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 mutex_lock(&UFS_SB(sb)->s_lock); 699 700 UFSD("ENTER\n"); 701 702 flags = UFS_SB(sb)->s_flags; 703 uspi = UFS_SB(sb)->s_uspi; 704 usb1 = ubh_get_usb_first(uspi); 705 usb3 = ubh_get_usb_third(uspi); 706 707 usb1->fs_time = cpu_to_fs32(sb, get_seconds()); 708 if ((flags & UFS_ST_MASK) == UFS_ST_SUN || 709 (flags & UFS_ST_MASK) == UFS_ST_SUNOS || 710 (flags & UFS_ST_MASK) == UFS_ST_SUNx86) 711 ufs_set_fs_state(sb, usb1, usb3, 712 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time)); 713 ufs_put_cstotal(sb); 714 715 UFSD("EXIT\n"); 716 mutex_unlock(&UFS_SB(sb)->s_lock); 717 unlock_ufs(sb); 718 719 return 0; 720 } 721 722 static void delayed_sync_fs(struct work_struct *work) 723 { 724 struct ufs_sb_info *sbi; 725 726 sbi = container_of(work, struct ufs_sb_info, sync_work.work); 727 728 spin_lock(&sbi->work_lock); 729 sbi->work_queued = 0; 730 spin_unlock(&sbi->work_lock); 731 732 ufs_sync_fs(sbi->sb, 1); 733 } 734 735 void ufs_mark_sb_dirty(struct super_block *sb) 736 { 737 struct ufs_sb_info *sbi = UFS_SB(sb); 738 unsigned long delay; 739 740 spin_lock(&sbi->work_lock); 741 if (!sbi->work_queued) { 742 delay = msecs_to_jiffies(dirty_writeback_interval * 10); 743 queue_delayed_work(system_long_wq, &sbi->sync_work, delay); 744 sbi->work_queued = 1; 745 } 746 spin_unlock(&sbi->work_lock); 747 } 748 749 static void ufs_put_super(struct super_block *sb) 750 { 751 struct ufs_sb_info * sbi = UFS_SB(sb); 752 753 UFSD("ENTER\n"); 754 755 if (!(sb->s_flags & MS_RDONLY)) 756 ufs_put_super_internal(sb); 757 cancel_delayed_work_sync(&sbi->sync_work); 758 759 ubh_brelse_uspi (sbi->s_uspi); 760 kfree (sbi->s_uspi); 761 mutex_destroy(&sbi->mutex); 762 kfree (sbi); 763 sb->s_fs_info = NULL; 764 UFSD("EXIT\n"); 765 return; 766 } 767 768 static int ufs_fill_super(struct super_block *sb, void *data, int silent) 769 { 770 struct ufs_sb_info * sbi; 771 struct ufs_sb_private_info * uspi; 772 struct ufs_super_block_first * usb1; 773 struct ufs_super_block_second * usb2; 774 struct ufs_super_block_third * usb3; 775 struct ufs_buffer_head * ubh; 776 struct inode *inode; 777 unsigned block_size, super_block_size; 778 unsigned flags; 779 unsigned super_block_offset; 780 unsigned maxsymlen; 781 int ret = -EINVAL; 782 783 uspi = NULL; 784 ubh = NULL; 785 flags = 0; 786 787 UFSD("ENTER\n"); 788 789 #ifndef CONFIG_UFS_FS_WRITE 790 if (!(sb->s_flags & MS_RDONLY)) { 791 pr_err("ufs was compiled with read-only support, can't be mounted as read-write\n"); 792 return -EROFS; 793 } 794 #endif 795 796 sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL); 797 if (!sbi) 798 goto failed_nomem; 799 sb->s_fs_info = sbi; 800 sbi->sb = sb; 801 802 UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY)); 803 804 mutex_init(&sbi->mutex); 805 mutex_init(&sbi->s_lock); 806 spin_lock_init(&sbi->work_lock); 807 INIT_DELAYED_WORK(&sbi->sync_work, delayed_sync_fs); 808 /* 809 * Set default mount options 810 * Parse mount options 811 */ 812 sbi->s_mount_opt = 0; 813 ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK); 814 if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) { 815 pr_err("wrong mount options\n"); 816 goto failed; 817 } 818 if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) { 819 if (!silent) 820 pr_err("You didn't specify the type of your ufs filesystem\n\n" 821 "mount -t ufs -o ufstype=" 822 "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n" 823 ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, " 824 "default is ufstype=old\n"); 825 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD); 826 } 827 828 uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL); 829 