1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * linux/fs/ufs/super.c 4 * 5 * Copyright (C) 1998 6 * Daniel Pirkl <daniel.pirkl@email.cz> 7 * Charles University, Faculty of Mathematics and Physics 8 */ 9 10 /* Derived from 11 * 12 * linux/fs/ext2/super.c 13 * 14 * Copyright (C) 1992, 1993, 1994, 1995 15 * Remy Card (card@masi.ibp.fr) 16 * Laboratoire MASI - Institut Blaise Pascal 17 * Universite Pierre et Marie Curie (Paris VI) 18 * 19 * from 20 * 21 * linux/fs/minix/inode.c 22 * 23 * Copyright (C) 1991, 1992 Linus Torvalds 24 * 25 * Big-endian to little-endian byte-swapping/bitmaps by 26 * David S. Miller (davem@caip.rutgers.edu), 1995 27 */ 28 29 /* 30 * Inspired by 31 * 32 * linux/fs/ufs/super.c 33 * 34 * Copyright (C) 1996 35 * Adrian Rodriguez (adrian@franklins-tower.rutgers.edu) 36 * Laboratory for Computer Science Research Computing Facility 37 * Rutgers, The State University of New Jersey 38 * 39 * Copyright (C) 1996 Eddie C. Dost (ecd@skynet.be) 40 * 41 * Kernel module support added on 96/04/26 by 42 * Stefan Reinauer <stepan@home.culture.mipt.ru> 43 * 44 * Module usage counts added on 96/04/29 by 45 * Gertjan van Wingerde <gwingerde@gmail.com> 46 * 47 * Clean swab support on 19970406 by 48 * Francois-Rene Rideau <fare@tunes.org> 49 * 50 * 4.4BSD (FreeBSD) support added on February 1st 1998 by 51 * Niels Kristian Bech Jensen <nkbj@image.dk> partially based 52 * on code by Martin von Loewis <martin@mira.isdn.cs.tu-berlin.de>. 53 * 54 * NeXTstep support added on February 5th 1998 by 55 * Niels Kristian Bech Jensen <nkbj@image.dk>. 56 * 57 * write support Daniel Pirkl <daniel.pirkl@email.cz> 1998 58 * 59 * HP/UX hfs filesystem support added by 60 * Martin K. Petersen <mkp@mkp.net>, August 1999 61 * 62 * UFS2 (of FreeBSD 5.x) support added by 63 * Niraj Kumar <niraj17@iitbombay.org>, Jan 2004 64 * 65 * UFS2 write support added by 66 * Evgeniy Dushistov <dushistov@mail.ru>, 2007 67 */ 68 69 #include <linux/exportfs.h> 70 #include <linux/module.h> 71 #include <linux/bitops.h> 72 73 #include <linux/stdarg.h> 74 75 #include <linux/uaccess.h> 76 77 #include <linux/errno.h> 78 #include <linux/fs.h> 79 #include <linux/slab.h> 80 #include <linux/time.h> 81 #include <linux/stat.h> 82 #include <linux/string.h> 83 #include <linux/blkdev.h> 84 #include <linux/backing-dev.h> 85 #include <linux/init.h> 86 #include <linux/parser.h> 87 #include <linux/buffer_head.h> 88 #include <linux/vfs.h> 89 #include <linux/log2.h> 90 #include <linux/mount.h> 91 #include <linux/seq_file.h> 92 #include <linux/iversion.h> 93 94 #include "ufs_fs.h" 95 #include "ufs.h" 96 #include "swab.h" 97 #include "util.h" 98 99 static struct inode *ufs_nfs_get_inode(struct super_block *sb, u64 ino, u32 generation) 100 { 101 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 102 struct inode *inode; 103 104 if (ino < UFS_ROOTINO || ino > (u64)uspi->s_ncg * uspi->s_ipg) 105 return ERR_PTR(-ESTALE); 106 107 inode = ufs_iget(sb, ino); 108 if (IS_ERR(inode)) 109 return ERR_CAST(inode); 110 if (generation && inode->i_generation != generation) { 111 iput(inode); 112 return ERR_PTR(-ESTALE); 113 } 114 return inode; 115 } 116 117 static struct dentry *ufs_fh_to_dentry(struct super_block *sb, struct fid *fid, 118 int fh_len, int fh_type) 119 { 120 return generic_fh_to_dentry(sb, fid, fh_len, fh_type, ufs_nfs_get_inode); 121 } 122 123 static struct dentry *ufs_fh_to_parent(struct super_block *sb, struct fid *fid, 124 int fh_len, int fh_type) 125 { 126 return generic_fh_to_parent(sb, fid, fh_len, fh_type, ufs_nfs_get_inode); 127 } 128 129 static struct dentry *ufs_get_parent(struct dentry *child) 130 { 131 ino_t ino; 132 133 ino = ufs_inode_by_name(d_inode(child), &dotdot_name); 134 if (!ino) 135 return ERR_PTR(-ENOENT); 136 return d_obtain_alias(ufs_iget(child->d_sb, ino)); 137 } 138 139 static const struct export_operations ufs_export_ops = { 140 .fh_to_dentry = ufs_fh_to_dentry, 141 .fh_to_parent = ufs_fh_to_parent, 142 .get_parent = ufs_get_parent, 143 }; 144 145 #ifdef CONFIG_UFS_DEBUG 146 /* 147 * Print contents of ufs_super_block, useful for debugging 148 */ 149 static void ufs_print_super_stuff(struct super_block *sb, 150 struct ufs_super_block_first *usb1, 151 struct ufs_super_block_second *usb2, 152 struct ufs_super_block_third *usb3) 153 { 154 u32 magic = fs32_to_cpu(sb, usb3->fs_magic); 155 156 pr_debug("ufs_print_super_stuff\n"); 157 pr_debug(" magic: 0x%x\n", magic); 158 if (fs32_to_cpu(sb, usb3->fs_magic) == UFS2_MAGIC) { 159 pr_debug(" fs_size: %llu\n", (unsigned long long) 160 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size)); 161 pr_debug(" fs_dsize: %llu\n", (unsigned long long) 162 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize)); 163 pr_debug(" bsize: %u\n", 164 fs32_to_cpu(sb, usb1->fs_bsize)); 165 pr_debug(" fsize: %u\n", 166 fs32_to_cpu(sb, usb1->fs_fsize)); 167 pr_debug(" fs_volname: %s\n", usb2->fs_un.fs_u2.fs_volname); 168 pr_debug(" fs_sblockloc: %llu\n", (unsigned long long) 169 fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc)); 170 pr_debug(" cs_ndir(No of dirs): %llu\n", (unsigned long long) 171 fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir)); 172 pr_debug(" cs_nbfree(No of free blocks): %llu\n", 173 (unsigned long long) 174 fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree)); 175 pr_info(" cs_nifree(Num of free inodes): %llu\n", 176 (unsigned long long) 177 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree)); 178 pr_info(" cs_nffree(Num of free frags): %llu\n", 179 (unsigned long long) 180 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree)); 181 pr_info(" fs_maxsymlinklen: %u\n", 182 fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen)); 183 } else { 184 pr_debug(" sblkno: %u\n", fs32_to_cpu(sb, usb1->fs_sblkno)); 185 pr_debug(" cblkno: %u\n", fs32_to_cpu(sb, usb1->fs_cblkno)); 186 pr_debug(" iblkno: %u\n", fs32_to_cpu(sb, usb1->fs_iblkno)); 187 pr_debug(" dblkno: %u\n", fs32_to_cpu(sb, usb1->fs_dblkno)); 188 pr_debug(" cgoffset: %u\n", 189 fs32_to_cpu(sb, usb1->fs_cgoffset)); 190 pr_debug(" ~cgmask: 0x%x\n", 191 ~fs32_to_cpu(sb, usb1->fs_cgmask)); 192 pr_debug(" size: %u\n", fs32_to_cpu(sb, usb1->fs_size)); 193 pr_debug(" dsize: %u\n", fs32_to_cpu(sb, usb1->fs_dsize)); 194 pr_debug(" ncg: %u\n", fs32_to_cpu(sb, usb1->fs_ncg)); 195 pr_debug(" bsize: %u\n", fs32_to_cpu(sb, usb1->fs_bsize)); 196 pr_debug(" fsize: %u\n", fs32_to_cpu(sb, usb1->fs_fsize)); 197 pr_debug(" frag: %u\n", fs32_to_cpu(sb, usb1->fs_frag)); 198 pr_debug(" fragshift: %u\n", 199 fs32_to_cpu(sb, usb1->fs_fragshift)); 200 pr_debug(" ~fmask: %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask)); 201 pr_debug(" fshift: %u\n", fs32_to_cpu(sb, usb1->fs_fshift)); 202 pr_debug(" sbsize: %u\n", fs32_to_cpu(sb, usb1->fs_sbsize)); 203 pr_debug(" spc: %u\n", fs32_to_cpu(sb, usb1->fs_spc)); 204 pr_debug(" cpg: %u\n", fs32_to_cpu(sb, usb1->fs_cpg)); 205 pr_debug(" ipg: %u\n", fs32_to_cpu(sb, usb1->fs_ipg)); 206 pr_debug(" fpg: %u\n", fs32_to_cpu(sb, usb1->fs_fpg)); 207 pr_debug(" csaddr: %u\n", fs32_to_cpu(sb, usb1->fs_csaddr)); 208 pr_debug(" cssize: %u\n", fs32_to_cpu(sb, usb1->fs_cssize)); 209 pr_debug(" cgsize: %u\n", fs32_to_cpu(sb, usb1->fs_cgsize)); 210 pr_debug(" fstodb: %u\n", 211 fs32_to_cpu(sb, usb1->fs_fsbtodb)); 212 pr_debug(" nrpos: %u\n", fs32_to_cpu(sb, usb3->fs_nrpos)); 213 pr_debug(" ndir %u\n", 214 fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir)); 215 pr_debug(" nifree %u\n", 216 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree)); 217 pr_debug(" nbfree %u\n", 218 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree)); 219 pr_debug(" nffree %u\n", 220 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree)); 221 } 222 pr_debug("\n"); 223 } 224 225 /* 226 * Print contents of ufs_cylinder_group, useful for debugging 227 */ 228 static void ufs_print_cylinder_stuff(struct super_block *sb, 229 struct ufs_cylinder_group *cg) 230 { 231 pr_debug("\nufs_print_cylinder_stuff\n"); 232 pr_debug("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group)); 233 pr_debug(" magic: %x\n", fs32_to_cpu(sb, cg->cg_magic)); 234 pr_debug(" time: %u\n", fs32_to_cpu(sb, cg->cg_time)); 235 pr_debug(" cgx: %u\n", fs32_to_cpu(sb, cg->cg_cgx)); 236 pr_debug(" ncyl: %u\n", fs16_to_cpu(sb, cg->cg_ncyl)); 237 pr_debug(" niblk: %u\n", fs16_to_cpu(sb, cg->cg_niblk)); 238 pr_debug(" ndblk: %u\n", fs32_to_cpu(sb, cg->cg_ndblk)); 239 pr_debug(" cs_ndir: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir)); 240 pr_debug(" cs_nbfree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree)); 241 pr_debug(" cs_nifree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree)); 242 pr_debug(" cs_nffree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree)); 243 pr_debug(" rotor: %u\n", fs32_to_cpu(sb, cg->cg_rotor)); 244 pr_debug(" frotor: %u\n", fs32_to_cpu(sb, cg->cg_frotor)); 245 pr_debug(" irotor: %u\n", fs32_to_cpu(sb, cg->cg_irotor)); 246 pr_debug(" frsum: %u, %u, %u, %u, %u, %u, %u, %u\n", 247 fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]), 248 fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]), 249 fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]), 250 fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7])); 251 pr_debug(" btotoff: %u\n", fs32_to_cpu(sb, cg->cg_btotoff)); 252 pr_debug(" boff: %u\n", fs32_to_cpu(sb, cg->cg_boff)); 253 pr_debug(" iuseoff: %u\n", fs32_to_cpu(sb, cg->cg_iusedoff)); 254 pr_debug(" freeoff: %u\n", fs32_to_cpu(sb, cg->cg_freeoff)); 255 pr_debug(" nextfreeoff: %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff)); 256 pr_debug(" clustersumoff %u\n", 257 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff)); 258 pr_debug(" clusteroff %u\n", 259 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff)); 260 pr_debug(" nclusterblks %u\n", 261 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks)); 262 pr_debug("\n"); 263 } 264 #else 265 # define ufs_print_super_stuff(sb, usb1, usb2, usb3) /**/ 266 # define ufs_print_cylinder_stuff(sb, cg) /**/ 267 #endif /* CONFIG_UFS_DEBUG */ 268 269 static const struct super_operations ufs_super_ops; 270 271 void ufs_error (struct super_block * sb, const char * function, 272 const char * fmt, ...) 273 { 274 struct ufs_sb_private_info * uspi; 275 struct ufs_super_block_first * usb1; 276 struct va_format vaf; 277 va_list args; 278 279 uspi = UFS_SB(sb)->s_uspi; 280 usb1 = ubh_get_usb_first(uspi); 281 282 if (!sb_rdonly(sb)) { 283 usb1->fs_clean = UFS_FSBAD; 284 ubh_mark_buffer_dirty(USPI_UBH(uspi)); 285 ufs_mark_sb_dirty(sb); 286 sb->s_flags |= SB_RDONLY; 287 } 288 va_start(args, fmt); 289 vaf.fmt = fmt; 290 vaf.va = &args; 291 switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) { 292 case UFS_MOUNT_ONERROR_PANIC: 293 panic("panic (device %s): %s: %pV\n", 294 sb->s_id, function, &vaf); 295 296 case UFS_MOUNT_ONERROR_LOCK: 297 case UFS_MOUNT_ONERROR_UMOUNT: 298 case UFS_MOUNT_ONERROR_REPAIR: 299 pr_crit("error (device %s): %s: %pV\n", 300 sb->s_id, function, &vaf); 301 } 302 va_end(args); 303 } 304 305 void ufs_panic (struct super_block * sb, const char * function, 306 const char * fmt, ...) 307 { 308 struct ufs_sb_private_info * uspi; 309 struct ufs_super_block_first * usb1; 310 struct va_format vaf; 311 va_list args; 312 313 uspi = UFS_SB(sb)->s_uspi; 314 usb1 = ubh_get_usb_first(uspi); 315 316 if (!sb_rdonly(sb)) { 317 usb1->fs_clean = UFS_FSBAD; 318 ubh_mark_buffer_dirty(USPI_UBH(uspi)); 319 ufs_mark_sb_dirty(sb); 320 } 321 va_start(args, fmt); 322 vaf.fmt = fmt; 323 vaf.va = &args; 324 sb->s_flags |= SB_RDONLY; 325 pr_crit("panic (device %s): %s: %pV\n", 326 sb->s_id, function, &vaf); 327 va_end(args); 328 } 329 330 void ufs_warning (struct super_block * sb, const char * function, 331 const char * fmt, ...) 