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