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 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(d_inode(child)->i_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 (usb1->fs_flags & UFS_FLAGS_UPDATED)) || 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_44BSD && 600 (usb1->fs_flags & UFS_FLAGS_UPDATED)) || 601 mtype == UFS_MOUNT_UFSTYPE_UFS2) { 602 /*we have statistic in different place, then usual*/ 603 usb2->fs_un.fs_u2.cs_ndir = 604 cpu_to_fs64(sb, uspi->cs_total.cs_ndir); 605 usb2->fs_un.fs_u2.cs_nbfree = 606 cpu_to_fs64(sb, uspi->cs_total.cs_nbfree); 607 usb3->fs_un1.fs_u2.cs_nifree = 608 cpu_to_fs64(sb, uspi->cs_total.cs_nifree); 609 usb3->fs_un1.fs_u2.cs_nffree = 610 cpu_to_fs64(sb, uspi->cs_total.cs_nffree); 611 } else { 612 usb1->fs_cstotal.cs_ndir = 613 cpu_to_fs32(sb, uspi->cs_total.cs_ndir); 614 usb1->fs_cstotal.cs_nbfree = 615 cpu_to_fs32(sb, uspi->cs_total.cs_nbfree); 616 usb1->fs_cstotal.cs_nifree = 617 cpu_to_fs32(sb, uspi->cs_total.cs_nifree); 618 usb1->fs_cstotal.cs_nffree = 619 cpu_to_fs32(sb, uspi->cs_total.cs_nffree); 620 } 621 ubh_mark_buffer_dirty(USPI_UBH(uspi)); 622 ufs_print_super_stuff(sb, usb1, usb2, usb3); 623 UFSD("EXIT\n"); 624 } 625 626 /** 627 * ufs_put_super_internal() - put on-disk intrenal structures 628 * @sb: pointer to super_block structure 629 * Put on-disk structures associated with cylinder groups 630 * and write them back to disk, also update cs_total on disk 631 */ 632 static void ufs_put_super_internal(struct super_block *sb) 633 { 634 struct ufs_sb_info *sbi = UFS_SB(sb); 635 struct ufs_sb_private_info *uspi = sbi->s_uspi; 636 struct ufs_buffer_head * ubh; 637 unsigned char * base, * space; 638 unsigned blks, size, i; 639 640 641 UFSD("ENTER\n"); 642 643 ufs_put_cstotal(sb); 644 size = uspi->s_cssize; 645 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift; 646 base = space = (char*) sbi->s_csp; 647 for (i = 0; i < blks; i += uspi->s_fpb) { 648 size = uspi->s_bsize; 649 if (i + uspi->s_fpb > blks) 650 size = (blks - i) * uspi->s_fsize; 651 652 ubh = ubh_bread(sb, uspi->s_csaddr + i, size); 653 654 ubh_memcpyubh (ubh, space, size); 655 space += size; 656 ubh_mark_buffer_uptodate (ubh, 1); 657 ubh_mark_buffer_dirty (ubh); 658 ubh_brelse (ubh); 659 } 660 for (i = 0; i < sbi->s_cg_loaded; i++) { 661 ufs_put_cylinder (sb, i); 662 kfree (sbi->s_ucpi[i]); 663 } 664 for (; i < UFS_MAX_GROUP_LOADED; i++) 665 kfree (sbi->s_ucpi[i]); 666 for (i = 0; i < uspi->s_ncg; i++) 667 brelse (sbi->s_ucg[i]); 668 kfree (sbi->s_ucg); 669 kfree (base); 670 671 UFSD("EXIT\n"); 672 } 673 674 static int ufs_sync_fs(struct super_block *sb, int wait) 675 { 676 struct ufs_sb_private_info * uspi; 677 struct ufs_super_block_first * usb1; 678 struct ufs_super_block_third * usb3; 679 unsigned flags; 680 681 mutex_lock(&UFS_SB(sb)->s_lock); 682 683 UFSD("ENTER\n"); 684 685 flags = UFS_SB(sb)->s_flags; 686 uspi = UFS_SB(sb)->s_uspi; 687 usb1 = ubh_get_usb_first(uspi); 688 usb3 = ubh_get_usb_third(uspi); 689 690 usb1->fs_time = cpu_to_fs32(sb, get_seconds()); 691 if ((flags & UFS_ST_MASK) == UFS_ST_SUN || 692 (flags & UFS_ST_MASK) == UFS_ST_SUNOS || 693 (flags & UFS_ST_MASK) == UFS_ST_SUNx86) 694 ufs_set_fs_state(sb, usb1, usb3, 695 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time)); 696 ufs_put_cstotal(sb); 697 698 UFSD("EXIT\n"); 699 mutex_unlock(&UFS_SB(sb)->s_lock); 700 701 return 0; 702 } 703 704 static void delayed_sync_fs(struct work_struct *work) 705 { 706 struct ufs_sb_info *sbi; 707 708 sbi = container_of(work, struct