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 <linux/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 static struct inode *ufs_nfs_get_inode(struct super_block *sb, u64 ino, u32 generation) 98 { 99 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 100 struct inode *inode; 101 102 if (ino < UFS_ROOTINO || ino > uspi->s_ncg * uspi->s_ipg) 103 return ERR_PTR(-ESTALE); 104 105 inode = ufs_iget(sb, ino); 106 if (IS_ERR(inode)) 107 return ERR_CAST(inode); 108 if (generation && inode->i_generation != generation) { 109 iput(inode); 110 return ERR_PTR(-ESTALE); 111 } 112 return inode; 113 } 114 115 static struct dentry *ufs_fh_to_dentry(struct super_block *sb, struct fid *fid, 116 int fh_len, int fh_type) 117 { 118 return generic_fh_to_dentry(sb, fid, fh_len, fh_type, ufs_nfs_get_inode); 119 } 120 121 static struct dentry *ufs_fh_to_parent(struct super_block *sb, struct fid *fid, 122 int fh_len, int fh_type) 123 { 124 return generic_fh_to_parent(sb, fid, fh_len, fh_type, ufs_nfs_get_inode); 125 } 126 127 static struct dentry *ufs_get_parent(struct dentry *child) 128 { 129 struct qstr dot_dot = QSTR_INIT("..", 2); 130 ino_t ino; 131 132 ino = ufs_inode_by_name(d_inode(child), &dot_dot); 133 if (!ino) 134 return ERR_PTR(-ENOENT); 135 return d_obtain_alias(ufs_iget(child->d_sb, ino)); 136 } 137 138 static const struct export_operations ufs_export_ops = { 139 .fh_to_dentry = ufs_fh_to_dentry, 140 .fh_to_parent = ufs_fh_to_parent, 141 .get_parent = ufs_get_parent, 142 }; 143 144 #ifdef CONFIG_UFS_DEBUG 145 /* 146 * Print contents of ufs_super_block, useful for debugging 147 */ 148 static void ufs_print_super_stuff(struct super_block *sb, 149 struct ufs_super_block_first *usb1, 150 struct ufs_super_block_second *usb2, 151 struct ufs_super_block_third *usb3) 152 { 153 u32 magic = fs32_to_cpu(sb, usb3->fs_magic); 154 155 pr_debug("ufs_print_super_stuff\n"); 156 pr_debug(" magic: 0x%x\n", magic); 157 if (fs32_to_cpu(sb, usb3->fs_magic) == UFS2_MAGIC) { 158 pr_debug(" fs_size: %llu\n", (unsigned long long) 159 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size)); 160 pr_debug(" fs_dsize: %llu\n", (unsigned long long) 161 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize)); 162 pr_debug(" bsize: %u\n", 163 fs32_to_cpu(sb, usb1->fs_bsize)); 164 pr_debug(" fsize: %u\n", 165 fs32_to_cpu(sb, usb1->fs_fsize)); 166 pr_debug(" fs_volname: %s\n", usb2->fs_un.fs_u2.fs_volname); 167 pr_debug(" fs_sblockloc: %llu\n", (unsigned long long) 168 fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc)); 169 pr_debug(" cs_ndir(No of dirs): %llu\n", (unsigned long long) 170 fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir)); 171 pr_debug(" cs_nbfree(No of free blocks): %llu\n", 172 (unsigned long long) 173 fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree)); 174 pr_info(" cs_nifree(Num of free inodes): %llu\n", 175 (unsigned long long) 176 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree)); 177 pr_info(" cs_nffree(Num of free frags): %llu\n", 178 (unsigned long long) 179 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree)); 180 pr_info(" fs_maxsymlinklen: %u\n", 181 fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen)); 182 } else { 183 pr_debug(" sblkno: %u\n", fs32_to_cpu(sb, usb1->fs_sblkno)); 184 pr_debug(" cblkno: %u\n", fs32_to_cpu(sb, usb1->fs_cblkno)); 185 pr_debug(" iblkno: %u\n", fs32_to_cpu(sb, usb1->fs_iblkno)); 186 pr_debug(" dblkno: %u\n", fs32_to_cpu(sb, usb1->fs_dblkno)); 187 pr_debug(" cgoffset: %u\n", 188 fs32_to_cpu(sb, usb1->fs_cgoffset)); 189 pr_debug(" ~cgmask: 0x%x\n", 190 ~fs32_to_cpu(sb, usb1->fs_cgmask)); 191 pr_debug(" size: %u\n", fs32_to_cpu(sb, usb1->fs_size)); 192 pr_debug(" dsize: %u\n", fs32_to_cpu(sb, usb1->fs_dsize)); 193 pr_debug(" ncg: %u\n", fs32_to_cpu(sb, usb1->fs_ncg)); 194 pr_debug(" bsize: %u\n", fs32_to_cpu(sb, usb1->fs_bsize)); 195 pr_debug(" fsize: %u\n", fs32_to_cpu(sb, usb1->fs_fsize)); 196 pr_debug(" frag: %u\n", fs32_to_cpu(sb, usb1->fs_frag)); 197 pr_debug(" fragshift: %u\n", 198 fs32_to_cpu(sb, usb1->fs_fragshift)); 199 pr_debug(" ~fmask: %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask)); 200 pr_debug(" fshift: %u\n", fs32_to_cpu(sb, usb1->fs_fshift)); 201 pr_debug(" sbsize: %u\n", fs32_to_cpu(sb, usb1->fs_sbsize)); 202 pr_debug(" spc: %u\n", fs32_to_cpu(sb, usb1->fs_spc)); 203 pr_debug(" cpg: %u\n", fs32_to_cpu(sb, usb1->fs_cpg)); 204 pr_debug(" ipg: %u\n", fs32_to_cpu(sb, usb1->fs_ipg)); 205 pr_debug(" fpg: %u\n", fs32_to_cpu(sb, usb1->fs_fpg)); 206 pr_debug(" csaddr: %u\n", fs32_to_cpu(sb, usb1->fs_csaddr)); 207 pr_debug(" cssize: %u\n", fs32_to_cpu(sb, usb1->fs_cssize)); 208 pr_debug(" cgsize: %u\n", fs32_to_cpu(sb, usb1->fs_cgsize)); 209 pr_debug(" fstodb: %u\n", 210 fs32_to_cpu(sb, usb1->fs_fsbtodb)); 211 pr_debug(" nrpos: %u\n", fs32_to_cpu(sb, usb3->fs_nrpos)); 212 pr_debug(" ndir %u\n", 213 fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir)); 214 pr_debug(" nifree %u\n", 215 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree)); 216 pr_debug(" nbfree %u\n", 217 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree)); 218 pr_debug(" nffree %u\n", 219 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree)); 220 } 221 pr_debug("\n"); 222 } 223 224 /* 225 * Print contents of ufs_cylinder_group, useful for debugging 226 */ 227 static void ufs_print_cylinder_stuff(struct super_block *sb, 228 struct ufs_cylinder_group *cg) 229 { 230 pr_debug("\nufs_print_cylinder_stuff\n"); 231 pr_debug("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group)); 232 pr_debug(" magic: %x\n", fs32_to_cpu(sb, cg->cg_magic)); 233 pr_debug(" time: %u\n", fs32_to_cpu(sb, cg->cg_time)); 234 pr_debug(" cgx: %u\n", fs32_to_cpu(sb, cg->cg_cgx)); 235 pr_debug(" ncyl: %u\n", fs16_to_cpu(sb, cg->cg_ncyl)); 236 pr_debug(" niblk: %u\n", fs16_to_cpu(sb, cg->cg_niblk)); 237 