s_fsize)) { 1051 pr_err("%s(): fragment size %u is not a power of 2\n", 1052 __func__, uspi->s_fsize); 1053 goto failed; 1054 } 1055 if (uspi->s_fsize < 512) { 1056 pr_err("%s(): fragment size %u is too small\n", 1057 __func__, uspi->s_fsize); 1058 goto failed; 1059 } 1060 if (uspi->s_fsize > 4096) { 1061 pr_err("%s(): fragment size %u is too large\n", 1062 __func__, uspi->s_fsize); 1063 goto failed; 1064 } 1065 if (!is_power_of_2(uspi->s_bsize)) { 1066 pr_err("%s(): block size %u is not a power of 2\n", 1067 __func__, uspi->s_bsize); 1068 goto failed; 1069 } 1070 if (uspi->s_bsize < 4096) { 1071 pr_err("%s(): block size %u is too small\n", 1072 __func__, uspi->s_bsize); 1073 goto failed; 1074 } 1075 if (uspi->s_bsize / uspi->s_fsize > 8) { 1076 pr_err("%s(): too many fragments per block (%u)\n", 1077 __func__, uspi->s_bsize / uspi->s_fsize); 1078 goto failed; 1079 } 1080 if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) { 1081 ubh_brelse_uspi(uspi); 1082 ubh = NULL; 1083 block_size = uspi->s_fsize; 1084 super_block_size = uspi->s_sbsize; 1085 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size); 1086 goto again; 1087 } 1088 1089 sbi->s_flags = flags;/*after that line some functions use s_flags*/ 1090 ufs_print_super_stuff(sb, usb1, usb2, usb3); 1091 1092 /* 1093 * Check, if file system was correctly unmounted. 1094 * If not, make it read only. 1095 */ 1096 if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) || 1097 ((flags & UFS_ST_MASK) == UFS_ST_OLD) || 1098 (((flags & UFS_ST_MASK) == UFS_ST_SUN || 1099 (flags & UFS_ST_MASK) == UFS_ST_SUNOS || 1100 (flags & UFS_ST_MASK) == UFS_ST_SUNx86) && 1101 (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) { 1102 switch(usb1->fs_clean) { 1103 case UFS_FSCLEAN: 1104 UFSD("fs is clean\n"); 1105 break; 1106 case UFS_FSSTABLE: 1107 UFSD("fs is stable\n"); 1108 break; 1109 case UFS_FSLOG: 1110 UFSD("fs is logging fs\n"); 1111 break; 1112 case UFS_FSOSF1: 1113 UFSD("fs is DEC OSF/1\n"); 1114 break; 1115 case UFS_FSACTIVE: 1116 pr_err("%s(): fs is active\n", __func__); 1117 sb->s_flags |= MS_RDONLY; 1118 break; 1119 case UFS_FSBAD: 1120 pr_err("%s(): fs is bad\n", __func__); 1121 sb->s_flags |= MS_RDONLY; 1122 break; 1123 default: 1124 pr_err("%s(): can't grok fs_clean 0x%x\n", 1125 __func__, usb1->fs_clean); 1126 sb->s_flags |= MS_RDONLY; 1127 break; 1128 } 1129 } else { 1130 pr_err("%s(): fs needs fsck\n", __func__); 1131 sb->s_flags |= MS_RDONLY; 1132 } 1133 1134 /* 1135 * Read ufs_super_block into internal data structures 1136 */ 1137 sb->s_op = &ufs_super_ops; 1138 sb->s_export_op = &ufs_export_ops; 1139 1140 sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic); 1141 1142 uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno); 1143 uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno); 1144 uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno); 1145 uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno); 1146 uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset); 1147 uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask); 1148 1149 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { 1150 uspi->s_u2_size = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size); 1151 uspi->s_u2_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize); 1152 } else { 1153 uspi->s_size = fs32_to_cpu(sb, usb1->fs_size); 1154 uspi->s_dsize = fs32_to_cpu(sb, usb1->fs_dsize); 1155 } 1156 1157 uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg); 1158 /* s_bsize already set */ 1159 /* s_fsize already set */ 1160 uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag); 1161 uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree); 1162 uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask); 1163 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask); 