ufs_sb_info, sync_work.work); 709 710 spin_lock(&sbi->work_lock); 711 sbi->work_queued = 0; 712 spin_unlock(&sbi->work_lock); 713 714 ufs_sync_fs(sbi->sb, 1); 715 } 716 717 void ufs_mark_sb_dirty(struct super_block *sb) 718 { 719 struct ufs_sb_info *sbi = UFS_SB(sb); 720 unsigned long delay; 721 722 spin_lock(&sbi->work_lock); 723 if (!sbi->work_queued) { 724 delay = msecs_to_jiffies(dirty_writeback_interval * 10); 725 queue_delayed_work(system_long_wq, &sbi->sync_work, delay); 726 sbi->work_queued = 1; 727 } 728 spin_unlock(&sbi->work_lock); 729 } 730 731 static void ufs_put_super(struct super_block *sb) 732 { 733 struct ufs_sb_info * sbi = UFS_SB(sb); 734 735 UFSD("ENTER\n"); 736 737 if (!(sb->s_flags & MS_RDONLY)) 738 ufs_put_super_internal(sb); 739 cancel_delayed_work_sync(&sbi->sync_work); 740 741 ubh_brelse_uspi (sbi->s_uspi); 742 kfree (sbi->s_uspi); 743 kfree (sbi); 744 sb->s_fs_info = NULL; 745 UFSD("EXIT\n"); 746 return; 747 } 748 749 static int ufs_fill_super(struct super_block *sb, void *data, int silent) 750 { 751 struct ufs_sb_info * sbi; 752 struct ufs_sb_private_info * uspi; 753 struct ufs_super_block_first * usb1; 754 struct ufs_super_block_second * usb2; 755 struct ufs_super_block_third * usb3; 756 struct ufs_buffer_head * ubh; 757 struct inode *inode; 758 unsigned block_size, super_block_size; 759 unsigned flags; 760 unsigned super_block_offset; 761 unsigned maxsymlen; 762 int ret = -EINVAL; 763 764 uspi = NULL; 765 ubh = NULL; 766 flags = 0; 767 768 UFSD("ENTER\n"); 769 770 #ifndef CONFIG_UFS_FS_WRITE 771 if (!(sb->s_flags & MS_RDONLY)) { 772 pr_err("ufs was compiled with read-only support, can't be mounted as read-write\n"); 773 return -EROFS; 774 } 775 #endif 776 777 sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL); 778 if (!sbi) 779 goto failed_nomem; 780 sb->s_fs_info = sbi; 781 sbi->sb = sb; 782 783 UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY)); 784 785 mutex_init(&sbi->s_lock); 786 spin_lock_init(&sbi->work_lock); 787 INIT_DELAYED_WORK(&sbi->sync_work, delayed_sync_fs); 788 /* 789 * Set default mount options 790 * Parse mount options 791 */ 792 sbi->s_mount_opt = 0; 793 ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK); 794 if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) { 795 pr_err("wrong mount options\n"); 796 goto failed; 797 } 798 if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) { 799 if (!silent) 800 pr_err("You didn't specify the type of your ufs filesystem\n\n" 801 "mount -t ufs -o ufstype=" 802 "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n" 803 ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, " 804 "default is ufstype=old\n"); 805 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD); 806 } 807 808 uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL); 809 sbi->s_uspi = uspi; 810 if (!uspi) 811 goto failed; 812 uspi->s_dirblksize = UFS_SECTOR_SIZE; 813 super_block_offset=UFS_SBLOCK; 814 815 /* Keep 2Gig file limit. Some UFS variants need to override 816 this but as I don't know which I'll let those in the know loosen 817 the rules */ 818 switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) { 819 case UFS_MOUNT_UFSTYPE_44BSD: 820 UFSD("ufstype=44bsd\n"); 821 uspi->s_fsize = block_size = 512; 822 uspi->s_fmask = ~(512 - 1); 823 uspi->s_fshift = 9; 824 uspi->s_sbsize = super_block_size = 1536; 825 uspi->s_sbbase = 0; 826 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; 827 break; 828 case UFS_MOUNT_UFSTYPE_UFS2: 829 UFSD("ufstype=ufs2\n"); 830 super_block_offset=SBLOCK_UFS2; 831 