pr_debug(" ndblk: %u\n", fs32_to_cpu(sb, cg->cg_ndblk)); 238 pr_debug(" cs_ndir: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir)); 239 pr_debug(" cs_nbfree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree)); 240 pr_debug(" cs_nifree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree)); 241 pr_debug(" cs_nffree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree)); 242 pr_debug(" rotor: %u\n", fs32_to_cpu(sb, cg->cg_rotor)); 243 pr_debug(" frotor: %u\n", fs32_to_cpu(sb, cg->cg_frotor)); 244 pr_debug(" irotor: %u\n", fs32_to_cpu(sb, cg->cg_irotor)); 245 pr_debug(" frsum: %u, %u, %u, %u, %u, %u, %u, %u\n", 246 fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]), 247 fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]), 248 fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]), 249 fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7])); 250 pr_debug(" btotoff: %u\n", fs32_to_cpu(sb, cg->cg_btotoff)); 251 pr_debug(" boff: %u\n", fs32_to_cpu(sb, cg->cg_boff)); 252 pr_debug(" iuseoff: %u\n", fs32_to_cpu(sb, cg->cg_iusedoff)); 253 pr_debug(" freeoff: %u\n", fs32_to_cpu(sb, cg->cg_freeoff)); 254 pr_debug(" nextfreeoff: %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff)); 255 pr_debug(" clustersumoff %u\n", 256 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff)); 257 pr_debug(" clusteroff %u\n", 258 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff)); 259 pr_debug(" nclusterblks %u\n", 260 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks)); 261 pr_debug("\n"); 262 } 263 #else 264 # define ufs_print_super_stuff(sb, usb1, usb2, usb3) /**/ 265 # define ufs_print_cylinder_stuff(sb, cg) /**/ 266 #endif /* CONFIG_UFS_DEBUG */ 267 268 static const struct super_operations ufs_super_ops; 269 270 void ufs_error (struct super_block * sb, const char * function, 271 const char * fmt, ...) 272 { 273 struct ufs_sb_private_info * uspi; 274 struct ufs_super_block_first * usb1; 275 struct va_format vaf; 276 va_list args; 277 278 uspi = UFS_SB(sb)->s_uspi; 279 usb1 = ubh_get_usb_first(uspi); 280 281 if (!(sb->s_flags & MS_RDONLY)) { 282 usb1->fs_clean = UFS_FSBAD; 283 ubh_mark_buffer_dirty(USPI_UBH(uspi)); 284 ufs_mark_sb_dirty(sb); 285 sb->s_flags |= MS_RDONLY; 286 } 287 va_start(args, fmt); 288 vaf.fmt = fmt; 289 vaf.va = &args; 290 switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) { 291 case UFS_MOUNT_ONERROR_PANIC: 292 panic("panic (device %s): %s: %pV\n", 293 sb->s_id, function, &vaf); 294 295 case UFS_MOUNT_ONERROR_LOCK: 296 case UFS_MOUNT_ONERROR_UMOUNT: 297 case UFS_MOUNT_ONERROR_REPAIR: 298 pr_crit("error (device %s): %s: %pV\n", 299 sb->s_id, function, &vaf); 300 } 301 va_end(args); 302 } 303 304 void ufs_panic (struct super_block * sb, const char * function, 305 const char * fmt, ...) 306 { 307 struct ufs_sb_private_info * uspi; 308 struct ufs_super_block_first * usb1; 309 struct va_format vaf; 310 va_list args; 311 312 uspi = UFS_SB(sb)->s_uspi; 313 usb1 = ubh_get_usb_first(uspi); 314 315 if (!(sb->s_flags & MS_RDONLY)) { 316 usb1->fs_clean = UFS_FSBAD; 317 ubh_mark_buffer_dirty(USPI_UBH(uspi)); 318 ufs_mark_sb_dirty(sb); 319 } 320 va_start(args, fmt); 321 vaf.fmt = fmt; 322 vaf.va = &args; 323 sb->s_flags |= MS_RDONLY; 324 pr_crit("panic (device %s): %s: %pV\n", 325 sb->s_id, function, &vaf); 326 va_end(args); 327 } 328 329 void ufs_warning (struct super_block * sb, const char * function, 330 const char * fmt, ...) 331 { 332 struct va_format vaf; 333 va_list args; 334 335 va_start(args, fmt); 336 vaf.fmt = fmt; 337 vaf.va = &args; 338 pr_warn("(device %s): %s: %pV\n", 339 sb->s_id, function, &vaf); 340 va_end(args); 341 } 342 343 enum { 344 Opt_type_old = UFS_MOUNT_UFSTYPE_OLD, 345 Opt_type_sunx86 = UFS_MOUNT_UFSTYPE_SUNx86, 346 Opt_type_sun = UFS_MOUNT_UFSTYPE_SUN, 347 Opt_type_sunos = UFS_MOUNT_UFSTYPE_SUNOS, 348 Opt_type_44bsd = UFS_MOUNT_UFSTYPE_44BSD, 349 Opt_type_ufs2 = UFS_MOUNT_UFSTYPE_UFS2, 350 Opt_type_hp = UFS_MOUNT_UFSTYPE_HP, 351 Opt_type_nextstepcd = UFS_MOUNT_UFSTYPE_NEXTSTEP_CD, 352 Opt_type_nextstep = UFS_MOUNT_UFSTYPE_NEXTSTEP, 353 Opt_type_openstep = UFS_MOUNT_UFSTYPE_OPENSTEP, 354 Opt_onerror_panic = UFS_MOUNT_ONERROR_PANIC, 355 Opt_onerror_lock = UFS_MOUNT_ONERROR_LOCK, 356 Opt_onerror_umount = UFS_MOUNT_ONERROR_UMOUNT, 357 Opt_onerror_repair = UFS_MOUNT_ONERROR_REPAIR, 358 Opt_err 359 }; 360 361 static const match_table_t tokens = { 362 {Opt_type_old, "ufstype=old"}, 363 {Opt_type_sunx86, "ufstype=sunx86"}, 364 {Opt_type_sun, "ufstype=sun"}, 365 {Opt_type_sunos, "ufstype=sunos"}, 366 {Opt_type_44bsd, "ufstype=44bsd"}, 367 {Opt_type_ufs2, "ufstype=ufs2"}, 368 {Opt_type_ufs2, "ufstype=5xbsd"}, 369 {Opt_type_hp, "ufstype=hp"}, 370 {Opt_type_nextstepcd, "ufstype=nextstep-cd"}, 371 {Opt_type_nextstep, "ufstype=nextstep"}, 372 {Opt_type_openstep, "ufstype=openstep"}, 373 /*end of possible ufs types */ 374 {Opt_onerror_panic, "onerror=panic"}, 375 {Opt_onerror_lock, "onerror=lock"}, 376 {Opt_onerror_umount, "onerror=umount"}, 377 {Opt_onerror_repair, "onerror=repair"}, 378 {Opt_err, NULL} 379 }; 380 381 static int ufs_parse_options (char * options, unsigned * mount_options) 382 { 383 char * p; 384 385 UFSD("ENTER\n"); 386 387 if (!options) 388 return 1; 389 390 while ((p = strsep(&options, ",")) != NULL) { 391 substring_t args[MAX_OPT_ARGS]; 392 int token; 393 if (!