1 /* 2 * linux/fs/ufs/super.c 3 * 4 * Copyright (C) 1998 5 * Daniel Pirkl <daniel.pirkl@email.cz> 6 * Charles University, Faculty of Mathematics and Physics 7 */ 8 9 /* Derived from 10 * 11 * linux/fs/ext2/super.c 12 * 13 * Copyright (C) 1992, 1993, 1994, 1995 14 * Remy Card (card@masi.ibp.fr) 15 * Laboratoire MASI - Institut Blaise Pascal 16 * Universite Pierre et Marie Curie (Paris VI) 17 * 18 * from 19 * 20 * linux/fs/minix/inode.c 21 * 22 * Copyright (C) 1991, 1992 Linus Torvalds 23 * 24 * Big-endian to little-endian byte-swapping/bitmaps by 25 * David S. Miller (davem@caip.rutgers.edu), 1995 26 */ 27 28 /* 29 * Inspired by 30 * 31 * linux/fs/ufs/super.c 32 * 33 * Copyright (C) 1996 34 * Adrian Rodriguez (adrian@franklins-tower.rutgers.edu) 35 * Laboratory for Computer Science Research Computing Facility 36 * Rutgers, The State University of New Jersey 37 * 38 * Copyright (C) 1996 Eddie C. Dost (ecd@skynet.be) 39 * 40 * Kernel module support added on 96/04/26 by 41 * Stefan Reinauer <stepan@home.culture.mipt.ru> 42 * 43 * Module usage counts added on 96/04/29 by 44 * Gertjan van Wingerde <gwingerde@gmail.com> 45 * 46 * Clean swab support on 19970406 by 47 * Francois-Rene Rideau <fare@tunes.org> 48 * 49 * 4.4BSD (FreeBSD) support added on February 1st 1998 by 50 * Niels Kristian Bech Jensen <nkbj@image.dk> partially based 51 * on code by Martin von Loewis <martin@mira.isdn.cs.tu-berlin.de>. 52 * 53 * NeXTstep support added on February 5th 1998 by 54 * Niels Kristian Bech Jensen <nkbj@image.dk>. 55 * 56 * write support Daniel Pirkl <daniel.pirkl@email.cz> 1998 57 * 58 * HP/UX hfs filesystem support added by 59 * Martin K. Petersen <mkp@mkp.net>, August 1999 60 * 61 * UFS2 (of FreeBSD 5.x) support added by 62 * Niraj Kumar <niraj17@iitbombay.org>, Jan 2004 63 * 64 * UFS2 write support added by 65 * Evgeniy Dushistov <dushistov@mail.ru>, 2007 66 */ 67 68 #include <linux/exportfs.h> 69 #include <linux/module.h> 70 #include <linux/bitops.h> 71 72 #include <stdarg.h> 73 74 #include <linux/uaccess.h> 75 76 #include <linux/errno.h> 77 #include <linux/fs.h> 78 #include <linux/slab.h> 79 #include <linux/time.h> 80 #include <linux/stat.h> 81 #include <linux/string.h> 82 #include <linux/blkdev.h> 83 #include <linux/backing-dev.h> 84 #include <linux/init.h> 85 #include <linux/parser.h> 86 #include <linux/buffer_head.h> 87 #include <linux/vfs.h> 88 #include <linux/log2.h> 89 #include <linux/mount.h> 90 #include <linux/seq_file.h> 91 #include <linux/iversion.h> 92 93 #include "ufs_fs.h" 94 #include "ufs.h" 95 #include "swab.h" 96 #include "util.h" 97 98 static struct inode *ufs_nfs_get_inode(struct super_block *sb, u64 ino, u32 generation) 99 { 100 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 101 struct inode *inode; 102 103 if (ino < UFS_ROOTINO || ino > uspi->s_ncg * uspi->s_ipg) 104 return ERR_PTR(-ESTALE); 105 106 inode = ufs_iget(sb, ino); 107 if (IS_ERR(inode)) 108 return ERR_CAST(inode); 109 if (generation && inode->i_generation != generation) { 110 iput(inode); 111 return ERR_PTR(-ESTALE); 112 } 113 return inode; 114 } 115 116 static struct dentry *ufs_fh_to_dentry(struct