332 { 333 struct va_format vaf; 334 va_list args; 335 336 va_start(args, fmt); 337 vaf.fmt = fmt; 338 vaf.va = &args; 339 pr_warn("(device %s): %s: %pV\n", 340 sb->s_id, function, &vaf); 341 va_end(args); 342 } 343 344 enum { 345 Opt_type_old = UFS_MOUNT_UFSTYPE_OLD, 346 Opt_type_sunx86 = UFS_MOUNT_UFSTYPE_SUNx86, 347 Opt_type_sun = UFS_MOUNT_UFSTYPE_SUN, 348 Opt_type_sunos = UFS_MOUNT_UFSTYPE_SUNOS, 349 Opt_type_44bsd = UFS_MOUNT_UFSTYPE_44BSD, 350 Opt_type_ufs2 = UFS_MOUNT_UFSTYPE_UFS2, 351 Opt_type_hp = UFS_MOUNT_UFSTYPE_HP, 352 Opt_type_nextstepcd = UFS_MOUNT_UFSTYPE_NEXTSTEP_CD, 353 Opt_type_nextstep = UFS_MOUNT_UFSTYPE_NEXTSTEP, 354 Opt_type_openstep = UFS_MOUNT_UFSTYPE_OPENSTEP, 355 Opt_onerror_panic = UFS_MOUNT_ONERROR_PANIC, 356 Opt_onerror_lock = UFS_MOUNT_ONERROR_LOCK, 357 Opt_onerror_umount = UFS_MOUNT_ONERROR_UMOUNT, 358 Opt_onerror_repair = UFS_MOUNT_ONERROR_REPAIR, 359 Opt_err 360 }; 361 362 static const match_table_t tokens = { 363 {Opt_type_old, "ufstype=old"}, 364 {Opt_type_sunx86, "ufstype=sunx86"}, 365 {Opt_type_sun, "ufstype=sun"}, 366 {Opt_type_sunos, "ufstype=sunos"}, 367 {Opt_type_44bsd, "ufstype=44bsd"}, 368 {Opt_type_ufs2, "ufstype=ufs2"}, 369 {Opt_type_ufs2, "ufstype=5xbsd"}, 370 {Opt_type_hp, "ufstype=hp"}, 371 {Opt_type_nextstepcd, "ufstype=nextstep-cd"}, 372 {Opt_type_nextstep, "ufstype=nextstep"}, 373 {Opt_type_openstep, "ufstype=openstep"}, 374 /*end of possible ufs types */ 375 {Opt_onerror_panic, "onerror=panic"}, 376 {Opt_onerror_lock, "onerror=lock"}, 377 {Opt_onerror_umount, "onerror=umount"}, 378 {Opt_onerror_repair, "onerror=repair"}, 379 {Opt_err, NULL} 380 }; 381 382 static int ufs_parse_options (char * options, unsigned * mount_options) 383 { 384 char * p; 385 386 UFSD("ENTER\n"); 387 388 if (!options) 389 return 1; 390 391 while ((p = strsep(&options, ",")) != NULL) { 392 substring_t args[MAX_OPT_ARGS]; 393 int token; 394 if (!*p) 395 continue; 396 397 token = match_token(p, tokens, args); 398 switch (token) { 399 case Opt_type_old: 400 ufs_clear_opt (*mount_options, UFSTYPE); 401 ufs_set_opt (*mount_options, UFSTYPE_OLD); 402 break; 403 case Opt_type_sunx86: 404 ufs_clear_opt (*mount_options, UFSTYPE); 405 ufs_set_opt (*mount_options, UFSTYPE_SUNx86); 406 break; 407 case Opt_type_sun: 408 ufs_clear_opt (*mount_options, UFSTYPE); 409 ufs_set_opt (*mount_options, UFSTYPE_SUN); 410 break; 411 case Opt_type_sunos: 412 ufs_clear_opt(*mount_options, UFSTYPE); 413 ufs_set_opt(*mount_options, UFSTYPE_SUNOS); 414 break; 415 case Opt_type_44bsd: 416 ufs_clear_opt (*mount_options, UFSTYPE); 417 ufs_set_opt (*mount_options, UFSTYPE_44BSD); 418 break; 419 case Opt_type_ufs2: 420 ufs_clear_opt(*mount_options, UFSTYPE); 421 ufs_set_opt(*mount_options, UFSTYPE_UFS2); 422 break; 423 case Opt_type_hp: 424 ufs_clear_opt (*mount_options, UFSTYPE); 425 ufs_set_opt (*mount_options, UFSTYPE_HP); 426 break; 427 case Opt_type_nextstepcd: 428 ufs_clear_opt (*mount_options, UFSTYPE); 429 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD); 430 break; 431 case Opt_type_nextstep: 432 ufs_clear_opt (*mount_options, UFSTYPE); 433 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP); 434 break; 435 case Opt_type_openstep: 436 ufs_clear_opt (*mount_options, UFSTYPE); 437 ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP); 438 break; 439 case Opt_onerror_panic: 440 ufs_clear_opt (*mount_options, ONERROR); 441 ufs_set_opt (*mount_options, ONERROR_PANIC); 442 break; 443 case Opt_onerror_lock: 444 ufs_clear_opt (*mount_options, ONERROR); 445 ufs_set_opt (*mount_options, ONERROR_LOCK); 446 break; 447 case Opt_onerror_umount: 448 ufs_clear_opt (*mount_options, ONERROR); 449 ufs_set_opt (*mount_options, ONERROR_UMOUNT); 450 break; 451 case Opt_onerror_repair: 452 pr_err("Unable to do repair on error, will lock lock instead\n"); 453 ufs_clear_opt (*mount_options, ONERROR); 454 ufs_set_opt (*mount_options, ONERROR_REPAIR); 455 break; 456 default: 457 pr_err("Invalid option: \"%s\" or missing value\n", p); 458 return 0; 459 } 460 } 461 return 1; 462 } 463 464 /* 465 * Different types of UFS hold fs_cstotal in different 466 * places, and use different data structure for it. 467 * To make things simpler we just copy fs_cstotal to ufs_sb_private_info 468 */ 469 static void ufs_setup_cstotal(struct super_block *sb) 470 { 471 struct ufs_sb_info *sbi = UFS_SB(sb); 472 struct ufs_sb_private_info *uspi = sbi->s_uspi; 473 struct ufs_super_block_first *usb1; 474 struct ufs_super_block_second *usb2; 475 struct ufs_super_block_third *usb3; 476 unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE; 477 478 UFSD("ENTER, mtype=%u\n", mtype); 479 usb1 = ubh_get_usb_first(uspi); 480 usb2 = ubh_get_usb_second(uspi); 481 usb3 = ubh_get_usb_third(uspi); 482 483 if ((mtype == UFS_MOUNT_UFSTYPE_44BSD && 484 (usb2->fs_un.fs_u2.fs_maxbsize == usb1->fs_bsize)) || 485 mtype == UFS_MOUNT_UFSTYPE_UFS2) { 486 /*we have statistic in different place, then usual*/ 487 uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir); 488 uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree); 489 uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree); 490 uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree); 491 } else { 492 uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir); 493 uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree); 494 uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree); 495 uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree); 496 } 497 UFSD("EXIT\n"); 498 } 499 500 /* 501 * Read on-disk structures associated with cylinder groups 502 */ 503 static int ufs_read_cylinder_structures(struct super_block *sb) 504 { 505 struct ufs_sb_info *sbi = UFS_SB(sb); 506 struct ufs_sb_private_info *uspi = sbi->s_uspi; 507 struct ufs_buffer_head * ubh; 508 unsigned char * base, * space; 509 unsigned size, blks, i; 510 511 UFSD("ENTER\n"); 512 513 /* 514 * Read cs structures from (usually) first data block 515 * on the device. 516 */ 517 size = uspi->s_cssize; 518 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift; 519 base = space = kmalloc(size, GFP_NOFS); 520 if (!base) 521 goto failed; 522 sbi->s_csp = (struct ufs_csum *)space; 523 for (i = 0; i < blks; i += uspi->s_fpb) { 524 size = uspi->s_bsize; 525 if (i + uspi->s_fpb > blks) 526 size = (blks - i) * uspi->s_fsize; 527 528 ubh = ubh_bread(sb, uspi->s_csaddr + i, size); 529 530 if (!ubh) 531 goto failed; 532 533 ubh_ubhcpymem (space, ubh, size); 534 535 space += size; 536 ubh_brelse (ubh); 537 ubh = NULL; 538 } 539 540 /* 541 * Read cylinder group (we read only first fragment from block 542 * at this time) and prepare internal data structures for cg caching. 