*p) 394 continue; 395 396 token = match_token(p, tokens, args); 397 switch (token) { 398 case Opt_type_old: 399 ufs_clear_opt (*mount_options, UFSTYPE); 400 ufs_set_opt (*mount_options, UFSTYPE_OLD); 401 break; 402 case Opt_type_sunx86: 403 ufs_clear_opt (*mount_options, UFSTYPE); 404 ufs_set_opt (*mount_options, UFSTYPE_SUNx86); 405 break; 406 case Opt_type_sun: 407 ufs_clear_opt (*mount_options, UFSTYPE); 408 ufs_set_opt (*mount_options, UFSTYPE_SUN); 409 break; 410 case Opt_type_sunos: 411 ufs_clear_opt(*mount_options, UFSTYPE); 412 ufs_set_opt(*mount_options, UFSTYPE_SUNOS); 413 break; 414 case Opt_type_44bsd: 415 ufs_clear_opt (*mount_options, UFSTYPE); 416 ufs_set_opt (*mount_options, UFSTYPE_44BSD); 417 break; 418 case Opt_type_ufs2: 419 ufs_clear_opt(*mount_options, UFSTYPE); 420 ufs_set_opt(*mount_options, UFSTYPE_UFS2); 421 break; 422 case Opt_type_hp: 423 ufs_clear_opt (*mount_options, UFSTYPE); 424 ufs_set_opt (*mount_options, UFSTYPE_HP); 425 break; 426 case Opt_type_nextstepcd: 427 ufs_clear_opt (*mount_options, UFSTYPE); 428 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD); 429 break; 430 case Opt_type_nextstep: 431 ufs_clear_opt (*mount_options, UFSTYPE); 432 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP); 433 break; 434 case Opt_type_openstep: 435 ufs_clear_opt (*mount_options, UFSTYPE); 436 ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP); 437 break; 438 case Opt_onerror_panic: 439 ufs_clear_opt (*mount_options, ONERROR); 440 ufs_set_opt (*mount_options, ONERROR_PANIC); 441 break; 442 case Opt_onerror_lock: 443 ufs_clear_opt (*mount_options, ONERROR); 444 ufs_set_opt (*mount_options, ONERROR_LOCK); 445 break; 446 case Opt_onerror_umount: 447 ufs_clear_opt (*mount_options, ONERROR); 448 ufs_set_opt (*mount_options, ONERROR_UMOUNT); 449 break; 450 case Opt_onerror_repair: 451 pr_err("Unable to do repair on error, will lock lock instead\n"); 452 ufs_clear_opt (*mount_options, ONERROR); 453 ufs_set_opt (*mount_options, ONERROR_REPAIR); 454 break; 455 default: 456 pr_err("Invalid option: \"%s\" or missing value\n", p); 457 return 0; 458 } 459 } 460 return 1; 461 } 462 463 /* 464 * Different types of UFS hold fs_cstotal in different 465 * places, and use different data structure for it. 466 * To make things simpler we just copy fs_cstotal to ufs_sb_private_info 467 */ 468 static void ufs_setup_cstotal(struct super_block *sb) 469 { 470 struct ufs_sb_info *sbi = UFS_SB(sb); 471 struct ufs_sb_private_info *uspi = sbi->s_uspi; 472 struct ufs_super_block_first *usb1; 473 struct ufs_super_block_second *usb2; 474 struct ufs_super_block_third *usb3; 475 unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE; 476 477 UFSD("ENTER, mtype=%u\n", mtype); 478 usb1 = ubh_get_usb_first(uspi); 479 usb2 = ubh_get_usb_second(uspi); 480 usb3 = ubh_get_usb_third(uspi); 481 482 if ((mtype == UFS_MOUNT_UFSTYPE_44BSD && 483 (usb2->fs_un.fs_u2.fs_maxbsize == usb1->fs_bsize)) || 484 mtype == UFS_MOUNT_UFSTYPE_UFS2) { 485 /*we have statistic in different place, then usual*/ 486 uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir); 487 uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree); 488 uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree); 489 uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree); 490 } else { 491 uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir); 492 uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree); 493 uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree); 494 uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree); 495 } 496 UFSD("EXIT\n"); 497 } 498 499 /* 500 * Read on-disk structures associated with cylinder groups 501 */ 502 static int ufs_read_cylinder_structures(struct super_block *sb) 503 { 504 struct ufs_sb_info *sbi = UFS_SB(sb); 505 struct ufs_sb_private_info *uspi = sbi->s_uspi; 506 struct ufs_buffer_head * ubh; 507 unsigned char * base, * space; 508 unsigned size, blks, i; 509 510 UFSD("ENTER\n"); 511 512 /* 513 * Read cs structures from (usually) first data block 514 * on the device. 515 */ 516 size = uspi->s_cssize; 517 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift; 518 base = space = kmalloc(size, GFP_NOFS); 519 if (!base) 520 goto failed; 521 sbi->s_csp = (struct ufs_csum *)space; 522 for (i = 0; i < blks; i += uspi->s_fpb) { 523 size = uspi->s_bsize; 524 if (i + uspi->s_fpb > blks) 525 size = (blks - i) * uspi->s_fsize; 526 527 ubh = ubh_bread(sb, uspi->s_csaddr + i, size); 528 529 if (!ubh) 530 goto failed; 531 532 ubh_ubhcpymem (space, ubh, size); 533 534 space += size; 535 ubh_brelse (ubh); 536 ubh = NULL; 537 } 538 539 /* 540 * Read cylinder group (we read only first fragment from block 541 * at this time) and prepare internal data structures for cg caching. 542 */ 543 if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_NOFS))) 544 goto failed; 545 for (i = 0; i < uspi->s_ncg; i++) 546 sbi->s_ucg[i] = NULL; 547 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) { 548 sbi->s_ucpi[i] = NULL; 549 sbi->s_cgno[i] = UFS_CGNO_EMPTY; 550 } 551 for (i = 0; i < uspi->s_ncg; i++) { 552 UFSD("read cg %u\n", i); 553 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i)))) 554 goto failed; 555 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data)) 556 goto failed; 557 558 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data); 559 } 560 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) { 561 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_NOFS))) 562 goto failed; 563 sbi->s_cgno[i] = UFS_CGNO_EMPTY; 564 } 565 sbi->s_cg_loaded = 0; 566 UFSD("EXIT\n"); 567 return 1; 568 569 failed: 570 kfree (base); 571 if (sbi->s_ucg) { 572 for (i = 0; i < uspi->s_ncg; i++) 573 if (sbi->s_ucg[i]) 574 brelse (sbi->s_ucg[i]); 575 kfree (sbi->s_ucg); 576 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) 577 kfree (sbi->s_ucpi[i]); 578 } 579 UFSD("EXIT (FAILED)\n"); 580 return 0; 581 } 582 583 /* 584 * Sync our internal copy of fs_cstotal with disk 585 */ 586 static void ufs_put_cstotal(struct super_block *sb) 587 { 588 unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE; 589 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 590 struct ufs_super_block_first *usb1; 591 struct ufs_super_block_second *usb2; 592 struct ufs_super_block_third *usb3; 593 594 UFSD("ENTER\n"); 595 usb1 = ubh_get_usb_first(uspi); 596 usb2 = ubh_get_usb_second(uspi); 597 usb3 = ubh_get_usb_third(uspi); 