1164 uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift); 1165 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift); 1166 UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift, 1167 uspi->s_fshift); 1168 uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift); 1169 uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb); 1170 /* s_sbsize already set */ 1171 uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask); 1172 uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift); 1173 uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir); 1174 uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb); 1175 uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf); 1176 uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3); 1177 uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave); 1178 uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew); 1179 1180 if (uspi->fs_magic == UFS2_MAGIC) 1181 uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr); 1182 else 1183 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr); 1184 1185 uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize); 1186 uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize); 1187 uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak); 1188 uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect); 1189 uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc); 1190 uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg); 1191 uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg); 1192 uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc); 1193 uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize); 1194 uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3); 1195 uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3); 1196 uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos); 1197 uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff); 1198 uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff); 1199 1200 /* 1201 * Compute another frequently used values 1202 */ 1203 uspi->s_fpbmask = uspi->s_fpb - 1; 1204 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) 1205 uspi->s_apbshift = uspi->s_bshift - 3; 1206 else 1207 uspi->s_apbshift = uspi->s_bshift - 2; 1208 1209 uspi->s_2apbshift = uspi->s_apbshift * 2; 1210 uspi->s_3apbshift = uspi->s_apbshift * 3; 1211 uspi->s_apb = 1 << uspi->s_apbshift; 1212 uspi->s_2apb = 1 << uspi->s_2apbshift; 1213 uspi->s_3apb = 1 << uspi->s_3apbshift; 1214 uspi->s_apbmask = uspi->s_apb - 1; 1215 uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS; 1216 uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift; 1217 uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift; 1218 uspi->s_bpf = uspi->s_fsize << 3; 1219 uspi->s_bpfshift = uspi->s_fshift + 3; 1220 uspi->s_bpfmask = uspi->s_bpf - 1; 1221 if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_44BSD || 1222 (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_UFS2) 1223 uspi->s_maxsymlinklen = 1224 fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen); 1225 1226 if (uspi->fs_magic == UFS2_MAGIC) 1227 maxsymlen = 2 * 4 * (UFS_NDADDR + UFS_NINDIR); 1228 else 1229 maxsymlen = 4 * (UFS_NDADDR + UFS_NINDIR); 1230 if (uspi->s_maxsymlinklen > maxsymlen) { 1231 ufs_warning(sb, __func__, "ufs_read_super: excessive maximum " 1232 "fast symlink size (%u)\n", uspi->s_maxsymlinklen); 1233 uspi->s_maxsymlinklen = maxsymlen; 1234 } 1235 sb->s_max_links = UFS_LINK_MAX; 1236 1237 inode = ufs_iget(sb, UFS_ROOTINO); 1238 if (IS_ERR(inode)) { 1239 ret = PTR_ERR(inode); 1240 goto failed; 1241 } 1242 sb->s_root = d_make_root(inode); 1243 if (!sb->s_root) { 1244 ret = -ENOMEM; 1245 goto failed; 1246 } 1247 1248 ufs_setup_cstotal(sb); 1249 /* 1250 * Read cylinder group structures 1251 */ 1252 if (!