uspi->s_fsize = block_size = 512; 832 uspi->s_fmask = ~(512 - 1); 833 uspi->s_fshift = 9; 834 uspi->s_sbsize = super_block_size = 1536; 835 uspi->s_sbbase = 0; 836 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; 837 break; 838 839 case UFS_MOUNT_UFSTYPE_SUN: 840 UFSD("ufstype=sun\n"); 841 uspi->s_fsize = block_size = 1024; 842 uspi->s_fmask = ~(1024 - 1); 843 uspi->s_fshift = 10; 844 uspi->s_sbsize = super_block_size = 2048; 845 uspi->s_sbbase = 0; 846 uspi->s_maxsymlinklen = 0; /* Not supported on disk */ 847 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN; 848 break; 849 850 case UFS_MOUNT_UFSTYPE_SUNOS: 851 UFSD("ufstype=sunos\n"); 852 uspi->s_fsize = block_size = 1024; 853 uspi->s_fmask = ~(1024 - 1); 854 uspi->s_fshift = 10; 855 uspi->s_sbsize = 2048; 856 super_block_size = 2048; 857 uspi->s_sbbase = 0; 858 uspi->s_maxsymlinklen = 0; /* Not supported on disk */ 859 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_SUNOS | UFS_CG_SUN; 860 break; 861 862 case UFS_MOUNT_UFSTYPE_SUNx86: 863 UFSD("ufstype=sunx86\n"); 864 uspi->s_fsize = block_size = 1024; 865 uspi->s_fmask = ~(1024 - 1); 866 uspi->s_fshift = 10; 867 uspi->s_sbsize = super_block_size = 2048; 868 uspi->s_sbbase = 0; 869 uspi->s_maxsymlinklen = 0; /* Not supported on disk */ 870 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN; 871 break; 872 873 case UFS_MOUNT_UFSTYPE_OLD: 874 UFSD("ufstype=old\n"); 875 uspi->s_fsize = block_size = 1024; 876 uspi->s_fmask = ~(1024 - 1); 877 uspi->s_fshift = 10; 878 uspi->s_sbsize = super_block_size = 2048; 879 uspi->s_sbbase = 0; 880 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 881 if (!(sb->s_flags & MS_RDONLY)) { 882 if (!silent) 883 pr_info("ufstype=old is supported read-only\n"); 884 sb->s_flags |= MS_RDONLY; 885 } 886 break; 887 888 case UFS_MOUNT_UFSTYPE_NEXTSTEP: 889 UFSD("ufstype=nextstep\n"); 890 uspi->s_fsize = block_size = 1024; 891 uspi->s_fmask = ~(1024 - 1); 892 uspi->s_fshift = 10; 893 uspi->s_sbsize = super_block_size = 2048; 894 uspi->s_sbbase = 0; 895 uspi->s_dirblksize = 1024; 896 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 897 if (!(sb->s_flags & MS_RDONLY)) { 898 if (!silent) 899 pr_info("ufstype=nextstep is supported read-only\n"); 900 sb->s_flags |= MS_RDONLY; 901 } 902 break; 903 904 case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD: 905 UFSD("ufstype=nextstep-cd\n"); 906 uspi->s_fsize = block_size = 2048; 907 uspi->s_fmask = ~(2048 - 1); 908 uspi->s_fshift = 11; 909 uspi->s_sbsize = super_block_size = 2048; 910 uspi->s_sbbase = 0; 911 uspi->s_dirblksize = 1024; 912 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 913 if (!(sb->s_flags & MS_RDONLY)) { 914 if (!silent) 915 pr_info("ufstype=nextstep-cd is supported read-only\n"); 916 sb->s_flags |= MS_RDONLY; 917 } 918 break; 919 920 case UFS_MOUNT_UFSTYPE_OPENSTEP: 921 UFSD("ufstype=openstep\n"); 922 uspi->s_fsize = block_size = 1024; 923 uspi->s_fmask = ~(1024 - 1); 924 uspi->s_fshift = 10; 925 uspi->s_sbsize = super_block_size = 2048; 926 uspi->s_sbbase = 0; 927 uspi->s_dirblksize = 1024; 928 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; 929 if (!(sb->s_flags & MS_RDONLY)) { 930 if (!silent) 931 pr_info("ufstype=openstep is supported read-only\n"); 932 sb->s_flags |= MS_RDONLY; 933 } 934 break; 935 936 case UFS_MOUNT_UFSTYPE_HP: 937 UFSD("ufstype=hp\n"); 938 uspi->s_fsize = block_size = 1024; 939 uspi->s_fmask = ~(1024 - 1); 940 uspi->s_fshift = 10; 941 uspi->s_sbsize = super_block_size = 2048; 942 uspi->s_sbbase = 0; 943 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 944 if (!