598 599 if (mtype == UFS_MOUNT_UFSTYPE_UFS2) { 600 /*we have statistic in different place, then usual*/ 601 usb2->fs_un.fs_u2.cs_ndir = 602 cpu_to_fs64(sb, uspi->cs_total.cs_ndir); 603 usb2->fs_un.fs_u2.cs_nbfree = 604 cpu_to_fs64(sb, uspi->cs_total.cs_nbfree); 605 usb3->fs_un1.fs_u2.cs_nifree = 606 cpu_to_fs64(sb, uspi->cs_total.cs_nifree); 607 usb3->fs_un1.fs_u2.cs_nffree = 608 cpu_to_fs64(sb, uspi->cs_total.cs_nffree); 609 goto out; 610 } 611 612 if (mtype == UFS_MOUNT_UFSTYPE_44BSD && 613 (usb2->fs_un.fs_u2.fs_maxbsize == usb1->fs_bsize)) { 614 /* store stats in both old and new places */ 615 usb2->fs_un.fs_u2.cs_ndir = 616 cpu_to_fs64(sb, uspi->cs_total.cs_ndir); 617 usb2->fs_un.fs_u2.cs_nbfree = 618 cpu_to_fs64(sb, uspi->cs_total.cs_nbfree); 619 usb3->fs_un1.fs_u2.cs_nifree = 620 cpu_to_fs64(sb, uspi->cs_total.cs_nifree); 621 usb3->fs_un1.fs_u2.cs_nffree = 622 cpu_to_fs64(sb, uspi->cs_total.cs_nffree); 623 } 624 usb1->fs_cstotal.cs_ndir = cpu_to_fs32(sb, uspi->cs_total.cs_ndir); 625 usb1->fs_cstotal.cs_nbfree = cpu_to_fs32(sb, uspi->cs_total.cs_nbfree); 626 usb1->fs_cstotal.cs_nifree = cpu_to_fs32(sb, uspi->cs_total.cs_nifree); 627 usb1->fs_cstotal.cs_nffree = cpu_to_fs32(sb, uspi->cs_total.cs_nffree); 628 out: 629 ubh_mark_buffer_dirty(USPI_UBH(uspi)); 630 ufs_print_super_stuff(sb, usb1, usb2, usb3); 631 UFSD("EXIT\n"); 632 } 633 634 /** 635 * ufs_put_super_internal() - put on-disk intrenal structures 636 * @sb: pointer to super_block structure 637 * Put on-disk structures associated with cylinder groups 638 * and write them back to disk, also update cs_total on disk 639 */ 640 static void ufs_put_super_internal(struct super_block *sb) 641 { 642 struct ufs_sb_info *sbi = UFS_SB(sb); 643 struct ufs_sb_private_info *uspi = sbi->s_uspi; 644 struct ufs_buffer_head * ubh; 645 unsigned char * base, * space; 646 unsigned blks, size, i; 647 648 649 UFSD("ENTER\n"); 650 651 ufs_put_cstotal(sb); 652 size = uspi->s_cssize; 653 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift; 654 base = space = (char*) sbi->s_csp; 655 for (i = 0; i < blks; i += uspi->s_fpb) { 656 size = uspi->s_bsize; 657 if (i + uspi->s_fpb > blks) 658 size = (blks - i) * uspi->s_fsize; 659 660 ubh = ubh_bread(sb, uspi->s_csaddr + i, size); 661 662 ubh_memcpyubh (ubh, space, size); 663 space += size; 664 ubh_mark_buffer_uptodate (ubh, 1); 665 ubh_mark_buffer_dirty (ubh); 666 ubh_brelse (ubh); 667 } 668 for (i = 0; i < sbi->s_cg_loaded; i++) { 669 ufs_put_cylinder (sb, i); 670 kfree (sbi->s_ucpi[i]); 671 } 672 for (; i < UFS_MAX_GROUP_LOADED; i++) 673 kfree (sbi->s_ucpi[i]); 674 for (i = 0; i < uspi->s_ncg; i++) 675 brelse (sbi->s_ucg[i]); 676 kfree (sbi->s_ucg); 677 kfree (base); 678 679 UFSD("EXIT\n"); 680 } 681 682 static int ufs_sync_fs(struct super_block *sb, int wait) 683 { 684 struct ufs_sb_private_info * uspi; 685 struct ufs_super_block_first * usb1; 686 struct ufs_super_block_third * usb3; 687 unsigned flags; 688 689 mutex_lock(&UFS_SB(sb)->s_lock); 690 691 UFSD("ENTER\n"); 692 693 flags = UFS_SB(sb)->s_flags; 694 uspi = UFS_SB(sb)->s_uspi; 695 usb1 = ubh_get_usb_first(uspi); 696 usb3 = ubh_get_usb_third(uspi); 697 698 usb1->fs_time = cpu_to_fs32(sb, get_seconds()); 699 if ((flags & UFS_ST_MASK) == UFS_ST_SUN || 700 (flags & UFS_ST_MASK) == UFS_ST_SUNOS || 701 (flags & UFS_ST_MASK) == UFS_ST_SUNx86) 702 ufs_set_fs_state(sb, usb1, usb3, 703 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time)); 704 ufs_put_cstotal(sb); 705 706 UFSD("EXIT\n"); 707 mutex_unlock(&UFS_SB(sb)->s_lock); 708 709 return 0; 710 } 711 712 static void delayed_sync_fs(struct work_struct *work) 713 { 714 struct ufs_sb_info *sbi; 715 716 sbi = container_of(work, struct ufs_sb_info, sync_work.work); 717 718 spin_lock(&sbi->work_lock); 719 sbi->work_queued = 0; 720 spin_unlock(&sbi->work_lock); 721 722 ufs_sync_fs(sbi->sb, 1); 723 } 724 725 void ufs_mark_sb_dirty(struct super_block *sb) 726 { 727 struct ufs_sb_info *sbi = UFS_SB(sb); 728 unsigned long delay; 729 730 spin_lock(&sbi->work_lock); 731 if (!sbi->work_queued) { 732 delay = msecs_to_jiffies(dirty_writeback_interval * 10); 733 queue_delayed_work(system_long_wq, &sbi->sync_work, delay); 734 sbi->work_queued = 1; 735 } 736 spin_unlock(&sbi->work_lock); 737 } 738 739 static void ufs_put_super(struct super_block *sb) 740 { 741 struct ufs_sb_info * sbi = UFS_SB(sb); 742 743 UFSD("ENTER\n"); 744 745 if (!(sb->s_flags & MS_RDONLY)) 746 ufs_put_super_internal(sb); 747 cancel_delayed_work_sync(&sbi->sync_work); 748 749 ubh_brelse_uspi (sbi->s_uspi); 750 kfree (sbi->s_uspi); 751 kfree (sbi); 752 sb->s_fs_info = NULL; 753 UFSD("EXIT\n"); 754 return; 755 } 756 757 static u64 ufs_max_bytes(struct super_block *sb) 758 { 759 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 760 int bits = uspi->s_apbshift; 761 u64 res; 762 763 if (bits > 21) 764 res = ~0ULL; 765 else 766 res = UFS_NDADDR + (1LL << bits) + (1LL << (2*bits)) + 767 (1LL << (3*bits)); 768 769 if (res >= (MAX_LFS_FILESIZE >> uspi->s_bshift)) 770 return MAX_LFS_FILESIZE; 771 return res << uspi->s_bshift; 772 } 773 774 static int ufs_fill_super(struct super_block *sb, void *data, int silent) 775 { 776 struct ufs_sb_info * sbi; 777 struct ufs_sb_private_info * uspi; 778 struct ufs_super_block_first * usb1; 779 struct ufs_super_block_second * usb2; 780 struct ufs_super_block_third * usb3; 781 struct ufs_buffer_head * ubh; 782 struct inode *inode; 783 unsigned block_size, super_block_size; 784 unsigned flags; 785 unsigned super_block_offset; 786 unsigned maxsymlen; 787 int ret = -EINVAL; 788 789 uspi = NULL; 790 ubh = NULL; 791 flags = 0; 792 793 UFSD("ENTER\n"); 794 795 #ifndef CONFIG_UFS_FS_WRITE 796 if (!