super_block *sb, struct fid *fid, 117 int fh_len, int fh_type) 118 { 119 return generic_fh_to_dentry(sb, fid, fh_len, fh_type, ufs_nfs_get_inode); 120 } 121 122 static struct dentry *ufs_fh_to_parent(struct super_block *sb, struct fid *fid, 123 int fh_len, int fh_type) 124 { 125 return generic_fh_to_parent(sb, fid, fh_len, fh_type, ufs_nfs_get_inode); 126 } 127 128 static struct dentry *ufs_get_parent(struct dentry *child) 129 { 130 struct qstr dot_dot = QSTR_INIT("..", 2); 131 ino_t ino; 132 133 ino = ufs_inode_by_name(d_inode(child), &dot_dot); 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 if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_NOFS))) 545 goto failed; 546 for (i = 0; i < uspi->s_ncg; i++) 547 sbi->s_ucg[i] = NULL; 548 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) { 549 sbi->s_ucpi[i] = NULL; 550 sbi->s_cgno[i] = UFS_CGNO_EMPTY; 551 } 552 for (i = 0; i < uspi->s_ncg; i++) { 553 UFSD("read cg %u\n", i); 554 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i)))) 555 goto failed; 556 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data)) 557 goto failed; 558 559 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data); 560 } 561 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) { 562 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_NOFS))) 563 goto failed; 564 sbi->s_cgno[i] = UFS_CGNO_EMPTY; 565 } 566 sbi->s_cg_loaded = 0; 567 UFSD("EXIT\n"); 568 return 1; 569 570 failed: 571 kfree (base); 572 if (sbi->s_ucg) { 573 for (i = 0; i < uspi->s_ncg; i++) 574 if (sbi->s_ucg[i]) 575 brelse (sbi->s_ucg[i]); 576 kfree (sbi->s_ucg); 577 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) 578 kfree (sbi->s_ucpi[i]); 579 } 580 UFSD("EXIT (FAILED)\n"); 581 return 0; 582 } 583 584 /* 585 * Sync our internal copy of fs_cstotal with disk 586 */ 587 static void ufs_put_cstotal(struct super_block *sb) 588 { 589 unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE; 590 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 591 struct ufs_super_block_first *usb1; 592 struct ufs_super_block_second *usb2; 593 struct ufs_super_block_third *usb3; 594 595 UFSD("ENTER\n"); 596 usb1 = ubh_get_usb_first(uspi); 597 usb2 = ubh_get_usb_second(uspi); 598 usb3 = ubh_get_usb_third(uspi); 599 600 if (mtype == UFS_MOUNT_UFSTYPE_UFS2) { 601 /*we have statistic in different place, then usual*/ 602 usb2->fs_un.fs_u2.cs_ndir = 603 cpu_to_fs64(sb, uspi->cs_total.cs_ndir); 604 usb2->fs_un.fs_u2.cs_nbfree = 605 cpu_to_fs64(sb, uspi->cs_total.cs_nbfree); 606 usb3->fs_un1.fs_u2.cs_nifree = 607 cpu_to_fs64(sb, uspi->cs_total.cs_nifree); 608 usb3->fs_un1.fs_u2.cs_nffree = 609 cpu_to_fs64(sb, uspi->cs_total.cs_nffree); 610 goto out; 611 } 612 613 if (mtype == UFS_MOUNT_UFSTYPE_44BSD && 614 (usb2->fs_un.fs_u2.fs_maxbsize == usb1->fs_bsize)) { 615 /* store stats in both old and new places */ 616 usb2->fs_un.fs_u2.cs_ndir = 617 cpu_to_fs64(sb, uspi->cs_total.cs_ndir); 618 usb2->fs_un.fs_u2.cs_nbfree = 619 cpu_to_fs64(sb, uspi->cs_total.cs_nbfree); 620 usb3->fs_un1.fs_u2.cs_nifree = 621 cpu_to_fs64(sb, uspi->cs_total.cs_nifree); 622 usb3->fs_un1.fs_u2.cs_nffree = 623 