543 */ 544 sbi->s_ucg = kmalloc_array(uspi->s_ncg, sizeof(struct buffer_head *), 545 GFP_NOFS); 546 if (!sbi->s_ucg) 547 goto failed; 548 for (i = 0; i < uspi->s_ncg; i++) 549 sbi->s_ucg[i] = NULL; 550 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) { 551 sbi->s_ucpi[i] = NULL; 552 sbi->s_cgno[i] = UFS_CGNO_EMPTY; 553 } 554 for (i = 0; i < uspi->s_ncg; i++) { 555 UFSD("read cg %u\n", i); 556 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i)))) 557 goto failed; 558 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data)) 559 goto failed; 560 561 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data); 562 } 563 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) { 564 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_NOFS))) 565 goto failed; 566 sbi->s_cgno[i] = UFS_CGNO_EMPTY; 567 } 568 sbi->s_cg_loaded = 0; 569 UFSD("EXIT\n"); 570 return 1; 571 572 failed: 573 kfree (base); 574 if (sbi->s_ucg) { 575 for (i = 0; i < uspi->s_ncg; i++) 576 if (sbi->s_ucg[i]) 577 brelse (sbi->s_ucg[i]); 578 kfree (sbi->s_ucg); 579 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) 580 kfree (sbi->s_ucpi[i]); 581 } 582 UFSD("EXIT (FAILED)\n"); 583 return 0; 584 } 585 586 /* 587 * Sync our internal copy of fs_cstotal with disk 588 */ 589 static void ufs_put_cstotal(struct super_block *sb) 590 { 591 unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE; 592 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 593 struct ufs_super_block_first *usb1; 594 struct ufs_super_block_second *usb2; 595 struct ufs_super_block_third *usb3; 596 597 UFSD("ENTER\n"); 598 usb1 = ubh_get_usb_first(uspi); 599 usb2 = ubh_get_usb_second(uspi); 600 usb3 = ubh_get_usb_third(uspi); 601 602 if (mtype == UFS_MOUNT_UFSTYPE_UFS2) { 603 /*we have statistic in different place, then usual*/ 604 usb2->fs_un.fs_u2.cs_ndir = 605 cpu_to_fs64(sb, uspi->cs_total.cs_ndir); 606 usb2->fs_un.fs_u2.cs_nbfree = 607 cpu_to_fs64(sb, uspi->cs_total.cs_nbfree); 608 usb3->fs_un1.fs_u2.cs_nifree = 609 cpu_to_fs64(sb, uspi->cs_total.cs_nifree); 610 usb3->fs_un1.fs_u2.cs_nffree = 611 cpu_to_fs64(sb, uspi->cs_total.cs_nffree); 612 goto out; 613 } 614 615 if (mtype == UFS_MOUNT_UFSTYPE_44BSD && 616 (usb2->fs_un.fs_u2.fs_maxbsize == usb1->fs_bsize)) { 617 /* store stats in both old and new places */ 618 usb2->fs_un.fs_u2.cs_ndir = 619 cpu_to_fs64(sb, uspi->cs_total.cs_ndir); 620 usb2->fs_un.fs_u2.cs_nbfree = 621 cpu_to_fs64(sb, uspi->cs_total.cs_nbfree); 622 usb3->fs_un1.fs_u2.cs_nifree = 623 cpu_to_fs64(sb, uspi->cs_total.cs_nifree); 624 usb3->fs_un1.fs_u2.cs_nffree = 625 cpu_to_fs64(sb, uspi->cs_total.cs_nffree); 626 } 627 usb1->fs_cstotal.cs_ndir = cpu_to_fs32(sb, uspi->cs_total.cs_ndir); 628 usb1->fs_cstotal.cs_nbfree = cpu_to_fs32(sb, uspi->cs_total.cs_nbfree); 629 usb1->fs_cstotal.cs_nifree = cpu_to_fs32(sb, uspi->cs_total.cs_nifree); 630 usb1->fs_cstotal.cs_nffree = cpu_to_fs32(sb, uspi->cs_total.cs_nffree); 631 out: 632 ubh_mark_buffer_dirty(USPI_UBH(uspi)); 633 ufs_print_super_stuff(sb, usb1, usb2, usb3); 634 UFSD("EXIT\n"); 635 } 636 637 /** 638 * ufs_put_super_internal() - put on-disk intrenal structures 639 * @sb: pointer to super_block structure 640 * Put on-disk structures associated with cylinder groups 641 * and write them back to disk, also update cs_total on disk 642 */ 643 static void ufs_put_super_internal(struct super_block *sb) 644 { 645 struct ufs_sb_info *sbi = UFS_SB(sb); 646 struct ufs_sb_private_info *uspi = sbi->s_uspi; 647 struct ufs_buffer_head * ubh; 648 unsigned char * base, * space; 649 unsigned blks, size, i; 650 651 652 UFSD("ENTER\n"); 653 654 ufs_put_cstotal(sb); 655 size = uspi->s_cssize; 656 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift; 657 base = space = (char*) sbi->s_csp; 658 for (i = 0; i < blks; i += uspi->s_fpb) { 659 size = uspi->s_bsize; 660 if (i + uspi->s_fpb > blks) 661 size = (blks - i) * uspi->s_fsize; 662 663 ubh = ubh_bread(sb, uspi->s_csaddr + i, size); 664 665 ubh_memcpyubh (ubh, space, size); 666 space += size; 667 ubh_mark_buffer_uptodate (ubh, 1); 668 ubh_mark_buffer_dirty (ubh); 669 ubh_brelse (ubh); 670 } 671 for (i = 0; i < sbi->s_cg_loaded; i++) { 672 ufs_put_cylinder (sb, i); 673 kfree (sbi->s_ucpi[i]); 674 } 675 for (; i < UFS_MAX_GROUP_LOADED; i++) 676 kfree (sbi->s_ucpi[i]); 677 for (i = 0; i < uspi->s_ncg; i++) 678 brelse (sbi->s_ucg[i]); 679 kfree (sbi->s_ucg); 680 kfree (base); 681 682 UFSD("EXIT\n"); 683 } 684 685 static int ufs_sync_fs(struct super_block *sb, int wait) 686 { 687 struct ufs_sb_private_info * uspi; 688 struct ufs_super_block_first * usb1; 689 struct ufs_super_block_third * usb3; 690 unsigned flags; 691 692 mutex_lock(&UFS_SB(sb)->s_lock); 693 694 UFSD("ENTER\n"); 695 696 flags = UFS_SB(sb)->s_flags; 697 uspi = UFS_SB(sb)->s_uspi; 698 usb1 = ubh_get_usb_first(uspi); 699 usb3 = ubh_get_usb_third(uspi); 700 701 usb1->fs_time = ufs_get_seconds(sb); 702 if ((flags & UFS_ST_MASK) == UFS_ST_SUN || 703 (flags & UFS_ST_MASK) == UFS_ST_SUNOS || 704 (flags & UFS_ST_MASK) == UFS_ST_SUNx86) 705 ufs_set_fs_state(sb, usb1, usb3, 706 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time)); 707 ufs_put_cstotal(sb); 708 709 UFSD("EXIT\n"); 710 mutex_unlock(&UFS_SB(sb)->s_lock); 711 712 return 0; 713 } 714 715 static void delayed_sync_fs(struct work_struct *work) 716 { 717 struct ufs_sb_info *sbi; 718 719 sbi = container_of(work, struct ufs_sb_info, sync_work.work); 720 721 spin_lock(&sbi->work_lock); 722 sbi->work_queued = 0; 723 spin_unlock(&sbi->work_lock); 724 725 ufs_sync_fs(sbi->sb, 1); 726 } 727 728 void ufs_mark_sb_dirty(struct super_block *sb) 729 { 730 struct ufs_sb_info *sbi = UFS_SB(sb); 731 unsigned long delay; 732 733 spin_lock(&sbi->work_lock); 734 if (!sbi->work_queued) { 735 delay = msecs_to_jiffies(dirty_writeback_interval * 10); 736 queue_delayed_work(system_long_wq, &sbi->sync_work, delay); 737 sbi->work_queued = 1; 738 } 739 spin_unlock(&sbi->work_lock); 740 } 741 742 static void ufs_put_super(struct super_block *sb) 743 { 744 struct ufs_sb_info * sbi = UFS_SB(sb); 745 746 UFSD("ENTER\n"); 747 748 if (!sb_rdonly(sb)) 749 