(sb->s_flags & MS_RDONLY)) { 945 if (!silent) 946 pr_info("ufstype=hp is supported read-only\n"); 947 sb->s_flags |= MS_RDONLY; 948 } 949 break; 950 default: 951 if (!silent) 952 pr_err("unknown ufstype\n"); 953 goto failed; 954 } 955 956 again: 957 if (!sb_set_blocksize(sb, block_size)) { 958 pr_err("failed to set blocksize\n"); 959 goto failed; 960 } 961 962 /* 963 * read ufs super block from device 964 */ 965 966 ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size); 967 968 if (!ubh) 969 goto failed; 970 971 usb1 = ubh_get_usb_first(uspi); 972 usb2 = ubh_get_usb_second(uspi); 973 usb3 = ubh_get_usb_third(uspi); 974 975 /* Sort out mod used on SunOS 4.1.3 for fs_state */ 976 uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat); 977 if (((flags & UFS_ST_MASK) == UFS_ST_SUNOS) && 978 (uspi->s_postblformat != UFS_42POSTBLFMT)) { 979 flags &= ~UFS_ST_MASK; 980 flags |= UFS_ST_SUN; 981 } 982 983 /* 984 * Check ufs magic number 985 */ 986 sbi->s_bytesex = BYTESEX_LE; 987 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) { 988 case UFS_MAGIC: 989 case UFS_MAGIC_BW: 990 case UFS2_MAGIC: 991 case UFS_MAGIC_LFN: 992 case UFS_MAGIC_FEA: 993 case UFS_MAGIC_4GB: 994 goto magic_found; 995 } 996 sbi->s_bytesex = BYTESEX_BE; 997 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) { 998 case UFS_MAGIC: 999 case UFS_MAGIC_BW: 1000 case UFS2_MAGIC: 1001 case UFS_MAGIC_LFN: 1002 case UFS_MAGIC_FEA: 1003 case UFS_MAGIC_4GB: 1004 goto magic_found; 1005 } 1006 1007 if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP) 1008 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD) 1009 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP)) 1010 && uspi->s_sbbase < 256) { 1011 ubh_brelse_uspi(uspi); 1012 ubh = NULL; 1013 uspi->s_sbbase += 8; 1014 goto again; 1015 } 1016 if (!silent) 1017 pr_err("%s(): bad magic number\n", __func__); 1018 goto failed; 1019 1020 magic_found: 1021 /* 1022 * Check block and fragment sizes 1023 */ 1024 uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize); 1025 uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize); 1026 uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize); 1027 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask); 1028 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift); 1029 1030 if (!is_power_of_2(uspi->s_fsize)) { 1031 pr_err("%s(): fragment size %u is not a power of 2\n", 1032 __func__, uspi->s_fsize); 1033 goto failed; 1034 } 1035 if (uspi->s_fsize < 512) { 1036 pr_err("%s(): fragment size %u is too small\n", 1037 __func__, uspi->s_fsize); 1038 goto failed; 1039 } 1040 if (uspi->s_fsize > 4096) { 1041 pr_err("%s(): fragment size %u is too large\n", 1042 __func__, uspi->s_fsize); 1043 goto failed; 1044 } 1045 if (!is_power_of_2(uspi->s_bsize)) { 1046 pr_err("%s(): block size %u is not a power of 2\n", 1047 __func__, uspi->s_bsize); 1048 goto failed; 1049 } 1050 if (uspi->s_bsize < 4096) { 1051 pr_err("%s(): block size %u is too small\n", 1052 __func__, uspi->s_bsize); 1053 goto failed; 1054 } 1055 if (uspi->s_bsize / uspi->s_fsize > 8) { 1056 pr_err("%s(): too many fragments per block (%u)\n", 1057 __func__, uspi->s_bsize / uspi->s_fsize); 1058 goto failed; 1059 } 1060 if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) { 1061 ubh_brelse_uspi(uspi); 1062 ubh = NULL; 1063 block_size = uspi->s_fsize; 1064 super_block_size = uspi->s_sbsize; 1065 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size); 1066 goto again; 1067 } 1068 1069 sbi->s_flags = flags;/*after that line some functions use s_flags*/ 1070 ufs_print_super_stuff(sb, usb1, usb2, usb3); 1071 1072 /* 1073 * Check, if file system was correctly unmounted. 