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