(sb->s_flags & MS_RDONLY)) { 797 pr_err("ufs was compiled with read-only support, can't be mounted as read-write\n"); 798 return -EROFS; 799 } 800 #endif 801 802 sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL); 803 if (!sbi) 804 goto failed_nomem; 805 sb->s_fs_info = sbi; 806 sbi->sb = sb; 807 808 UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY)); 809 810 mutex_init(&sbi->s_lock); 811 spin_lock_init(&sbi->work_lock); 812 INIT_DELAYED_WORK(&sbi->sync_work, delayed_sync_fs); 813 /* 814 * Set default mount options 815 * Parse mount options 816 */ 817 sbi->s_mount_opt = 0; 818 ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK); 819 if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) { 820 pr_err("wrong mount options\n"); 821 goto failed; 822 } 823 if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) { 824 if (!silent) 825 pr_err("You didn't specify the type of your ufs filesystem\n\n" 826 "mount -t ufs -o ufstype=" 827 "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n" 828 ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, " 829 "default is ufstype=old\n"); 830 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD); 831 } 832 833 uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL); 834 sbi->s_uspi = uspi; 835 if (!uspi) 836 goto failed; 837 uspi->s_dirblksize = UFS_SECTOR_SIZE; 838 super_block_offset=UFS_SBLOCK; 839 840 sb->s_maxbytes = MAX_LFS_FILESIZE; 841 842 switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) { 843 case UFS_MOUNT_UFSTYPE_44BSD: 844 UFSD("ufstype=44bsd\n"); 845 uspi->s_fsize = block_size = 512; 846 uspi->s_fmask = ~(512 - 1); 847 uspi->s_fshift = 9; 848 uspi->s_sbsize = super_block_size = 1536; 849 uspi->s_sbbase = 0; 850 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; 851 break; 852 case UFS_MOUNT_UFSTYPE_UFS2: 853 UFSD("ufstype=ufs2\n"); 854 super_block_offset=SBLOCK_UFS2; 855 uspi->s_fsize = block_size = 512; 856 uspi->s_fmask = ~(512 - 1); 857 uspi->s_fshift = 9; 858 uspi->s_sbsize = super_block_size = 1536; 859 uspi->s_sbbase = 0; 860 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; 861 break; 862 863 case UFS_MOUNT_UFSTYPE_SUN: 864 UFSD("ufstype=sun\n"); 865 uspi->s_fsize = block_size = 1024; 866 uspi->s_fmask = ~(1024 - 1); 867 uspi->s_fshift = 10; 868 uspi->s_sbsize = super_block_size = 2048; 869 uspi->s_sbbase = 0; 870 uspi->s_maxsymlinklen = 0; /* Not supported on disk */ 871 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN; 872 break; 873 874 case UFS_MOUNT_UFSTYPE_SUNOS: 875 UFSD("ufstype=sunos\n"); 876 uspi->s_fsize = block_size = 1024; 877 uspi->s_fmask = ~(1024 - 1); 878 uspi->s_fshift = 10; 879 uspi->s_sbsize = 2048; 880 super_block_size = 2048; 881 uspi->s_sbbase = 0; 882 uspi->s_maxsymlinklen = 0; /* Not supported on disk */ 883 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_SUNOS | UFS_CG_SUN; 884 break; 885 886 case UFS_MOUNT_UFSTYPE_SUNx86: 887 UFSD("ufstype=sunx86\n"); 888 uspi->s_fsize = block_size = 1024; 889 uspi->s_fmask = ~(1024 - 1); 890 uspi->s_fshift = 10; 891 uspi->s_sbsize = super_block_size = 2048; 892 uspi->s_sbbase = 0; 893 uspi->s_maxsymlinklen = 0; /* Not supported on disk */ 894 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN; 895 break; 896 897 case UFS_MOUNT_UFSTYPE_OLD: 898 UFSD("ufstype=old\n"); 899 uspi->s_fsize = block_size = 1024; 900 uspi->s_fmask = ~(1024 - 1); 901 uspi->s_fshift = 10; 902 uspi->s_sbsize = super_block_size = 2048; 903 uspi->s_sbbase = 0; 904 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 905 if (!(sb->s_flags & MS_RDONLY)) { 906 if (!silent) 907 pr_info("ufstype=old is supported read-only\n"); 908 sb->s_flags |= MS_RDONLY; 909 } 910 break; 911 912 case UFS_MOUNT_UFSTYPE_NEXTSTEP: 913 UFSD("ufstype=nextstep\n"); 914 uspi->s_fsize = block_size = 1024; 915 uspi->s_fmask = ~(1024 - 1); 916 uspi->s_fshift = 10; 917 uspi->s_sbsize = super_block_size = 2048; 918 uspi->s_sbbase = 0; 919 uspi->s_dirblksize = 1024; 920 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 921 if (!(sb->s_flags & MS_RDONLY)) { 922 if (!silent) 923 pr_info("ufstype=nextstep is supported read-only\n"); 924 sb->s_flags |= MS_RDONLY; 925 } 926 break; 927 928 case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD: 929 UFSD("ufstype=nextstep-cd\n"); 930 uspi->s_fsize = block_size = 2048; 931 uspi->s_fmask = ~(2048 - 1); 932 uspi->s_fshift = 11; 933 uspi->s_sbsize = super_block_size = 2048; 934 uspi->s_sbbase = 0; 935 uspi->s_dirblksize = 1024; 936 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 937 if (!(sb->s_flags & MS_RDONLY)) { 938 if (!silent) 939 pr_info("ufstype=nextstep-cd is supported read-only\n"); 940 sb->s_flags |= MS_RDONLY; 941 } 942 break; 943 944 case UFS_MOUNT_UFSTYPE_OPENSTEP: 945 UFSD("ufstype=openstep\n"); 946 uspi->s_fsize = block_size = 1024; 947 uspi->s_fmask = ~(1024 - 1); 948 uspi->s_fshift = 10; 949 uspi->s_sbsize = super_block_size = 2048; 950 uspi->s_sbbase = 0; 951 uspi->s_dirblksize = 1024; 952 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; 953 if (!(sb->s_flags & MS_RDONLY)) { 954 if (!silent) 955 pr_info("ufstype=openstep is supported read-only\n"); 956 sb->s_flags |= MS_RDONLY; 957 } 958 break; 959 960 case UFS_MOUNT_UFSTYPE_HP: 961 UFSD("ufstype=hp\n"); 962 uspi->s_fsize = block_size = 1024; 963 uspi->s_fmask = ~(1024 - 1); 964 uspi->s_fshift = 10; 965 uspi->s_sbsize = super_block_size = 2048; 966 uspi->s_sbbase = 0; 967 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 968 if (!