1074 * If not, make it read only. 1075 */ 1076 if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) || 1077 ((flags & UFS_ST_MASK) == UFS_ST_OLD) || 1078 (((flags & UFS_ST_MASK) == UFS_ST_SUN || 1079 (flags & UFS_ST_MASK) == UFS_ST_SUNOS || 1080 (flags & UFS_ST_MASK) == UFS_ST_SUNx86) && 1081 (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) { 1082 switch(usb1->fs_clean) { 1083 case UFS_FSCLEAN: 1084 UFSD("fs is clean\n"); 1085 break; 1086 case UFS_FSSTABLE: 1087 UFSD("fs is stable\n"); 1088 break; 1089 case UFS_FSLOG: 1090 UFSD("fs is logging fs\n"); 1091 break; 1092 case UFS_FSOSF1: 1093 UFSD("fs is DEC OSF/1\n"); 1094 break; 1095 case UFS_FSACTIVE: 1096 pr_err("%s(): fs is active\n", __func__); 1097 sb->s_flags |= MS_RDONLY; 1098 break; 1099 case UFS_FSBAD: 1100 pr_err("%s(): fs is bad\n", __func__); 1101 sb->s_flags |= MS_RDONLY; 1102 break; 1103 default: 1104 pr_err("%s(): can't grok fs_clean 0x%x\n", 1105 __func__, usb1->fs_clean); 1106 sb->s_flags |= MS_RDONLY; 1107 break; 1108 } 1109 } else { 1110 pr_err("%s(): fs needs fsck\n", __func__); 1111 sb->s_flags |= MS_RDONLY; 1112 } 1113 1114 /* 1115 * Read ufs_super_block into internal data structures 1116 */ 1117 sb->s_op = &ufs_super_ops; 1118 sb->s_export_op = &ufs_export_ops; 1119 1120 sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic); 1121 1122 uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno); 1123 uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno); 1124 uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno); 1125 uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno); 1126 uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset); 1127 uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask); 1128 1129 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { 1130 uspi->s_u2_size = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size); 1131 uspi->s_u2_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize); 1132 } else { 1133 uspi->s_size = fs32_to_cpu(sb, usb1->fs_size); 1134 uspi->s_dsize = fs32_to_cpu(sb, usb1->fs_dsize); 1135 } 1136 1137 uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg); 1138 /* s_bsize already set */ 1139 /* s_fsize already set */ 1140 uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag); 1141 uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree); 1142 uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask); 1143 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask); 1144 uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift); 1145 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift); 1146 UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift, 1147 uspi->s_fshift); 1148 uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift); 1149 uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb); 1150 /* s_sbsize already set */ 1151 uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask); 1152 uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift); 1153 uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir); 1154 uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb); 1155 uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf); 1156 uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3); 1157 uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave); 1158 uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew); 1159 1160 if (uspi->fs_magic == UFS2_MAGIC) 1161 uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr); 1162 else 1163 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr); 1164 1165 uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize); 1166 uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize); 1167 uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak); 1168 uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect); 1169 uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc); 1170 uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg); 1171 uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg); 1172 uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc); 1173 uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize); 1174 uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3); 1175 uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3); 1176 uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos); 1177 uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff); 1178 uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff); 1179 1180 /* 1181 * Compute another frequently used values 1182 */ 1183 uspi->s_fpbmask = uspi->s_fpb - 1; 1184 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) 1185 uspi->s_apbshift = uspi->s_bshift - 3; 1186 else 1187 uspi->s_apbshift = uspi->s_bshift - 2; 1188 1189 uspi->s_2apbshift = uspi->s_apbshift * 2; 1190 uspi->s_3apbshift = uspi->s_apbshift * 3; 1191 uspi->s_apb = 1 << uspi->s_apbshift; 1192 uspi->s_2apb = 1 << uspi->s_2apbshift; 1193 uspi->s_3apb = 1 << uspi->s_3apbshift; 1194 uspi->s_apbmask = uspi->s_apb - 1; 1195 uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS; 1196 uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift; 1197 uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift; 1198 uspi->s_bpf = uspi->s_fsize << 3; 1199 uspi->s_bpfshift = uspi->s_fshift + 3; 1200 uspi->s_bpfmask = uspi->s_bpf - 1; 1201 if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_44BSD || 1202 (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_UFS2) 1203 uspi->s_maxsymlinklen = 1204 fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen); 1205 1206 if (uspi->fs_magic == UFS2_MAGIC) 1207 maxsymlen = 2 * 4 * (UFS_NDADDR + UFS_NINDIR); 1208 else 1209 maxsymlen = 4 * (UFS_NDADDR + UFS_NINDIR); 1210 if (uspi->s_maxsymlinklen > maxsymlen) { 1211 ufs_warning(sb, __func__, "ufs_read_super: excessive maximum " 1212 "fast symlink size (%u)\n", uspi->s_maxsymlinklen); 1213 uspi->s_maxsymlinklen = maxsymlen; 1214 } 1215 sb->s_max_links = UFS_LINK_MAX; 1216 1217 inode = ufs_iget(sb, UFS_ROOTINO); 1218 if (IS_ERR(inode)) { 1219 ret = PTR_ERR(inode); 1220 goto failed; 1221 } 1222 sb->s_root = d_make_root(inode); 1223 if (!sb->s_root) { 1224 ret = -ENOMEM; 1225 goto failed; 1226 } 1227 1228 ufs_setup_cstotal(sb); 1229 /* 1230 * Read cylinder group structures 1231 */ 1232 if (!(sb->s_flags & MS_RDONLY)) 1233 if (!ufs_read_cylinder_structures(sb)) 1234 goto failed; 1235 1236 UFSD("EXIT\n"); 1237 return 0; 1238 1239 failed: 1240 if (ubh) 1241 ubh_brelse_uspi (uspi); 1242 kfree (uspi); 1243 kfree(sbi); 1244 sb->s_fs_info = NULL; 1245 UFSD("EXIT (FAILED)\n"); 1246 return ret; 1247 1248 failed_nomem: 1249 UFSD("EXIT (NOMEM)\n"); 1250 return -ENOMEM; 1251 } 1252 1253 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data) 1254 { 1255 struct ufs_sb_private_info * uspi; 1256 struct ufs_super_block_first * usb1; 1257 struct ufs_super_block_third * usb3; 1258 unsigned new_mount_opt, ufstype; 1259 unsigned flags; 1260 1261 sync_filesystem(sb); 1262 mutex_lock(&UFS_SB(sb)->s_lock); 1263 uspi = UFS_SB(sb)->s_uspi; 1264 flags = UFS_SB(sb)->s_flags; 1265 usb1 = ubh_get_usb_first(uspi); 1266 usb3 = ubh_get_usb_third(uspi); 1267 1268 /* 1269 * Allow the "check" option to be passed as a remount option. 