ufs_put_super_internal(sb); 750 cancel_delayed_work_sync(&sbi->sync_work); 751 752 ubh_brelse_uspi (sbi->s_uspi); 753 kfree (sbi->s_uspi); 754 kfree (sbi); 755 sb->s_fs_info = NULL; 756 UFSD("EXIT\n"); 757 return; 758 } 759 760 static u64 ufs_max_bytes(struct super_block *sb) 761 { 762 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 763 int bits = uspi->s_apbshift; 764 u64 res; 765 766 if (bits > 21) 767 res = ~0ULL; 768 else 769 res = UFS_NDADDR + (1LL << bits) + (1LL << (2*bits)) + 770 (1LL << (3*bits)); 771 772 if (res >= (MAX_LFS_FILESIZE >> uspi->s_bshift)) 773 return MAX_LFS_FILESIZE; 774 return res << uspi->s_bshift; 775 } 776 777 static int ufs_fill_super(struct super_block *sb, void *data, int silent) 778 { 779 struct ufs_sb_info * sbi; 780 struct ufs_sb_private_info * uspi; 781 struct ufs_super_block_first * usb1; 782 struct ufs_super_block_second * usb2; 783 struct ufs_super_block_third * usb3; 784 struct ufs_buffer_head * ubh; 785 struct inode *inode; 786 unsigned block_size, super_block_size; 787 unsigned flags; 788 unsigned super_block_offset; 789 unsigned maxsymlen; 790 int ret = -EINVAL; 791 792 uspi = NULL; 793 ubh = NULL; 794 flags = 0; 795 796 UFSD("ENTER\n"); 797 798 #ifndef CONFIG_UFS_FS_WRITE 799 if (!sb_rdonly(sb)) { 800 pr_err("ufs was compiled with read-only support, can't be mounted as read-write\n"); 801 return -EROFS; 802 } 803 #endif 804 805 sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL); 806 if (!sbi) 807 goto failed_nomem; 808 sb->s_fs_info = sbi; 809 sbi->sb = sb; 810 811 UFSD("flag %u\n", (int)(sb_rdonly(sb))); 812 813 mutex_init(&sbi->s_lock); 814 spin_lock_init(&sbi->work_lock); 815 INIT_DELAYED_WORK(&sbi->sync_work, delayed_sync_fs); 816 /* 817 * Set default mount options 818 * Parse mount options 819 */ 820 sbi->s_mount_opt = 0; 821 ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK); 822 if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) { 823 pr_err("wrong mount options\n"); 824 goto failed; 825 } 826 if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) { 827 if (!silent) 828 pr_err("You didn't specify the type of your ufs filesystem\n\n" 829 "mount -t ufs -o ufstype=" 830 "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n" 831 ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, " 832 "default is ufstype=old\n"); 833 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD); 834 } 835 836 uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL); 837 sbi->s_uspi = uspi; 838 if (!uspi) 839 goto failed; 840 uspi->s_dirblksize = UFS_SECTOR_SIZE; 841 super_block_offset=UFS_SBLOCK; 842 843 sb->s_maxbytes = MAX_LFS_FILESIZE; 844 845 sb->s_time_gran = NSEC_PER_SEC; 846 sb->s_time_min = S32_MIN; 847 sb->s_time_max = S32_MAX; 848 849 switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) { 850 case UFS_MOUNT_UFSTYPE_44BSD: 851 UFSD("ufstype=44bsd\n"); 852 uspi->s_fsize = block_size = 512; 853 uspi->s_fmask = ~(512 - 1); 854 uspi->s_fshift = 9; 855 uspi->s_sbsize = super_block_size = 1536; 856 uspi->s_sbbase = 0; 857 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; 858 break; 859 case UFS_MOUNT_UFSTYPE_UFS2: 860 UFSD("ufstype=ufs2\n"); 861 super_block_offset=SBLOCK_UFS2; 862 uspi->s_fsize = block_size = 512; 863 uspi->s_fmask = ~(512 - 1); 864 uspi->s_fshift = 9; 865 uspi->s_sbsize = super_block_size = 1536; 866 uspi->s_sbbase = 0; 867 sb->s_time_gran = 1; 868 sb->s_time_min = S64_MIN; 869 sb->s_time_max = S64_MAX; 870 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; 871 break; 872 873 case UFS_MOUNT_UFSTYPE_SUN: 874 UFSD("ufstype=sun\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 uspi->s_maxsymlinklen = 0; /* Not supported on disk */ 881 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN; 882 break; 883 884 case UFS_MOUNT_UFSTYPE_SUNOS: 885 UFSD("ufstype=sunos\n"); 886 uspi->s_fsize = block_size = 1024; 887 uspi->s_fmask = ~(1024 - 1); 888 uspi->s_fshift = 10; 889 uspi->s_sbsize = 2048; 890 super_block_size = 2048; 891 uspi->s_sbbase = 0; 892 uspi->s_maxsymlinklen = 0; /* Not supported on disk */ 893 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_SUNOS | UFS_CG_SUN; 894 break; 895 896 case UFS_MOUNT_UFSTYPE_SUNx86: 897 UFSD("ufstype=sunx86\n"); 898 uspi->s_fsize = block_size = 1024; 899 uspi->s_fmask = ~(1024 - 1); 900 uspi->s_fshift = 10; 901 uspi->s_sbsize = super_block_size = 2048; 902 uspi->s_sbbase = 0; 903 uspi->s_maxsymlinklen = 0; /* Not supported on disk */ 904 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN; 905 break; 906 907 case UFS_MOUNT_UFSTYPE_OLD: 908 UFSD("ufstype=old\n"); 909 uspi->s_fsize = block_size = 1024; 910 uspi->s_fmask = ~(1024 - 1); 911 uspi->s_fshift = 10; 912 uspi->s_sbsize = super_block_size = 2048; 913 uspi->s_sbbase = 0; 914 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 915 if (!sb_rdonly(sb)) { 916 if (!silent) 917 pr_info("ufstype=old is supported read-only\n"); 918 sb->s_flags |= SB_RDONLY; 919 } 920 break; 921 922 case UFS_MOUNT_UFSTYPE_NEXTSTEP: 923 UFSD("ufstype=nextstep\n"); 924 uspi->s_fsize = block_size = 1024; 925 uspi->s_fmask = ~(1024 - 1); 926 uspi->s_fshift = 10; 927 uspi->s_sbsize = super_block_size = 2048; 928 uspi->s_sbbase = 0; 929 uspi->s_dirblksize = 1024; 930 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 931 if (!sb_rdonly(sb)) { 932 if (!silent) 933 pr_info("ufstype=nextstep is supported read-only\n"); 934 sb->s_flags |= SB_RDONLY; 935 } 936 break; 937 938 case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD: 939 UFSD("ufstype=nextstep-cd\n"); 940 uspi->s_fsize = block_size = 2048; 941 uspi->s_fmask = ~(2048 - 1); 942 uspi->s_fshift = 11; 943 uspi->s_sbsize = super_block_size = 2048; 944 uspi->s_sbbase = 0; 945 uspi->s_dirblksize = 1024; 946 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 947 if (!sb_rdonly(sb)) { 948 if (!silent) 949 pr_info("ufstype=nextstep-cd is supported read-only\n"); 950 sb->s_flags |= SB_RDONLY; 951 } 952 break; 953 954 case UFS_MOUNT_UFSTYPE_OPENSTEP: 955 UFSD("ufstype=openstep\n"); 956 uspi->s_fsize = block_size = 1024; 957 uspi->s_fmask = ~(1024 - 1); 958 uspi->s_fshift = 10; 959 uspi->s_sbsize = super_block_size = 