(sb->s_flags & MS_RDONLY)) { 969 if (!silent) 970 pr_info("ufstype=hp is supported read-only\n"); 971 sb->s_flags |= MS_RDONLY; 972 } 973 break; 974 default: 975 if (!silent) 976 pr_err("unknown ufstype\n"); 977 goto failed; 978 } 979 980 again: 981 if (!sb_set_blocksize(sb, block_size)) { 982 pr_err("failed to set blocksize\n"); 983 goto failed; 984 } 985 986 /* 987 * read ufs super block from device 988 */ 989 990 ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size); 991 992 if (!ubh) 993 goto failed; 994 995 usb1 = ubh_get_usb_first(uspi); 996 usb2 = ubh_get_usb_second(uspi); 997 usb3 = ubh_get_usb_third(uspi); 998 999 /* Sort out mod used on SunOS 4.1.3 for fs_state */ 1000 uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat); 1001 if (((flags & UFS_ST_MASK) == UFS_ST_SUNOS) && 1002 (uspi->s_postblformat != UFS_42POSTBLFMT)) { 1003 flags &= ~UFS_ST_MASK; 1004 flags |= UFS_ST_SUN; 1005 } 1006 1007 if ((flags & UFS_ST_MASK) == UFS_ST_44BSD && 1008 uspi->s_postblformat == UFS_42POSTBLFMT) { 1009 if (!silent) 1010 pr_err("this is not a 44bsd filesystem"); 1011 goto failed; 1012 } 1013 1014 /* 1015 * Check ufs magic number 1016 */ 1017 sbi->s_bytesex = BYTESEX_LE; 1018 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) { 1019 case UFS_MAGIC: 1020 case UFS_MAGIC_BW: 1021 case UFS2_MAGIC: 1022 case UFS_MAGIC_LFN: 1023 case UFS_MAGIC_FEA: 1024 case UFS_MAGIC_4GB: 1025 goto magic_found; 1026 } 1027 sbi->s_bytesex = BYTESEX_BE; 1028 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) { 1029 case UFS_MAGIC: 1030 case UFS_MAGIC_BW: 1031 case UFS2_MAGIC: 1032 case UFS_MAGIC_LFN: 1033 case UFS_MAGIC_FEA: 1034 case UFS_MAGIC_4GB: 1035 goto magic_found; 1036 } 1037 1038 if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP) 1039 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD) 1040 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP)) 1041 && uspi->s_sbbase < 256) { 1042 ubh_brelse_uspi(uspi); 1043 ubh = NULL; 1044 uspi->s_sbbase += 8; 1045 goto again; 1046 } 1047 if (!silent) 1048 pr_err("%s(): bad magic number\n", __func__); 1049 goto failed; 1050 1051 magic_found: 1052 /* 1053 * Check block and fragment sizes 1054 */ 1055 uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize); 1056 uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize); 1057 uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize); 1058 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask); 1059 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift); 1060 1061 if (!is_power_of_2(uspi->s_fsize)) { 1062 pr_err("%s(): fragment size %u is not a power of 2\n", 1063 __func__, uspi->s_fsize); 1064 goto failed; 1065 } 1066 if (uspi->s_fsize < 512) { 1067 pr_err("%s(): fragment size %u is too small\n", 1068 __func__, uspi->s_fsize); 1069 goto failed; 1070 } 1071 if (uspi->s_fsize > 4096) { 1072 pr_err("%s(): fragment size %u is too large\n", 1073 __func__, uspi->s_fsize); 1074 goto failed; 1075 } 1076 if (!is_power_of_2(uspi->s_bsize)) { 1077 pr_err("%s(): block size %u is not a power of 2\n", 1078 __func__, uspi->s_bsize); 1079 goto failed; 1080 } 1081 if (uspi->s_bsize < 4096) { 1082 pr_err("%s(): block size %u is too small\n", 1083 __func__, uspi->s_bsize); 1084 goto failed; 1085 } 1086 if (uspi->s_bsize / uspi->s_fsize > 8) { 1087 pr_err("%s(): too many fragments per block (%u)\n", 1088 __func__, uspi->s_bsize / uspi->s_fsize); 1089 goto failed; 1090 } 1091 if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) { 1092 ubh_brelse_uspi(uspi); 1093 ubh = NULL; 1094 block_size = uspi->s_fsize; 1095 super_block_size = uspi->s_sbsize; 1096 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size); 1097 goto again; 1098 } 1099 1100 sbi->s_flags = flags;/*after that line some functions use s_flags*/ 1101 ufs_print_super_stuff(sb, usb1, usb2, usb3); 1102 1103 /* 1104 * Check, if file system was correctly unmounted. 1105 * If not, make it read only. 1106 */ 1107 if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) || 1108 ((flags & UFS_ST_MASK) == UFS_ST_OLD) || 1109 (((flags & UFS_ST_MASK) == UFS_ST_SUN || 1110 (flags & UFS_ST_MASK) == UFS_ST_SUNOS || 1111 (flags & UFS_ST_MASK) == UFS_ST_SUNx86) && 1112 (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) { 1113 switch(usb1->fs_clean) { 1114 case UFS_FSCLEAN: 1115 UFSD("fs is clean\n"); 1116 break; 1117 case UFS_FSSTABLE: 1118 UFSD("fs is stable\n"); 1119 break; 1120 case UFS_FSLOG: 1121 UFSD("fs is logging fs\n"); 1122 break; 1123 case UFS_FSOSF1: 1124 UFSD("fs is DEC OSF/1\n"); 1125 break; 1126 case UFS_FSACTIVE: 1127 pr_err("%s(): fs is active\n", __func__); 1128 sb->s_flags |= MS_RDONLY; 1129 break; 1130 case UFS_FSBAD: 1131 pr_err("%s(): fs is bad\n", __func__); 1132 sb->s_flags |= MS_RDONLY; 1133 break; 1134 default: 1135 pr_err("%s(): can't grok fs_clean 0x%x\n", 1136 __func__, usb1->fs_clean); 1137 sb->s_flags |= MS_RDONLY; 1138 break; 1139 } 1140 } else { 1141 pr_err("%s(): fs needs fsck\n", __func__); 1142 sb->s_flags |= MS_RDONLY; 1143 } 1144 1145 /* 1146 * Read ufs_super_block into internal data structures 1147 */ 1148 sb->s_op = &ufs_super_ops; 1149 sb->s_export_op = &ufs_export_ops; 1150 1151 sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic); 1152 1153 uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno); 1154 uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno); 1155 uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno); 1156 uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno); 1157 uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset); 1158 uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask); 1159 1160 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { 1161 uspi->s_size = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size); 1162 uspi->s_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize); 1163 } else { 1164 uspi->s_size = fs32_to_cpu(sb, usb1->fs_size); 1165 uspi->s_dsize = fs32_to_cpu(sb, usb1->fs_dsize); 1166 } 1167 1168 uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg); 1169 /* s_bsize already set */ 1170 /* s_fsize already set */ 1171 uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag); 1172 uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree); 1173 uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask); 1174 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask); 1175 uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift); 1176 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift); 