1270 * It is not possible to change ufstype option during remount 1271 */ 1272 ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE; 1273 new_mount_opt = 0; 1274 ufs_set_opt (new_mount_opt, ONERROR_LOCK); 1275 if (!ufs_parse_options (data, &new_mount_opt)) { 1276 mutex_unlock(&UFS_SB(sb)->s_lock); 1277 return -EINVAL; 1278 } 1279 if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) { 1280 new_mount_opt |= ufstype; 1281 } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) { 1282 pr_err("ufstype can't be changed during remount\n"); 1283 mutex_unlock(&UFS_SB(sb)->s_lock); 1284 return -EINVAL; 1285 } 1286 1287 if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) { 1288 UFS_SB(sb)->s_mount_opt = new_mount_opt; 1289 mutex_unlock(&UFS_SB(sb)->s_lock); 1290 return 0; 1291 } 1292 1293 /* 1294 * fs was mouted as rw, remounting ro 1295 */ 1296 if (*mount_flags & MS_RDONLY) { 1297 ufs_put_super_internal(sb); 1298 usb1->fs_time = cpu_to_fs32(sb, get_seconds()); 1299 if ((flags & UFS_ST_MASK) == UFS_ST_SUN 1300 || (flags & UFS_ST_MASK) == UFS_ST_SUNOS 1301 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86) 1302 ufs_set_fs_state(sb, usb1, usb3, 1303 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time)); 1304 ubh_mark_buffer_dirty (USPI_UBH(uspi)); 1305 sb->s_flags |= MS_RDONLY; 1306 } else { 1307 /* 1308 * fs was mounted as ro, remounting rw 1309 */ 1310 #ifndef CONFIG_UFS_FS_WRITE 1311 pr_err("ufs was compiled with read-only support, can't be mounted as read-write\n"); 1312 mutex_unlock(&UFS_SB(sb)->s_lock); 1313 return -EINVAL; 1314 #else 1315 if (ufstype != UFS_MOUNT_UFSTYPE_SUN && 1316 ufstype != UFS_MOUNT_UFSTYPE_SUNOS && 1317 ufstype != UFS_MOUNT_UFSTYPE_44BSD && 1318 ufstype != UFS_MOUNT_UFSTYPE_SUNx86 && 1319 ufstype != UFS_MOUNT_UFSTYPE_UFS2) { 1320 pr_err("this ufstype is read-only supported\n"); 1321 mutex_unlock(&UFS_SB(sb)->s_lock); 1322 return -EINVAL; 1323 } 1324 if (!ufs_read_cylinder_structures(sb)) { 1325 pr_err("failed during remounting\n"); 1326 mutex_unlock(&UFS_SB(sb)->s_lock); 1327 return -EPERM; 1328 } 1329 sb->s_flags &= ~MS_RDONLY; 1330 #endif 1331 } 1332 UFS_SB(sb)->s_mount_opt = new_mount_opt; 1333 mutex_unlock(&UFS_SB(sb)->s_lock); 1334 return 0; 1335 } 1336 1337 static int ufs_show_options(struct seq_file *seq, struct dentry *root) 1338 { 1339 struct ufs_sb_info *sbi = UFS_SB(root->d_sb); 1340 unsigned mval = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE; 1341 const struct match_token *tp = tokens; 1342 1343 while (tp->token != Opt_onerror_panic && tp->token != mval) 1344 ++tp; 1345 BUG_ON(tp->token == Opt_onerror_panic); 1346 seq_printf(seq, ",%s", tp->pattern); 1347 1348 mval = sbi->s_mount_opt & UFS_MOUNT_ONERROR; 1349 while (tp->token != Opt_err && tp->token != mval) 1350 ++tp; 1351 BUG_ON(tp->token == Opt_err); 1352 seq_printf(seq, ",%s", tp->pattern); 1353 1354 return 0; 1355 } 1356 1357 static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf) 1358 { 1359 struct super_block *sb = dentry->d_sb; 1360 struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi; 1361 unsigned flags = UFS_SB(sb)->s_flags; 1362 struct ufs_super_block_third *usb3; 1363 u64 id = huge_encode_dev(sb->s_bdev->bd_dev); 1364 1365 mutex_lock(&UFS_SB(sb)->s_lock); 1366 usb3 = ubh_get_usb_third(uspi); 1367 1368 