2048; 960 uspi->s_sbbase = 0; 961 uspi->s_dirblksize = 1024; 962 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; 963 if (!sb_rdonly(sb)) { 964 if (!silent) 965 pr_info("ufstype=openstep is supported read-only\n"); 966 sb->s_flags |= SB_RDONLY; 967 } 968 break; 969 970 case UFS_MOUNT_UFSTYPE_HP: 971 UFSD("ufstype=hp\n"); 972 uspi->s_fsize = block_size = 1024; 973 uspi->s_fmask = ~(1024 - 1); 974 uspi->s_fshift = 10; 975 uspi->s_sbsize = super_block_size = 2048; 976 uspi->s_sbbase = 0; 977 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 978 if (!sb_rdonly(sb)) { 979 if (!silent) 980 pr_info("ufstype=hp is supported read-only\n"); 981 sb->s_flags |= SB_RDONLY; 982 } 983 break; 984 default: 985 if (!silent) 986 pr_err("unknown ufstype\n"); 987 goto failed; 988 } 989 990 again: 991 if (!sb_set_blocksize(sb, block_size)) { 992 pr_err("failed to set blocksize\n"); 993 goto failed; 994 } 995 996 /* 997 * read ufs super block from device 998 */ 999 1000 ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size); 1001 1002 if (!ubh) 1003 goto failed; 1004 1005 usb1 = ubh_get_usb_first(uspi); 1006 usb2 = ubh_get_usb_second(uspi); 1007 usb3 = ubh_get_usb_third(uspi); 1008 1009 /* Sort out mod used on SunOS 4.1.3 for fs_state */ 1010 uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat); 1011 if (((flags & UFS_ST_MASK) == UFS_ST_SUNOS) && 1012 (uspi->s_postblformat != UFS_42POSTBLFMT)) { 1013 flags &= ~UFS_ST_MASK; 1014 flags |= UFS_ST_SUN; 1015 } 1016 1017 if ((flags & UFS_ST_MASK) == UFS_ST_44BSD && 1018 uspi->s_postblformat == UFS_42POSTBLFMT) { 1019 if (!silent) 1020 pr_err("this is not a 44bsd filesystem"); 1021 goto failed; 1022 } 1023 1024 /* 1025 * Check ufs magic number 1026 */ 1027 sbi->s_bytesex = BYTESEX_LE; 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 sbi->s_bytesex = BYTESEX_BE; 1038 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) { 1039 case UFS_MAGIC: 1040 case UFS_MAGIC_BW: 1041 case UFS2_MAGIC: 1042 case UFS_MAGIC_LFN: 1043 case UFS_MAGIC_FEA: 1044 case UFS_MAGIC_4GB: 1045 goto magic_found; 1046 } 1047 1048 if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP) 1049 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD) 1050 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP)) 1051 && uspi->s_sbbase < 256) { 1052 ubh_brelse_uspi(uspi); 1053 ubh = NULL; 1054 uspi->s_sbbase += 8; 1055 goto again; 1056 } 1057 if (!silent) 1058 pr_err("%s(): bad magic number\n", __func__); 1059 goto failed; 1060 1061 magic_found: 1062 /* 1063 * Check block and fragment sizes 1064 */ 1065 uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize); 1066 uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize); 1067 uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize); 1068 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask); 1069 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift); 1070 1071 if (!is_power_of_2(uspi->s_fsize)) { 1072 pr_err("%s(): fragment size %u is not a power of 2\n", 1073 __func__, uspi->s_fsize); 1074 goto failed; 1075 } 1076 if (uspi->s_fsize < 512) { 1077 pr_err("%s(): fragment size %u is too small\n", 1078 __func__, uspi->s_fsize); 1079 goto failed; 1080 } 1081 if (uspi->s_fsize > 4096) { 1082 pr_err("%s(): fragment size %u is too large\n", 1083 __func__, uspi->s_fsize); 1084 goto failed; 1085 } 1086 if (!is_power_of_2(uspi->s_bsize)) { 1087 pr_err("%s(): block size %u is not a power of 2\n", 1088 __func__, uspi->s_bsize); 1089 goto failed; 1090 } 1091 if (uspi->s_bsize < 4096) { 1092 pr_err("%s(): block size %u is too small\n", 1093 __func__, uspi->s_bsize); 1094 goto failed; 1095 } 1096 if (uspi->s_bsize / uspi->s_fsize > 8) { 1097 pr_err("%s(): too many fragments per block (%u)\n", 1098 __func__, uspi->s_bsize / uspi->s_fsize); 1099 goto failed; 1100 } 1101 if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) { 1102 ubh_brelse_uspi(uspi); 1103 ubh = NULL; 1104 block_size = uspi->s_fsize; 1105 super_block_size = uspi->s_sbsize; 1106 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size); 1107 goto again; 1108 } 1109 1110 sbi->s_flags = flags;/*after that line some functions use s_flags*/ 1111 ufs_print_super_stuff(sb, usb1, usb2, usb3); 1112 1113 /* 1114 * Check, if file system was correctly unmounted. 1115 * If not, make it read only. 1116 */ 1117 if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) || 1118 ((flags & UFS_ST_MASK) == UFS_ST_OLD) || 1119 (((flags & UFS_ST_MASK) == UFS_ST_SUN || 1120 (flags & UFS_ST_MASK) == UFS_ST_SUNOS || 1121 (flags & UFS_ST_MASK) == UFS_ST_SUNx86) && 1122 (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) { 1123 switch(usb1->fs_clean) { 1124 case UFS_FSCLEAN: 1125 UFSD("fs is clean\n"); 1126 break; 1127 case UFS_FSSTABLE: 1128 UFSD("fs is stable\n"); 1129 break; 1130 case UFS_FSLOG: 1131 UFSD("fs is logging fs\n"); 1132 break; 1133 case UFS_FSOSF1: 1134 UFSD("fs is DEC OSF/1\n"); 1135 break; 1136 case UFS_FSACTIVE: 1137 pr_err("%s(): fs is active\n", __func__); 1138 sb->s_flags |= SB_RDONLY; 1139 break; 1140 case UFS_FSBAD: 1141 pr_err("%s(): fs is bad\n", __func__); 1142 sb->s_flags |= SB_RDONLY; 1143 break; 1144 default: 1145 pr_err("%s(): can't grok fs_clean 0x%x\n", 1146 __func__, usb1->fs_clean); 1147 sb->s_flags |= SB_RDONLY; 1148 break; 1149 } 1150 } else { 1151 pr_err("%s(): fs needs fsck\n", __func__); 1152 sb->s_flags |= SB_RDONLY; 1153 } 1154 1155 /* 1156 * Read ufs_super_block into internal data structures 1157 */ 1158 sb->s_op = &ufs_super_ops; 1159 sb->s_export_op = &ufs_export_ops; 1160 1161 sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic); 1162 1163 uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno); 1164 uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno); 1165 uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno); 1166 uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno); 1167 uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset); 1168 uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask); 1169 1170 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { 1171 uspi->s_size = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size); 1172 