sbi->s_uspi = uspi; 830 if (!uspi) 831 goto failed; 832 uspi->s_dirblksize = UFS_SECTOR_SIZE; 833 super_block_offset=UFS_SBLOCK; 834 835 /* Keep 2Gig file limit. Some UFS variants need to override 836 this but as I don't know which I'll let those in the know loosen 837 the rules */ 838 switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) { 839 case UFS_MOUNT_UFSTYPE_44BSD: 840 UFSD("ufstype=44bsd\n"); 841 uspi->s_fsize = block_size = 512; 842 uspi->s_fmask = ~(512 - 1); 843 uspi->s_fshift = 9; 844 uspi->s_sbsize = super_block_size = 1536; 845 uspi->s_sbbase = 0; 846 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; 847 break; 848 case UFS_MOUNT_UFSTYPE_UFS2: 849 UFSD("ufstype=ufs2\n"); 850 super_block_offset=SBLOCK_UFS2; 851 uspi->s_fsize = block_size = 512; 852 uspi->s_fmask = ~(512 - 1); 853 uspi->s_fshift = 9; 854 uspi->s_sbsize = super_block_size = 1536; 855 uspi->s_sbbase = 0; 856 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; 857 break; 858 859 case UFS_MOUNT_UFSTYPE_SUN: 860 UFSD("ufstype=sun\n"); 861 uspi->s_fsize = block_size = 1024; 862 uspi->s_fmask = ~(1024 - 1); 863 uspi->s_fshift = 10; 864 uspi->s_sbsize = super_block_size = 2048; 865 uspi->s_sbbase = 0; 866 uspi->s_maxsymlinklen = 0; /* Not supported on disk */ 867 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN; 868 break; 869 870 case UFS_MOUNT_UFSTYPE_SUNOS: 871 UFSD("ufstype=sunos\n"); 872 uspi->s_fsize = block_size = 1024; 873 uspi->s_fmask = ~(1024 - 1); 874 uspi->s_fshift = 10; 875 uspi->s_sbsize = 2048; 876 super_block_size = 2048; 877 uspi->s_sbbase = 0; 878 uspi->s_maxsymlinklen = 0; /* Not supported on disk */ 879 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_SUNOS | UFS_CG_SUN; 880 break; 881 882 case UFS_MOUNT_UFSTYPE_SUNx86: 883 UFSD("ufstype=sunx86\n"); 884 uspi->s_fsize = block_size = 1024; 885 uspi->s_fmask = ~(1024 - 1); 886 uspi->s_fshift = 10; 887 uspi->s_sbsize = super_block_size = 2048; 888 uspi->s_sbbase = 0; 889 uspi->s_maxsymlinklen = 0; /* Not supported on disk */ 890 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN; 891 break; 892 893 case UFS_MOUNT_UFSTYPE_OLD: 894 UFSD("ufstype=old\n"); 895 uspi->s_fsize = block_size = 1024; 896 uspi->s_fmask = ~(1024 - 1); 897 uspi->s_fshift = 10; 898 uspi->s_sbsize = super_block_size = 2048; 899 uspi->s_sbbase = 0; 900 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 901 if (!(sb->s_flags & MS_RDONLY)) { 902 if (!silent) 903 pr_info("ufstype=old is supported read-only\n"); 904 sb->s_flags |= MS_RDONLY; 905 } 906 break; 907 908 case UFS_MOUNT_UFSTYPE_NEXTSTEP: 909 UFSD("ufstype=nextstep\n"); 910 uspi->s_fsize = block_size = 1024; 911 uspi->s_fmask = ~(1024 - 1); 912 uspi->s_fshift = 10; 913 uspi->s_sbsize = super_block_size = 2048; 914 uspi->s_sbbase = 0; 915 uspi->s_dirblksize = 1024; 916 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 917 if (!(sb->s_flags & MS_RDONLY)) { 918 if (!silent) 919 pr_info("ufstype=nextstep is supported read-only\n"); 920 sb->s_flags |= MS_RDONLY; 921 } 922 break; 923 924 case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD: 925 UFSD("ufstype=nextstep-cd\n"); 926 uspi->s_fsize = block_size = 2048; 927 uspi->s_fmask = ~(2048 - 1); 928 uspi->s_fshift = 11; 929 uspi->s_sbsize = super_block_size = 2048; 930 uspi->s_sbbase = 0; 931 uspi->s_dirblksize = 1024; 932 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 933 if (!(sb->s_flags & MS_RDONLY)) { 934 if (!silent) 935 pr_info("ufstype=nextstep-cd is supported read-only\n"); 936 sb->s_flags |= MS_RDONLY; 937 } 938 break; 939 940 case UFS_MOUNT_UFSTYPE_OPENSTEP: 941 UFSD("ufstype=openstep\n"); 942 uspi->s_fsize = block_size = 1024; 943 uspi->s_fmask = ~(1024 - 1); 944 uspi->s_fshift = 10; 945 uspi->s_sbsize = super_block_size = 2048; 946 uspi->s_sbbase = 0; 947 uspi->s_dirblksize = 1024; 948 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; 949 if (!