1177 UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift, 1178 uspi->s_fshift); 1179 uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift); 1180 uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb); 1181 /* s_sbsize already set */ 1182 uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask); 1183 uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift); 1184 uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir); 1185 uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb); 1186 uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf); 1187 uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3); 1188 uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave); 1189 uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew); 1190 1191 if (uspi->fs_magic == UFS2_MAGIC) 1192 uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr); 1193 else 1194 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr); 1195 1196 uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize); 1197 uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize); 1198 uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak); 1199 uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect); 1200 uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc); 1201 uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg); 1202 uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg); 1203 uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc); 1204 uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize); 1205 uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3); 1206 uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3); 1207 uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos); 1208 uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff); 1209 uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff); 1210 1211 uspi->s_root_blocks = mul_u64_u32_div(uspi->s_dsize, 1212 uspi->s_minfree, 100); 1213 if (uspi->s_minfree <= 5) { 1214 uspi->s_time_to_space = ~0ULL; 1215 uspi->s_space_to_time = 0; 1216 usb1->fs_optim = cpu_to_fs32(sb, UFS_OPTSPACE); 1217 } else { 1218 uspi->s_time_to_space = (uspi->s_root_blocks / 2) + 1; 1219 uspi->s_space_to_time = mul_u64_u32_div(uspi->s_dsize, 1220 uspi->s_minfree - 2, 100) - 1; 1221 } 1222 1223 /* 1224 * Compute another frequently used values 1225 */ 1226 uspi->s_fpbmask = uspi->s_fpb - 1; 1227 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) 1228 uspi->s_apbshift = uspi->s_bshift - 3; 1229 else 1230 uspi->s_apbshift = uspi->s_bshift - 2; 1231 1232 uspi->s_2apbshift = uspi->s_apbshift * 2; 1233 uspi->s_3apbshift = uspi->s_apbshift * 3; 1234 uspi->s_apb = 1 << uspi->s_apbshift; 1235 uspi->s_2apb = 1 << uspi->s_2apbshift; 1236 uspi->s_3apb = 1 << uspi->s_3apbshift; 1237 uspi->s_apbmask = uspi->s_apb - 1; 1238 uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS; 1239 uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift; 1240 uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift; 1241 uspi->s_bpf = uspi->s_fsize << 3; 1242 uspi->s_bpfshift = uspi->s_fshift + 3; 1243 uspi->s_bpfmask = uspi->s_bpf - 1; 1244 if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_44BSD || 1245 (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_UFS2) 1246 uspi->s_maxsymlinklen = 1247 fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen); 1248 1249 if (uspi->fs_magic == UFS2_MAGIC) 1250 maxsymlen = 2 * 4 * (UFS_NDADDR + UFS_NINDIR); 1251 else 1252 maxsymlen = 4 * (UFS_NDADDR + UFS_NINDIR); 1253 if (uspi->s_maxsymlinklen > maxsymlen) { 1254 ufs_warning(sb, __func__, "ufs_read_super: excessive maximum " 1255 "fast symlink size (%u)\n", uspi->s_maxsymlinklen); 1256 uspi->s_maxsymlinklen = maxsymlen; 1257 } 1258 sb->s_maxbytes = ufs_max_bytes(sb); 1259 sb->s_max_links = UFS_LINK_MAX; 1260 1261 inode = ufs_iget(sb, UFS_ROOTINO); 1262 if (IS_ERR(inode)) { 1263 ret = PTR_ERR(inode); 1264 goto failed; 1265 } 1266 sb->s_root = d_make_root(inode); 1267 if (!sb->s_root) { 1268 ret = -ENOMEM; 1269 goto failed; 1270 } 1271 1272 ufs_setup_cstotal(sb); 1273 /* 1274 * Read cylinder group structures 1275 */ 1276 if (!(sb->s_flags & MS_RDONLY)) 1277 if (!ufs_read_cylinder_structures(sb)) 1278 goto failed; 1279 1280 UFSD("EXIT\n"); 1281 return 0; 1282 1283 failed: 1284 if (ubh) 1285 ubh_brelse_uspi (uspi); 1286 kfree (uspi); 1287 kfree(sbi); 1288 sb->s_fs_info = NULL; 1289 UFSD("EXIT (FAILED)\n"); 1290 return ret; 1291 1292 failed_nomem: 1293 UFSD("EXIT (NOMEM)\n"); 1294 return -ENOMEM; 1295 } 1296 1297 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data) 1298 { 1299 struct ufs_sb_private_info * uspi; 1300 struct ufs_super_block_first * usb1; 1301 struct ufs_super_block_third * usb3; 1302 unsigned new_mount_opt, ufstype; 1303 unsigned flags; 1304 1305 sync_filesystem(sb); 1306 mutex_lock(&UFS_SB(sb)->s_lock); 1307 uspi = UFS_SB(sb)->s_uspi; 1308 flags = UFS_SB(sb)->s_flags; 1309 usb1 = ubh_get_usb_first(uspi); 1310 usb3 = ubh_get_usb_third(uspi); 1311 1312 /* 1313 * Allow the "check" option to be passed as a remount option. 