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { 1369 buf->f_type = UFS2_MAGIC; 1370 buf->f_blocks = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize); 1371 } else { 1372 buf->f_type = UFS_MAGIC; 1373 buf->f_blocks = uspi->s_dsize; 1374 } 1375 buf->f_bfree = ufs_blkstofrags(uspi->cs_total.cs_nbfree) + 1376 uspi->cs_total.cs_nffree; 1377 buf->f_ffree = uspi->cs_total.cs_nifree; 1378 buf->f_bsize = sb->s_blocksize; 1379 buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree)) 1380 ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0; 1381 buf->f_files = uspi->s_ncg * uspi->s_ipg; 1382 buf->f_namelen = UFS_MAXNAMLEN; 1383 buf->f_fsid.val[0] = (u32)id; 1384 buf->f_fsid.val[1] = (u32)(id >> 32); 1385 1386 mutex_unlock(&UFS_SB(sb)->s_lock); 1387 1388 return 0; 1389 } 1390 1391 static struct kmem_cache * ufs_inode_cachep; 1392 1393 static struct inode *ufs_alloc_inode(struct super_block *sb) 1394 { 1395 struct ufs_inode_info *ei; 1396 1397 ei = kmem_cache_alloc(ufs_inode_cachep, GFP_NOFS); 1398 if (!ei) 1399 return NULL; 1400 1401 ei->vfs_inode.i_version = 1; 1402 seqlock_init(&ei->meta_lock); 1403 mutex_init(&ei->truncate_mutex); 1404 return &ei->vfs_inode; 1405 } 1406 1407 static void ufs_i_callback(struct rcu_head *head) 1408 { 1409 struct inode *inode = container_of(head, struct inode, i_rcu); 1410 kmem_cache_free(ufs_inode_cachep, UFS_I(inode)); 1411 } 1412 1413 static void ufs_destroy_inode(struct inode *inode) 1414 { 1415 call_rcu(&inode->i_rcu, ufs_i_callback); 1416 } 1417 1418 static void init_once(void *foo) 1419 { 1420 struct ufs_inode_info *ei = (struct ufs_inode_info *) foo; 1421 1422 inode_init_once(&ei->vfs_inode); 1423 } 1424 1425 static int __init init_inodecache(void) 1426 { 1427 ufs_inode_cachep = kmem_cache_create("ufs_inode_cache", 1428 sizeof(struct ufs_inode_info), 1429 0, (SLAB_RECLAIM_ACCOUNT| 1430 SLAB_MEM_SPREAD), 1431 init_once); 1432 if (ufs_inode_cachep == NULL) 1433 return -ENOMEM; 1434 return 0; 1435 } 1436 1437 static void destroy_inodecache(void) 1438 { 1439 /* 1440 * Make sure all delayed rcu free inodes are flushed before we 1441 * destroy cache. 1442 */ 1443 rcu_barrier(); 1444 kmem_cache_destroy(ufs_inode_cachep); 1445 } 1446 1447 static const struct super_operations ufs_super_ops = { 1448 .alloc_inode = ufs_alloc_inode, 1449 .destroy_inode = ufs_destroy_inode, 1450 .write_inode = ufs_write_inode, 1451 .evict_inode = ufs_evict_inode, 1452 .put_super = ufs_put_super, 1453 .sync_fs = ufs_sync_fs, 1454 .statfs = ufs_statfs, 1455 .remount_fs = ufs_remount, 1456 .show_options = ufs_show_options, 1457 }; 1458 1459 static struct dentry *ufs_mount(struct file_system_type *fs_type, 1460 int flags, const char *dev_name, void *data) 1461 { 1462 return mount_bdev(fs_type, flags, dev_name, data, ufs_fill_super); 1463 } 1464 1465 static struct file_system_type ufs_fs_type = { 1466 .owner = THIS_MODULE, 1467 .name = "ufs", 1468 .mount = ufs_mount, 1469 .kill_sb = kill_block_super, 1470 .fs_flags = FS_REQUIRES_DEV, 1471 }; 1472 MODULE_ALIAS_FS("ufs"); 1473 1474 static int __init init_ufs_fs(void) 1475 { 1476 int err = init_inodecache(); 1477 if (err) 1478 goto out1; 1479 err = register_filesystem(&ufs_fs_type); 1480 if (err) 1481 goto out; 1482 return 0; 1483 out: 1484 destroy_inodecache(); 1485 out1: 1486 return err; 1487 } 1488 1489 static void __exit exit_ufs_fs(void) 1490 { 1491 unregister_filesystem(&ufs_fs_type); 1492 destroy_inodecache(); 1493 } 1494 1495 module_init(init_ufs_fs) 1496 module_exit(exit_ufs_fs) 1497 MODULE_LICENSE("GPL"); 1498