(sb->s_flags & MS_RDONLY)) { 950 if (!silent) 951 pr_info("ufstype=openstep is supported read-only\n"); 952 sb->s_flags |= MS_RDONLY; 953 } 954 break; 955 956 case UFS_MOUNT_UFSTYPE_HP: 957 UFSD("ufstype=hp\n"); 958 uspi->s_fsize = block_size = 1024; 959 uspi->s_fmask = ~(1024 - 1); 960 uspi->s_fshift = 10; 961 uspi->s_sbsize = super_block_size = 2048; 962 uspi->s_sbbase = 0; 963 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 964 if (!(sb->s_flags & MS_RDONLY)) { 965 if (!silent) 966 pr_info("ufstype=hp is supported read-only\n"); 967 sb->s_flags |= MS_RDONLY; 968 } 969 break; 970 default: 971 if (!silent) 972 pr_err("unknown ufstype\n"); 973 goto failed; 974 } 975 976 again: 977 if (!sb_set_blocksize(sb, block_size)) { 978 pr_err("failed to set blocksize\n"); 979 goto failed; 980 } 981 982 /* 983 * read ufs super block from device 984 */ 985 986 ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size); 987 988 if (!ubh) 989 goto failed; 990 991 usb1 = ubh_get_usb_first(uspi); 992 usb2 = ubh_get_usb_second(uspi); 993 usb3 = ubh_get_usb_third(uspi); 994 995 /* Sort out mod used on SunOS 4.1.3 for fs_state */ 996 uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat); 997 if (((flags & UFS_ST_MASK) == UFS_ST_SUNOS) && 998 (uspi->s_postblformat != UFS_42POSTBLFMT)) { 999 flags &= ~UFS_ST_MASK; 1000 flags |= UFS_ST_SUN; 1001 } 1002 1003 /* 1004 * Check ufs magic number 1005 */ 1006 sbi->s_bytesex = BYTESEX_LE; 1007 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) { 1008 case UFS_MAGIC: 1009 case UFS_MAGIC_BW: 1010 case UFS2_MAGIC: 1011 case UFS_MAGIC_LFN: 1012 case UFS_MAGIC_FEA: 1013 case UFS_MAGIC_4GB: 1014 goto magic_found; 1015 } 1016 sbi->s_bytesex = BYTESEX_BE; 1017 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) { 1018 case UFS_MAGIC: 1019 case UFS_MAGIC_BW: 1020 case UFS2_MAGIC: 1021 case UFS_MAGIC_LFN: 1022 case UFS_MAGIC_FEA: 1023 case UFS_MAGIC_4GB: 1024 goto magic_found; 1025 } 1026 1027 if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP) 1028 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD) 1029 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP)) 1030 && uspi->s_sbbase < 256) { 1031 ubh_brelse_uspi(uspi); 1032 ubh = NULL; 1033 uspi->s_sbbase += 8; 1034 goto again; 1035 } 1036 if (!silent) 1037 pr_err("%s(): bad magic number\n", __func__); 1038 goto failed; 1039 1040 magic_found: 1041 /* 1042 * Check block and fragment sizes 1043 */ 1044 uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize); 1045 uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize); 1046 uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize); 1047 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask); 1048 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift); 1049 1050 if (!is_power_of_2(uspi->s_fsize)) { 1051 pr_err("%s(): fragment size %u is not a power of 2\n", 1052 __func__, uspi->s_fsize); 1053 goto failed; 1054 } 1055 if (uspi->s_fsize < 512) { 1056 pr_err("%s(): fragment size %u is too small\n", 1057 __func__, uspi->s_fsize); 1058 goto failed; 1059 } 1060 if (uspi->s_fsize > 4096) { 1061 pr_err("%s(): fragment size %u is too large\n", 1062 __func__, uspi->s_fsize); 1063 goto failed; 1064 } 1065 if (!is_power_of_2(uspi->s_bsize)) { 1066 pr_err("%s(): block size %u is not a power of 2\n", 1067 __func__, uspi->s_bsize); 1068 goto failed; 1069 } 1070 if (uspi->s_bsize < 4096) { 1071 pr_err("%s(): block size %u is too small\n", 1072 __func__, uspi->s_bsize); 1073 goto failed; 1074 } 