uspi->s_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize); 1173 } else { 1174 uspi->s_size = fs32_to_cpu(sb, usb1->fs_size); 1175 uspi->s_dsize = fs32_to_cpu(sb, usb1->fs_dsize); 1176 } 1177 1178 uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg); 1179 /* s_bsize already set */ 1180 /* s_fsize already set */ 1181 uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag); 1182 uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree); 1183 uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask); 1184 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask); 1185 uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift); 1186 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift); 1187 UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift, 1188 uspi->s_fshift); 1189 uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift); 1190 uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb); 1191 /* s_sbsize already set */ 1192 uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask); 1193 uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift); 1194 uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir); 1195 uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb); 1196 uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf); 1197 uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3); 1198 uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave); 1199 uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew); 1200 1201 if (uspi->fs_magic == UFS2_MAGIC) 1202 uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr); 1203 else 1204 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr); 1205 1206 uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize); 1207 uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize); 1208 uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak); 1209 uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect); 1210 uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc); 1211 uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg); 1212 uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg); 1213 uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc); 1214 uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize); 1215 uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3); 1216 uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3); 1217 uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos); 1218 uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff); 1219 uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff); 1220 1221 uspi->s_root_blocks = mul_u64_u32_div(uspi->s_dsize, 1222 uspi->s_minfree, 100); 1223 if (uspi->s_minfree <= 5) { 1224 uspi->s_time_to_space = ~0ULL; 1225 uspi->s_space_to_time = 0; 1226 usb1->fs_optim = cpu_to_fs32(sb, UFS_OPTSPACE); 1227 } else { 1228 uspi->s_time_to_space = (uspi->s_root_blocks / 2) + 1; 1229 uspi->s_space_to_time = mul_u64_u32_div(uspi->s_dsize, 1230 uspi->s_minfree - 2, 100) - 1; 1231 } 1232 1233 /* 1234 * Compute another frequently used values 1235 */ 1236 uspi->s_fpbmask = uspi->s_fpb - 1; 1237 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) 1238 uspi->s_apbshift = uspi->s_bshift - 3; 1239 else 1240 uspi->s_apbshift = uspi->s_bshift - 2; 1241 1242 uspi->s_2apbshift = uspi->s_apbshift * 2; 1243 uspi->s_3apbshift = uspi->s_apbshift * 3; 1244 uspi->s_apb = 1 << uspi->s_apbshift; 1245 uspi->s_2apb = 1 << uspi->s_2apbshift; 1246 uspi->s_3apb = 1 << uspi->s_3apbshift; 1247 uspi->s_apbmask = uspi->s_apb - 1; 1248 uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS; 1249 uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift; 1250 uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift; 1251 uspi->s_bpf = uspi->s_fsize << 3; 1252 uspi->s_bpfshift = uspi->s_fshift + 3; 1253 uspi->s_bpfmask = uspi->s_bpf - 1; 1254 if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_44BSD || 1255 (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_UFS2) 1256 uspi->s_maxsymlinklen = 1257 fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen); 1258 1259 if (uspi->fs_magic == UFS2_MAGIC) 1260 maxsymlen = 2 * 4 * (UFS_NDADDR + UFS_NINDIR); 1261 else 1262 maxsymlen = 4 * (UFS_NDADDR + UFS_NINDIR); 1263 if (uspi->s_maxsymlinklen > maxsymlen) { 1264 ufs_warning(sb, __func__, "ufs_read_super: excessive maximum " 1265 "fast symlink size (%u)\n", uspi->s_maxsymlinklen); 1266 uspi->s_maxsymlinklen = maxsymlen; 1267 } 1268 sb->s_maxbytes = ufs_max_bytes(sb); 1269 sb->s_max_links = UFS_LINK_MAX; 1270 1271 inode = ufs_iget(sb, UFS_ROOTINO); 1272 if (IS_ERR(inode)) { 1273 ret = PTR_ERR(inode); 1274 goto failed; 1275 } 1276 sb->s_root = d_make_root(inode); 1277 if (!sb->s_root) { 1278 ret = -ENOMEM; 1279 goto failed; 1280 } 1281 1282 ufs_setup_cstotal(sb); 1283 /* 1284 * Read cylinder group structures 1285 */ 1286 if (!sb_rdonly(sb)) 1287 if (!ufs_read_cylinder_structures(sb)) 1288 goto failed; 1289 1290 UFSD("EXIT\n"); 1291 return 0; 1292 1293 failed: 1294 if (ubh) 1295 ubh_brelse_uspi (uspi); 1296 kfree (uspi); 1297 kfree(sbi); 1298 sb->s_fs_info = NULL; 1299 UFSD("EXIT (FAILED)\n"); 1300 return ret; 1301 1302 failed_nomem: 1303 UFSD("EXIT (NOMEM)\n"); 1304 return -ENOMEM; 1305 } 1306 1307 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data) 1308 { 1309 struct ufs_sb_private_info * uspi; 1310 struct ufs_super_block_first * usb1; 1311 struct ufs_super_block_third * usb3; 1312 unsigned new_mount_opt, ufstype; 1313 unsigned flags; 1314 1315 sync_filesystem(sb); 1316 mutex_lock(&UFS_SB(sb)->s_lock); 1317 uspi = UFS_SB(sb)->s_uspi; 1318 flags = UFS_SB(sb)->s_flags; 1319 usb1 = ubh_get_usb_first(uspi); 1320 usb3 = ubh_get_usb_third(uspi); 1321 1322 /* 1323 * Allow the "check" option to be passed as a remount option. 