1314 * It is not possible to change ufstype option during remount 1315 */ 1316 ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE; 1317 new_mount_opt = 0; 1318 ufs_set_opt (new_mount_opt, ONERROR_LOCK); 1319 if (!ufs_parse_options (data, &new_mount_opt)) { 1320 mutex_unlock(&UFS_SB(sb)->s_lock); 1321 return -EINVAL; 1322 } 1323 if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) { 1324 new_mount_opt |= ufstype; 1325 } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) { 1326 pr_err("ufstype can't be changed during remount\n"); 1327 mutex_unlock(&UFS_SB(sb)->s_lock); 1328 return -EINVAL; 1329 } 1330 1331 if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) { 1332 UFS_SB(sb)->s_mount_opt = new_mount_opt; 1333 mutex_unlock(&UFS_SB(sb)->s_lock); 1334 return 0; 1335 } 1336 1337 /* 1338 * fs was mouted as rw, remounting ro 1339 */ 1340 if (*mount_flags & MS_RDONLY) { 1341 ufs_put_super_internal(sb); 1342 usb1->fs_time = cpu_to_fs32(sb, get_seconds()); 1343 if ((flags & UFS_ST_MASK) == UFS_ST_SUN 1344 || (flags & UFS_ST_MASK) == UFS_ST_SUNOS 1345 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86) 1346 ufs_set_fs_state(sb, usb1, usb3, 1347 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time)); 1348 ubh_mark_buffer_dirty (USPI_UBH(uspi)); 1349 sb->s_flags |= MS_RDONLY; 1350 } else { 1351 /* 1352 * fs was mounted as ro, remounting rw 1353 */ 1354 #ifndef CONFIG_UFS_FS_WRITE 1355 pr_err("ufs was compiled with read-only support, can't be mounted as read-write\n"); 1356 mutex_unlock(&UFS_SB(sb)->s_lock); 1357 return -EINVAL; 1358 #else 1359 if (ufstype != UFS_MOUNT_UFSTYPE_SUN && 1360 ufstype != UFS_MOUNT_UFSTYPE_SUNOS && 1361 ufstype != UFS_MOUNT_UFSTYPE_44BSD && 1362 ufstype != UFS_MOUNT_UFSTYPE_SUNx86 && 1363 ufstype != UFS_MOUNT_UFSTYPE_UFS2) { 1364 pr_err("this ufstype is read-only supported\n"); 1365 mutex_unlock(&UFS_SB(sb)->s_lock); 1366 return -EINVAL; 1367 } 1368 if (!ufs_read_cylinder_structures(sb)) { 1369 pr_err("failed during remounting\n"); 1370 mutex_unlock(&UFS_SB(sb)->s_lock); 1371 return -EPERM; 1372 } 1373 sb->s_flags &= ~MS_RDONLY; 1374 #endif 1375 } 1376 UFS_SB(sb)->s_mount_opt = new_mount_opt; 1377 mutex_unlock(&UFS_SB(sb)->s_lock); 1378 return 0; 1379 } 1380 1381 static int ufs_show_options(struct seq_file *seq, struct dentry *root) 1382 { 1383 struct ufs_sb_info *sbi = UFS_SB(root->d_sb); 1384 unsigned mval = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE; 1385 const struct match_token *tp = tokens; 1386 1387 while (tp->token != Opt_onerror_panic && tp->token != mval) 1388 ++tp; 1389 BUG_ON(tp->token == Opt_onerror_panic); 1390 seq_printf(seq, ",%s", tp->pattern); 1391 1392 mval = sbi->s_mount_opt & UFS_MOUNT_ONERROR; 1393 while (tp->token != Opt_err && tp->token != mval) 1394 ++tp; 1395 BUG_ON(tp->token == Opt_err); 1396 seq_printf(seq, ",%s", tp->pattern); 1397 1398 return 0; 1399 } 1400 1401 static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf) 1402 { 1403 struct super_block *sb = dentry->d_sb; 1404 struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi; 1405 unsigned flags = UFS_SB(sb)->s_flags; 1406 struct ufs_super_block_third *usb3; 1407 u64 id = huge_encode_dev(sb->s_bdev->bd_dev); 1408 1409 mutex_lock(&UFS_SB(sb)->s_lock); 1410 usb3 = ubh_get_usb_third(uspi); 1411 1412 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) 1413 buf->f_type = UFS2_MAGIC; 1414 else 1415 buf->f_type = UFS_MAGIC; 1416 1417 buf->f_blocks = uspi->s_dsize; 1418 buf->f_bfree = ufs_freefrags(uspi); 1419 buf->f_ffree = uspi->cs_total.cs_nifree; 1420 buf->f_bsize = sb->s_blocksize; 1421 buf->f_bavail = (buf->f_bfree > uspi->s_root_blocks) 1422 ? (buf->f_bfree - uspi->s_root_blocks) : 0; 1423 buf->f_files = uspi->s_ncg * uspi->s_ipg; 1424 buf->f_namelen = UFS_MAXNAMLEN; 1425 buf->f_fsid.val[0] = (u32)id; 1426 buf->f_fsid.val[1] = (u32)(id >> 32); 1427 1428 mutex_unlock(&UFS_SB(sb)->s_lock); 1429 1430 return 0; 1431 } 1432 1433 static struct kmem_cache * ufs_inode_cachep; 1434 1435 static struct inode *ufs_alloc_inode(struct super_block *sb) 1436 { 1437 struct ufs_inode_info *ei; 1438 1439 ei = kmem_cache_alloc(ufs_inode_cachep, GFP_NOFS); 1440 if (!ei) 1441 return NULL; 1442 1443 ei->vfs_inode.i_version = 1; 1444 seqlock_init(&ei->meta_lock); 1445 mutex_init(&ei->truncate_mutex); 1446 return &ei->vfs_inode; 1447 } 1448 1449 static void ufs_i_callback(struct rcu_head *head) 1450 { 1451 struct inode *inode = container_of(head, struct inode, i_rcu); 1452 kmem_cache_free(ufs_inode_cachep, UFS_I(inode)); 1453 } 1454 1455 static void ufs_destroy_inode(struct inode *inode) 1456 { 1457 call_rcu(&inode->i_rcu, ufs_i_callback); 1458 } 1459 1460 static void init_once(void *foo) 1461 { 1462 struct ufs_inode_info *ei = (struct ufs_inode_info *) foo; 1463 1464 inode_init_once(&ei->vfs_inode); 1465 } 1466 1467 static int __init init_inodecache(void) 1468 { 1469 ufs_inode_cachep = kmem_cache_create("ufs_inode_cache", 1470 sizeof(struct ufs_inode_info), 1471 0, (SLAB_RECLAIM_ACCOUNT| 1472 SLAB_MEM_SPREAD|SLAB_ACCOUNT), 1473 init_once); 1474 if (ufs_inode_cachep == NULL) 1475 return -ENOMEM; 1476 return 0; 1477 } 1478 1479 static void destroy_inodecache(void) 1480 { 1481 /* 1482 * Make sure all delayed rcu free inodes are flushed before we 1483 * destroy cache. 1484 */ 1485 rcu_barrier(); 1486 kmem_cache_destroy(ufs_inode_cachep); 1487 } 1488 1489 static const struct super_operations ufs_super_ops = { 1490 .alloc_inode = ufs_alloc_inode, 1491 .destroy_inode = ufs_destroy_inode, 1492 .write_inode = ufs_write_inode, 1493 .evict_inode = ufs_evict_inode, 1494 .put_super = ufs_put_super, 1495 .sync_fs = ufs_sync_fs, 1496 .statfs = ufs_statfs, 1497 .remount_fs = ufs_remount, 1498 .show_options = ufs_show_options, 1499 }; 1500 1501 static struct dentry *ufs_mount(struct file_system_type *fs_type, 1502 int flags, const char *dev_name, void *data) 1503 { 1504 return mount_bdev(fs_type, flags, dev_name, data, ufs_fill_super); 1505 } 1506 1507 static struct file_system_type ufs_fs_type = { 1508 .owner = THIS_MODULE, 1509 .name = "ufs", 1510 .mount = ufs_mount, 1511 .kill_sb = kill_block_super, 1512 .fs_flags = FS_REQUIRES_DEV, 1513 }; 1514 MODULE_ALIAS_FS("ufs"); 1515 1516 static int __init init_ufs_fs(void) 1517 { 1518 int err = init_inodecache(); 1519 if (err) 1520 goto out1; 1521 err = register_filesystem(&ufs_fs_type); 1522 if (err) 1523 goto out; 1524 return 0; 1525 out: 1526 destroy_inodecache(); 1527 out1: 1528 return err; 1529 } 1530 1531 static void __exit exit_ufs_fs(void) 1532 { 1533 unregister_filesystem(&ufs_fs_type); 1534 destroy_inodecache(); 1535 } 1536 1537 module_init(init_ufs_fs) 1538 module_exit(exit_ufs_fs) 1539 MODULE_LICENSE("GPL"); 1540