1075 if (uspi->s_bsize / uspi->s_fsize > 8) { 1076 pr_err("%s(): too many fragments per block (%u)\n", 1077 __func__, uspi->s_bsize / uspi->s_fsize); 1078 goto failed; 1079 } 1080 if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) { 1081 ubh_brelse_uspi(uspi); 1082 ubh = NULL; 1083 block_size = uspi->s_fsize; 1084 super_block_size = uspi->s_sbsize; 1085 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size); 1086 goto again; 1087 } 1088 1089 sbi->s_flags = flags;/*after that line some functions use s_flags*/ 1090 ufs_print_super_stuff(sb, usb1, usb2, usb3); 1091 1092 /* 1093 * Check, if file system was correctly unmounted. 1094 * If not, make it read only. 1095 */ 1096 if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) || 1097 ((flags & UFS_ST_MASK) == UFS_ST_OLD) || 1098 (((flags & UFS_ST_MASK) == UFS_ST_SUN || 1099 (flags & UFS_ST_MASK) == UFS_ST_SUNOS || 1100 (flags & UFS_ST_MASK) == UFS_ST_SUNx86) && 1101 (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) { 1102 switch(usb1->fs_clean) { 1103 case UFS_FSCLEAN: 1104 UFSD("fs is clean\n"); 1105 break; 1106 case UFS_FSSTABLE: 1107 UFSD("fs is stable\n"); 1108 break; 1109 case UFS_FSLOG: 1110 UFSD("fs is logging fs\n"); 1111 break; 1112 case UFS_FSOSF1: 1113 UFSD("fs is DEC OSF/1\n"); 1114 break; 1115 case UFS_FSACTIVE: 1116 pr_err("%s(): fs is active\n", __func__); 1117 sb->s_flags |= MS_RDONLY; 1118 break; 1119 case UFS_FSBAD: 1120 pr_err("%s(): fs is bad\n", __func__); 1121 sb->s_flags |= MS_RDONLY; 1122 break; 1123 default: 1124 pr_err("%s(): can't grok fs_clean 0x%x\n", 1125 __func__, usb1->fs_clean); 1126 sb->s_flags |= MS_RDONLY; 1127 break; 1128 } 1129 } else { 1130 pr_err("%s(): fs needs fsck\n", __func__); 1131 sb->s_flags |= MS_RDONLY; 1132 } 1133 1134 /* 1135 * Read ufs_super_block into internal data structures 1136 */ 1137 sb->s_op = &ufs_super_ops; 1138 sb->s_export_op = &ufs_export_ops; 1139 1140 sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic); 1141 1142 uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno); 1143 uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno); 1144 uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno); 1145 uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno); 1146 uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset); 1147 uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask); 1148 1149 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { 1150 uspi->s_u2_size = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size); 1151 uspi->s_u2_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize); 1152 } else { 1153 uspi->s_size = fs32_to_cpu(sb, usb1->fs_size); 1154 uspi->s_dsize = fs32_to_cpu(sb, usb1->fs_dsize); 1155 } 1156 1157 uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg); 1158 /* s_bsize already set */ 1159 /* s_fsize already set */ 1160 uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag); 1161 uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree); 1162 uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask); 1163 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask); 1164 uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift); 1165 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift); 1166 UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift, 1167 uspi->s_fshift); 1168 uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift); 1169 uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb); 1170 /* s_sbsize already set */ 1171 uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask); 1172 uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift); 1173 uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir); 1174 uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb); 1175 uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf); 1176 uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3); 1177 uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave); 1178 uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew); 1179 1180 if (uspi->fs_magic == UFS2_MAGIC) 1181 uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr); 1182 else 1183 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr); 1184 1185 uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize); 1186 uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize); 1187 uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak); 1188 uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect); 1189 uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc); 1190 uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg); 1191 uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg); 1192 uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc); 1193 uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize); 1194 uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3); 1195 uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3); 1196 uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos); 1197 uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff); 1198 uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff); 1199 1200 /* 1201 * Compute another frequently used values 1202 */ 1203 uspi->s_fpbmask = uspi->s_fpb - 1; 1204 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) 1205 uspi->s_apbshift = uspi->s_bshift - 3; 1206 else 1207 uspi->s_apbshift = uspi->s_bshift - 2; 1208 1209 uspi->s_2apbshift = uspi->s_apbshift * 2; 1210 uspi->s_3apbshift = uspi->s_apbshift * 3; 1211 uspi->s_apb = 1 << uspi->s_apbshift; 1212 uspi->s_2apb = 1 << uspi->s_2apbshift; 1213 uspi->s_3apb = 1 << uspi->s_3apbshift; 1214 uspi->s_apbmask = uspi->s_apb - 1; 1215 uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS; 1216 uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift; 1217 uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift; 1218 uspi->s_bpf = uspi->s_fsize << 3; 1219 uspi->s_bpfshift = uspi->s_fshift + 3; 1220 uspi->s_bpfmask = uspi->s_bpf - 1; 1221 if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_44BSD || 1222 (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_UFS2) 1223 uspi->s_maxsymlinklen = 1224 fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen); 1225 1226 if (uspi->fs_magic == UFS2_MAGIC) 1227 maxsymlen = 2 * 4 * (UFS_NDADDR + UFS_NINDIR); 1228 else 1229 maxsymlen = 4 * (UFS_NDADDR + UFS_NINDIR); 1230 if (uspi->s_maxsymlinklen > maxsymlen) { 1231 ufs_warning(sb, __func__, "ufs_read_super: excessive maximum " 1232 "fast symlink size (%u)\n", uspi->s_maxsymlinklen); 1233 uspi->s_maxsymlinklen = maxsymlen; 1234 } 1235 sb->s_max_links = UFS_LINK_MAX; 1236 1237 inode = ufs_iget(sb, UFS_ROOTINO); 1238 if (IS_ERR(inode)) { 1239 ret = PTR_ERR(inode); 1240 goto failed; 1241 } 1242 sb->s_root = d_make_root(inode); 1243 if (!sb->s_root) { 1244 ret = -ENOMEM; 1245 goto failed; 1246 } 1247 1248 ufs_setup_cstotal(sb); 1249 /* 1250 * Read cylinder group structures 1251 */ 1252 if (!(sb->s_flags & MS_RDONLY)) 1253 if (!ufs_read_cylinder_structures(sb)) 1254 goto failed; 1255 1256 UFSD("EXIT\n"); 1257 return 0; 1258 1259 failed: 1260 mutex_destroy(&sbi->mutex); 1261 if (ubh) 1262 ubh_brelse_uspi (uspi); 1263 kfree (uspi); 1264 kfree(sbi); 1265 sb->s_fs_info = NULL; 1266 UFSD("EXIT (FAILED)\n"); 1267 return ret; 1268 1269 failed_nomem: 1270 UFSD("EXIT (NOMEM)\n"); 1271 return -ENOMEM; 1272 } 1273 1274 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data) 1275 { 1276 struct ufs_sb_private_info * uspi; 1277 struct ufs_super_block_first * usb1; 1278 struct ufs_super_block_third * usb3; 1279 unsigned new_mount_opt, ufstype; 1280 unsigned flags; 1281 1282 sync_filesystem(sb); 1283 lock_ufs(sb); 1284 mutex_lock(&UFS_SB(sb)->s_lock); 1285 uspi = UFS_SB(sb)->s_uspi; 1286 flags = UFS_SB(sb)->s_flags; 1287 usb1 = ubh_get_usb_first(uspi); 1288 usb3 = ubh_get_usb_third(uspi); 1289 1290 /* 1291 * Allow the "check" option to be passed as a remount option. 