1324 * It is not possible to change ufstype option during remount 1325 */ 1326 ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE; 1327 new_mount_opt = 0; 1328 ufs_set_opt (new_mount_opt, ONERROR_LOCK); 1329 if (!ufs_parse_options (data, &new_mount_opt)) { 1330 mutex_unlock(&UFS_SB(sb)->s_lock); 1331 return -EINVAL; 1332 } 1333 if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) { 1334 new_mount_opt |= ufstype; 1335 } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) { 1336 pr_err("ufstype can't be changed during remount\n"); 1337 mutex_unlock(&UFS_SB(sb)->s_lock); 1338 return -EINVAL; 1339 } 1340 1341 if ((bool)(*mount_flags & SB_RDONLY) == sb_rdonly(sb)) { 1342 UFS_SB(sb)->s_mount_opt = new_mount_opt; 1343 mutex_unlock(&UFS_SB(sb)->s_lock); 1344 return 0; 1345 } 1346 1347 /* 1348 * fs was mouted as rw, remounting ro 1349 */ 1350 if (*mount_flags & SB_RDONLY) { 1351 ufs_put_super_internal(sb); 1352 usb1->fs_time = ufs_get_seconds(sb); 1353 if ((flags & UFS_ST_MASK) == UFS_ST_SUN 1354 || (flags & UFS_ST_MASK) == UFS_ST_SUNOS 1355 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86) 1356 ufs_set_fs_state(sb, usb1, usb3, 1357 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time)); 1358 ubh_mark_buffer_dirty (USPI_UBH(uspi)); 1359 sb->s_flags |= SB_RDONLY; 1360 } else { 1361 /* 1362 * fs was mounted as ro, remounting rw 1363 */ 1364 #ifndef CONFIG_UFS_FS_WRITE 1365 pr_err("ufs was compiled with read-only support, can't be mounted as read-write\n"); 1366 mutex_unlock(&UFS_SB(sb)->s_lock); 1367 return -EINVAL; 1368 #else 1369 if (ufstype != UFS_MOUNT_UFSTYPE_SUN && 1370 ufstype != UFS_MOUNT_UFSTYPE_SUNOS && 1371 ufstype != UFS_MOUNT_UFSTYPE_44BSD && 1372 ufstype != UFS_MOUNT_UFSTYPE_SUNx86 && 1373 ufstype != UFS_MOUNT_UFSTYPE_UFS2) { 1374 pr_err("this ufstype is read-only supported\n"); 1375 mutex_unlock(&UFS_SB(sb)->s_lock); 1376 return -EINVAL; 1377 } 1378 if (!ufs_read_cylinder_structures(sb)) { 1379 pr_err("failed during remounting\n"); 1380 mutex_unlock(&UFS_SB(sb)->s_lock); 1381 return -EPERM; 1382 } 1383 sb->s_flags &= ~SB_RDONLY; 1384 #endif 1385 } 1386 UFS_SB(sb)->s_mount_opt = new_mount_opt; 1387 mutex_unlock(&UFS_SB(sb)->s_lock); 1388 return 0; 1389 } 1390 1391 static int ufs_show_options(struct seq_file *seq, struct dentry *root) 1392 { 1393 struct ufs_sb_info *sbi = UFS_SB(root->d_sb); 1394 unsigned mval = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE; 1395 const struct match_token *tp = tokens; 1396 1397 while (tp->token != Opt_onerror_panic && tp->token != mval) 1398 ++tp; 1399 BUG_ON(tp->token == Opt_onerror_panic); 1400 seq_printf(seq, ",%s", tp->pattern); 1401 1402 mval = sbi->s_mount_opt & UFS_MOUNT_ONERROR; 1403 while (tp->token != Opt_err && tp->token != mval) 1404 ++tp; 1405 BUG_ON(tp->token == Opt_err); 1406 seq_printf(seq, ",%s", tp->pattern); 1407 1408 return 0; 1409 } 1410 1411 static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf) 1412 { 1413 struct super_block *sb = dentry->d_sb; 1414 struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi; 1415 unsigned flags = UFS_SB(sb)->s_flags; 1416 u64 id = huge_encode_dev(sb->s_bdev->bd_dev); 1417 1418 mutex_lock(&UFS_SB(sb)->s_lock); 1419 1420 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) 1421 buf->f_type = UFS2_MAGIC; 1422 else 1423 buf->f_type = UFS_MAGIC; 1424 1425 buf->f_blocks = uspi->s_dsize; 1426 buf->f_bfree = ufs_freefrags(uspi); 1427 buf->f_ffree = uspi->cs_total.cs_nifree; 1428 buf->f_bsize = sb->s_blocksize; 1429 buf->f_bavail = (buf->f_bfree > uspi->s_root_blocks) 1430 ? (buf->f_bfree - uspi->s_root_blocks) : 0; 1431 buf->f_files = uspi->s_ncg * uspi->s_ipg; 1432 buf->f_namelen = UFS_MAXNAMLEN; 1433 buf->f_fsid = u64_to_fsid(id); 1434 1435 mutex_unlock(&UFS_SB(sb)->s_lock); 1436 1437 return 0; 1438 } 1439 1440 static struct kmem_cache * ufs_inode_cachep; 1441 1442 static struct inode *ufs_alloc_inode(struct super_block *sb) 1443 { 1444 struct ufs_inode_info *ei; 1445 1446 ei = kmem_cache_alloc(ufs_inode_cachep, GFP_NOFS); 1447 if (!ei) 1448 return NULL; 1449 1450 inode_set_iversion(&ei->vfs_inode, 1); 1451 seqlock_init(&ei->meta_lock); 1452 mutex_init(&ei->truncate_mutex); 1453 return &ei->vfs_inode; 1454 } 1455 1456 static void ufs_free_in_core_inode(struct inode *inode) 1457 { 1458 kmem_cache_free(ufs_inode_cachep, UFS_I(inode)); 1459 } 1460 1461 static void init_once(void *foo) 1462 { 1463 struct ufs_inode_info *ei = (struct ufs_inode_info *) foo; 1464 1465 inode_init_once(&ei->vfs_inode); 1466 } 1467 1468 static int __init init_inodecache(void) 1469 { 1470 ufs_inode_cachep = kmem_cache_create_usercopy("ufs_inode_cache", 1471 sizeof(struct ufs_inode_info), 0, 1472 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD| 1473 SLAB_ACCOUNT), 1474 offsetof(struct ufs_inode_info, i_u1.i_symlink), 1475 sizeof_field(struct ufs_inode_info, 1476 i_u1.i_symlink), 1477 init_once); 1478 if (ufs_inode_cachep == NULL) 1479 return -ENOMEM; 1480 return 0; 1481 } 1482 1483 static void destroy_inodecache(void) 1484 { 1485 /* 1486 * Make sure all delayed rcu free inodes are flushed before we 1487 * destroy cache. 1488 */ 1489 rcu_barrier(); 1490 kmem_cache_destroy(ufs_inode_cachep); 1491 } 1492 1493 static const struct super_operations ufs_super_ops = { 1494 .alloc_inode = ufs_alloc_inode, 1495 .free_inode = ufs_free_in_core_inode, 1496 .write_inode = ufs_write_inode, 1497 .evict_inode = ufs_evict_inode, 1498 .put_super = ufs_put_super, 1499 .sync_fs = ufs_sync_fs, 1500 .statfs = ufs_statfs, 1501 .remount_fs = ufs_remount, 1502 .show_options = ufs_show_options, 1503 }; 1504 1505 static struct dentry *ufs_mount(struct file_system_type *fs_type, 1506 int flags, const char *dev_name, void *data) 1507 { 1508 return mount_bdev(fs_type, flags, dev_name, data, ufs_fill_super); 1509 } 1510 1511 static struct file_system_type ufs_fs_type = { 1512 .owner = THIS_MODULE, 1513 .name = "ufs", 1514 .mount = ufs_mount, 1515 .kill_sb = kill_block_super, 1516 .fs_flags = FS_REQUIRES_DEV, 1517 }; 1518 MODULE_ALIAS_FS("ufs"); 1519 1520 static int __init init_ufs_fs(void) 1521 { 1522 int err = init_inodecache(); 1523 if (err) 1524 goto out1; 1525 err = register_filesystem(&ufs_fs_type); 1526 if (err) 1527 goto out; 1528 return 0; 1529 out: 1530 destroy_inodecache(); 1531 out1: 1532 return err; 1533 } 1534 1535 static void __exit exit_ufs_fs(void) 1536 { 1537 unregister_filesystem(&ufs_fs_type); 1538 destroy_inodecache(); 1539 } 1540 1541 module_init(init_ufs_fs) 1542 module_exit(exit_ufs_fs) 1543 MODULE_LICENSE("GPL"); 1544