(sb->s_flags & MS_RDONLY)) 1253 if (!ufs_read_cylinder_structures(sb)) 1254 goto failed; 1255 1256 UFSD("EXIT\n"); 1257 return 0; 1258 1259 failed: 1260 mutex_destroy(&sbi->mutex); 1261 if (ubh) 1262 ubh_brelse_uspi (uspi); 1263 kfree (uspi); 1264 kfree(sbi); 1265 sb->s_fs_info = NULL; 1266 UFSD("EXIT (FAILED)\n"); 1267 return ret; 1268 1269 failed_nomem: 1270 UFSD("EXIT (NOMEM)\n"); 1271 return -ENOMEM; 1272 } 1273 1274 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data) 1275 { 1276 struct ufs_sb_private_info * uspi; 1277 struct ufs_super_block_first * usb1; 1278 struct ufs_super_block_third * usb3; 1279 unsigned new_mount_opt, ufstype; 1280 unsigned flags; 1281 1282 sync_filesystem(sb); 1283 lock_ufs(sb); 1284 uspi = UFS_SB(sb)->s_uspi; 1285 flags = UFS_SB(sb)->s_flags; 1286 usb1 = ubh_get_usb_first(uspi); 1287 usb3 = ubh_get_usb_third(uspi); 1288 1289 /* 1290 * Allow the "check" option to be passed as a remount option. 1291 * It is not possible to change ufstype option during remount 1292 */ 1293 ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE; 1294 new_mount_opt = 0; 1295 ufs_set_opt (new_mount_opt, ONERROR_LOCK); 1296 if (!ufs_parse_options (data, &new_mount_opt)) { 1297 unlock_ufs(sb); 1298 return -EINVAL; 1299 } 1300 if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) { 1301 new_mount_opt |= ufstype; 1302 } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) { 1303 pr_err("ufstype can't be changed during remount\n"); 1304 unlock_ufs(sb); 1305 return -EINVAL; 1306 } 1307 1308 if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) { 1309 UFS_SB(sb)->s_mount_opt = new_mount_opt; 1310 unlock_ufs(sb); 1311 return 0; 1312 } 1313 1314 /* 1315 * fs was mouted as rw, remounting ro 1316 */ 1317 if (*mount_flags & MS_RDONLY) { 1318 ufs_put_super_internal(sb); 1319 usb1->fs_time = cpu_to_fs32(sb, get_seconds()); 1320 if ((flags & UFS_ST_MASK) == UFS_ST_SUN 1321 || (flags & UFS_ST_MASK) == UFS_ST_SUNOS 1322 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86) 1323 ufs_set_fs_state(sb, usb1, usb3, 1324 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time)); 1325 ubh_mark_buffer_dirty (USPI_UBH(uspi)); 1326 sb->s_flags |= MS_RDONLY; 1327 } else { 1328 /* 1329 * fs was mounted as ro, remounting rw 1330 */ 1331 #ifndef CONFIG_UFS_FS_WRITE 1332 pr_err("ufs was compiled with read-only support, can't be mounted as read-write\n"); 1333 unlock_ufs(sb); 1334 return -EINVAL; 1335 #else 1336 if (ufstype != UFS_MOUNT_UFSTYPE_SUN && 1337 ufstype != UFS_MOUNT_UFSTYPE_SUNOS && 1338 ufstype != UFS_MOUNT_UFSTYPE_44BSD && 1339 ufstype != UFS_MOUNT_UFSTYPE_SUNx86 && 1340 ufstype != UFS_MOUNT_UFSTYPE_UFS2) { 1341 pr_err("this ufstype is read-only supported\n"); 1342 unlock_ufs(sb); 1343 return -EINVAL; 1344 } 1345 if (!ufs_read_cylinder_structures(sb)) { 1346 pr_err("failed during remounting\n"); 1347 unlock_ufs(sb); 1348 return -EPERM; 1349 } 1350 sb->s_flags &= ~MS_RDONLY; 1351 #endif 1352 } 1353 UFS_SB(sb)->s_mount_opt = new_mount_opt; 1354 unlock_ufs(sb); 1355 return 0; 1356 } 1357 1358 static int ufs_show_options(struct seq_file *seq, struct dentry *root) 1359 { 1360 struct ufs_sb_info *sbi = UFS_SB(root->d_sb); 1361 unsigned mval = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE; 1362 const struct match_token *tp = tokens; 1363 1364 while (tp->token != Opt_onerror_panic && tp->token != mval) 1365 ++tp; 1366 BUG_ON(tp->token == Opt_onerror_panic); 1367 seq_printf(seq, ",%s", tp->pattern); 1368 1369 mval = sbi->s_mount_opt & UFS_MOUNT_ONERROR; 1370 while (tp->token != Opt_err && tp->token != mval) 1371 ++tp; 1372 BUG_ON(tp->token == Opt_err); 1373 seq_printf(seq, ",%s", tp->pattern); 1374 1375 return 0; 1376 } 1377 1378 static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf) 