1292 * It is not possible to change ufstype option during remount 1293 */ 1294 ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE; 1295 new_mount_opt = 0; 1296 ufs_set_opt (new_mount_opt, ONERROR_LOCK); 1297 if (!ufs_parse_options (data, &new_mount_opt)) { 1298 mutex_unlock(&UFS_SB(sb)->s_lock); 1299 unlock_ufs(sb); 1300 return -EINVAL; 1301 } 1302 if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) { 1303 new_mount_opt |= ufstype; 1304 } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) { 1305 pr_err("ufstype can't be changed during remount\n"); 1306 mutex_unlock(&UFS_SB(sb)->s_lock); 1307 unlock_ufs(sb); 1308 return -EINVAL; 1309 } 1310 1311 if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) { 1312 UFS_SB(sb)->s_mount_opt = new_mount_opt; 1313 mutex_unlock(&UFS_SB(sb)->s_lock); 1314 unlock_ufs(sb); 1315 return 0; 1316 } 1317 1318 /* 1319 * fs was mouted as rw, remounting ro 1320 */ 1321 if (*mount_flags & MS_RDONLY) { 1322 ufs_put_super_internal(sb); 1323 usb1->fs_time = cpu_to_fs32(sb, get_seconds()); 1324 if ((flags & UFS_ST_MASK) == UFS_ST_SUN 1325 || (flags & UFS_ST_MASK) == UFS_ST_SUNOS 1326 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86) 1327 ufs_set_fs_state(sb, usb1, usb3, 1328 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time)); 1329 ubh_mark_buffer_dirty (USPI_UBH(uspi)); 1330 sb->s_flags |= MS_RDONLY; 1331 } else { 1332 /* 1333 * fs was mounted as ro, remounting rw 1334 */ 1335 #ifndef CONFIG_UFS_FS_WRITE 1336 pr_err("ufs was compiled with read-only support, can't be mounted as read-write\n"); 1337 mutex_unlock(&UFS_SB(sb)->s_lock); 1338 unlock_ufs(sb); 1339 return -EINVAL; 1340 #else 1341 if (ufstype != UFS_MOUNT_UFSTYPE_SUN && 1342 ufstype != UFS_MOUNT_UFSTYPE_SUNOS && 1343 ufstype != UFS_MOUNT_UFSTYPE_44BSD && 1344 ufstype != UFS_MOUNT_UFSTYPE_SUNx86 && 1345 ufstype != UFS_MOUNT_UFSTYPE_UFS2) { 1346 pr_err("this ufstype is read-only supported\n"); 1347 mutex_unlock(&UFS_SB(sb)->s_lock); 1348 unlock_ufs(sb); 1349 return -EINVAL; 1350 } 1351 if (!ufs_read_cylinder_structures(sb)) { 1352 pr_err("failed during remounting\n"); 1353 mutex_unlock(&UFS_SB(sb)->s_lock); 1354 unlock_ufs(sb); 1355 return -EPERM; 1356 } 1357 sb->s_flags &= ~MS_RDONLY; 1358 #endif 1359 } 1360 UFS_SB(sb)->s_mount_opt = new_mount_opt; 1361 mutex_unlock(&UFS_SB(sb)->s_lock); 1362 unlock_ufs(sb); 1363 return 0; 1364 } 1365 1366 static int ufs_show_options(struct seq_file *seq, struct dentry *root) 1367 { 1368 struct ufs_sb_info *sbi = UFS_SB(root->d_sb); 1369 unsigned mval = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE; 1370 const struct match_token *tp = tokens; 1371 1372 while (tp->token != Opt_onerror_panic && tp->token != mval) 1373 ++tp; 1374 BUG_ON(tp->token == Opt_onerror_panic); 1375 seq_printf(seq, ",%s", tp->pattern); 1376 1377 mval = sbi->s_mount_opt & UFS_MOUNT_ONERROR; 1378 while (tp->token != Opt_err && tp->token != mval) 1379 ++tp; 1380 BUG_ON(tp->token == Opt_err); 1381 seq_printf(seq, ",%s", tp->pattern); 1382 1383 return 0; 1384 } 1385 1386 static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf) 1387 { 1388 struct super_block *sb = dentry->d_sb; 1389 struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi; 1390 unsigned flags = UFS_SB(sb)->s_flags; 1391 struct ufs_super_block_third *usb3; 1392 u64 id = huge_encode_dev(sb->s_bdev->bd_dev); 1393 1394 lock_ufs(sb); 1395 1396 usb3 = ubh_get_usb_third(uspi); 1397 1398 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { 1399 buf->f_type = UFS2_MAGIC; 1400 buf->f_blocks = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize); 1401 } else { 1402 buf->f_type = UFS_MAGIC; 1403 buf->f_blocks = uspi->s_dsize; 1404 } 1405 buf->f_bfree = ufs_blkstofrags(uspi->cs_total.cs_nbfree) + 1406 uspi->cs_total.cs_nffree; 1407 buf->f_ffree = uspi->cs_total.cs_nifree; 1408 buf->f_bsize = sb->s_blocksize; 1409 buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree)) 1410 ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0; 1411 buf->f_files = uspi->s_ncg * uspi->s_ipg; 1412 buf->f_namelen = UFS_MAXNAMLEN; 1413 buf->f_fsid.val[0] = (u32)id; 1414 buf->f_fsid.val[1] = (u32)(id >> 32); 1415 1416 unlock_ufs(sb); 1417 1418 return 0; 1419 } 1420 1421 static struct kmem_cache * ufs_inode_cachep; 1422 1423 static struct inode *ufs_alloc_inode(struct super_block *sb) 1424 { 1425 struct ufs_inode_info *ei; 1426 1427 ei = kmem_cache_alloc(ufs_inode_cachep, GFP_NOFS); 1428 if (!ei) 1429 return NULL; 1430 1431 ei->vfs_inode.i_version = 1; 1432 return &ei->vfs_inode; 1433 } 1434 1435 static void ufs_i_callback(struct rcu_head *head) 1436 { 1437 struct inode *inode = container_of(head, struct inode, i_rcu); 1438 kmem_cache_free(ufs_inode_cachep, UFS_I(inode)); 1439 } 1440 1441 static void ufs_destroy_inode(struct inode *inode) 1442 { 1443 call_rcu(&inode->i_rcu, ufs_i_callback); 1444 } 1445 1446 static void init_once(void *foo) 1447 { 1448 struct ufs_inode_info *ei = (struct ufs_inode_info *) foo; 1449 1450 inode_init_once(&ei->vfs_inode); 1451 } 1452 1453 static int __init init_inodecache(void) 1454 { 1455 ufs_inode_cachep = kmem_cache_create("ufs_inode_cache", 1456 sizeof(struct ufs_inode_info), 1457 0, (SLAB_RECLAIM_ACCOUNT| 1458 SLAB_MEM_SPREAD), 1459 init_once); 1460 if (ufs_inode_cachep == NULL) 1461 return -ENOMEM; 1462 return 0; 1463 } 1464 1465 static void destroy_inodecache(void) 1466 { 1467 /* 1468 * Make sure all delayed rcu free inodes are flushed before we 1469 * destroy cache. 1470 */ 1471 rcu_barrier(); 1472 kmem_cache_destroy(ufs_inode_cachep); 1473 } 1474 1475 static const struct super_operations ufs_super_ops = { 1476 .alloc_inode = ufs_alloc_inode, 1477 .destroy_inode = ufs_destroy_inode, 1478 .write_inode = ufs_write_inode, 1479 .evict_inode = ufs_evict_inode, 1480 .put_super = ufs_put_super, 1481 .sync_fs = ufs_sync_fs, 1482 .statfs = ufs_statfs, 1483 .remount_fs = ufs_remount, 1484 .show_options = ufs_show_options, 1485 }; 1486 1487 static struct dentry *ufs_mount(struct file_system_type *fs_type, 1488 int flags, const char *dev_name, void *data) 1489 { 1490 return mount_bdev(fs_type, flags, dev_name, data, ufs_fill_super); 1491 } 1492 1493 static struct file_system_type ufs_fs_type = { 1494 .owner = THIS_MODULE, 1495 .name = "ufs", 1496 .mount = ufs_mount, 1497 .kill_sb = kill_block_super, 1498 .fs_flags = FS_REQUIRES_DEV, 1499 }; 1500 MODULE_ALIAS_FS("ufs"); 1501 1502 static int __init init_ufs_fs(void) 1503 { 1504 int err = init_inodecache(); 1505 if (err) 1506 goto out1; 1507 err = register_filesystem(&ufs_fs_type); 1508 if (err) 1509 goto out; 1510 return 0; 1511 out: 1512 destroy_inodecache(); 1513 out1: 1514 return err; 1515 } 1516 1517 static void __exit exit_ufs_fs(void) 1518 { 1519 unregister_filesystem(&ufs_fs_type); 1520 destroy_inodecache(); 1521 } 1522 1523 module_init(init_ufs_fs) 1524 module_exit(exit_ufs_fs) 1525 MODULE_LICENSE("GPL"); 1526