1379 { 1380 struct super_block *sb = dentry->d_sb; 1381 struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi; 1382 unsigned flags = UFS_SB(sb)->s_flags; 1383 struct ufs_super_block_third *usb3; 1384 u64 id = huge_encode_dev(sb->s_bdev->bd_dev); 1385 1386 lock_ufs(sb); 1387 1388 usb3 = ubh_get_usb_third(uspi); 1389 1390 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { 1391 buf->f_type = UFS2_MAGIC; 1392 buf->f_blocks = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize); 1393 } else { 1394 buf->f_type = UFS_MAGIC; 1395 buf->f_blocks = uspi->s_dsize; 1396 } 1397 buf->f_bfree = ufs_blkstofrags(uspi->cs_total.cs_nbfree) + 1398 uspi->cs_total.cs_nffree; 1399 buf->f_ffree = uspi->cs_total.cs_nifree; 1400 buf->f_bsize = sb->s_blocksize; 1401 buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree)) 1402 ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0; 1403 buf->f_files = uspi->s_ncg * uspi->s_ipg; 1404 buf->f_namelen = UFS_MAXNAMLEN; 1405 buf->f_fsid.val[0] = (u32)id; 1406 buf->f_fsid.val[1] = (u32)(id >> 32); 1407 1408 unlock_ufs(sb); 1409 1410 return 0; 1411 } 1412 1413 static struct kmem_cache * ufs_inode_cachep; 1414 1415 static struct inode *ufs_alloc_inode(struct super_block *sb) 1416 { 1417 struct ufs_inode_info *ei; 1418 ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, GFP_NOFS); 1419 if (!ei) 1420 return NULL; 1421 ei->vfs_inode.i_version = 1; 1422 return &ei->vfs_inode; 1423 } 1424 1425 static void ufs_i_callback(struct rcu_head *head) 1426 { 1427 struct inode *inode = container_of(head, struct inode, i_rcu); 1428 kmem_cache_free(ufs_inode_cachep, UFS_I(inode)); 1429 } 1430 1431 static void ufs_destroy_inode(struct inode *inode) 1432 { 1433 call_rcu(&inode->i_rcu, ufs_i_callback); 1434 } 1435 1436 static void init_once(void *foo) 1437 { 1438 struct ufs_inode_info *ei = (struct ufs_inode_info *) foo; 1439 1440 inode_init_once(&ei->vfs_inode); 1441 } 1442 1443 static int __init init_inodecache(void) 1444 { 1445 ufs_inode_cachep = kmem_cache_create("ufs_inode_cache", 1446 sizeof(struct ufs_inode_info), 1447 0, (SLAB_RECLAIM_ACCOUNT| 1448 SLAB_MEM_SPREAD), 1449 init_once); 1450 if (ufs_inode_cachep == NULL) 1451 return -ENOMEM; 1452 return 0; 1453 } 1454 1455 static void destroy_inodecache(void) 1456 { 1457 /* 1458 * Make sure all delayed rcu free inodes are flushed before we 1459 * destroy cache. 1460 */ 1461 rcu_barrier(); 1462 kmem_cache_destroy(ufs_inode_cachep); 1463 } 1464 1465 static const struct super_operations ufs_super_ops = { 1466 .alloc_inode = ufs_alloc_inode, 1467 .destroy_inode = ufs_destroy_inode, 1468 .write_inode = ufs_write_inode, 1469 .evict_inode = ufs_evict_inode, 1470 .put_super = ufs_put_super, 1471 .sync_fs = ufs_sync_fs, 1472 .statfs = ufs_statfs, 1473 .remount_fs = ufs_remount, 1474 .show_options = ufs_show_options, 1475 }; 1476 1477 static struct dentry *ufs_mount(struct file_system_type *fs_type, 1478 int flags, const char *dev_name, void *data) 1479 { 1480 return mount_bdev(fs_type, flags, dev_name, data, ufs_fill_super); 1481 } 1482 1483 static struct file_system_type ufs_fs_type = { 1484 .owner = THIS_MODULE, 1485 .name = "ufs", 1486 .mount = ufs_mount, 1487 .kill_sb = kill_block_super, 1488 .fs_flags = FS_REQUIRES_DEV, 1489 }; 1490 MODULE_ALIAS_FS("ufs"); 1491 1492 static int __init init_ufs_fs(void) 1493 { 1494 int err = init_inodecache(); 1495 if (err) 1496 goto out1; 1497 err = register_filesystem(&ufs_fs_type); 1498 if (err) 1499 goto out; 1500 return 0; 1501 out: 1502 destroy_inodecache(); 1503 out1: 1504 return err; 1505 } 1506 1507 static void __exit exit_ufs_fs(void) 1508 { 1509 unregister_filesystem(&ufs_fs_type); 1510 destroy_inodecache(); 1511 } 1512 1513 module_init(init_ufs_fs) 1514 module_exit(exit_ufs_fs) 1515 MODULE_LICENSE("GPL"); 1516