cpu_to_fs64(sb, uspi->cs_total.cs_nffree); 624 } 625 usb1->fs_cstotal.cs_ndir = cpu_to_fs32(sb, uspi->cs_total.cs_ndir); 626 usb1->fs_cstotal.cs_nbfree = cpu_to_fs32(sb, uspi->cs_total.cs_nbfree); 627 usb1->fs_cstotal.cs_nifree = cpu_to_fs32(sb, uspi->cs_total.cs_nifree); 628 usb1->fs_cstotal.cs_nffree = cpu_to_fs32(sb, uspi->cs_total.cs_nffree); 629 out: 630 ubh_mark_buffer_dirty(USPI_UBH(uspi)); 631 ufs_print_super_stuff(sb, usb1, usb2, usb3); 632 UFSD("EXIT\n"); 633 } 634 635 /** 636 * ufs_put_super_internal() - put on-disk intrenal structures 637 * @sb: pointer to super_block structure 638 * Put on-disk structures associated with cylinder groups 639 * and write them back to disk, also update cs_total on disk 640 */ 641 static void ufs_put_super_internal(struct super_block *sb) 642 { 643 struct ufs_sb_info *sbi = UFS_SB(sb); 644 struct ufs_sb_private_info *uspi = sbi->s_uspi; 645 struct ufs_buffer_head * ubh; 646 unsigned char * base, * space; 647 unsigned blks, size, i; 648 649 650 UFSD("ENTER\n"); 651 652 ufs_put_cstotal(sb); 653 size = uspi->s_cssize; 654 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift; 655 base = space = (char*) sbi->s_csp; 656 for (i = 0; i < blks; i += uspi->s_fpb) { 657 size = uspi->s_bsize; 658 if (i + uspi->s_fpb > blks) 659 size = (blks - i) * uspi->s_fsize; 660 661 ubh = ubh_bread(sb, uspi->s_csaddr + i, size); 662 663 ubh_memcpyubh (ubh, space, size); 664 space += size; 665 ubh_mark_buffer_uptodate (ubh, 1); 666 ubh_mark_buffer_dirty (ubh); 667 ubh_brelse (ubh); 668 } 669 for (i = 0; i < sbi->s_cg_loaded; i++) { 670 ufs_put_cylinder (sb, i); 671 kfree (sbi->s_ucpi[i]); 672 } 673 for (; i < UFS_MAX_GROUP_LOADED; i++) 674 kfree (sbi->s_ucpi[i]); 675 for (i = 0; i < uspi->s_ncg; i++) 676 brelse (sbi->s_ucg[i]); 677 kfree (sbi->s_ucg); 678 kfree (base); 679 680 UFSD("EXIT\n"); 681 } 682 683 static int ufs_sync_fs(struct super_block *sb, int wait) 684 { 685 struct ufs_sb_private_info * uspi; 686 struct ufs_super_block_first * usb1; 687 struct ufs_super_block_third * usb3; 688 unsigned flags; 689 690 mutex_lock(&UFS_SB(sb)->s_lock); 691 692 UFSD("ENTER\n"); 693 694 flags = UFS_SB(sb)->s_flags; 695 uspi = UFS_SB(sb)->s_uspi; 696 usb1 = ubh_get_usb_first(uspi); 697 usb3 = ubh_get_usb_third(uspi); 698 699 usb1->fs_time = cpu_to_fs32(sb, get_seconds()); 700 if ((flags & UFS_ST_MASK) == UFS_ST_SUN || 701 (flags & UFS_ST_MASK) == UFS_ST_SUNOS || 702 (flags & UFS_ST_MASK) == UFS_ST_SUNx86) 703 ufs_set_fs_state(sb, usb1, usb3, 704 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time)); 705 ufs_put_cstotal(sb); 706 707 UFSD("EXIT\n"); 708 mutex_unlock(&UFS_SB(sb)->s_lock); 709 710 return 0; 711 } 712 713 static void delayed_sync_fs(struct work_struct *work) 714 { 715 struct ufs_sb_info *sbi; 716 717 sbi = container_of(work, struct ufs_sb_info, sync_work.work); 718 719 spin_lock(&sbi->work_lock); 720 sbi->work_queued = 0; 721 spin_unlock(&sbi->work_lock); 722 723 ufs_sync_fs(sbi->sb, 1); 724 } 725 726 void ufs_mark_sb_dirty(struct super_block *sb) 727 { 728 struct ufs_sb_info *sbi = UFS_SB(sb); 729 unsigned long delay; 730 731 spin_lock(&sbi->work_lock); 732 if (!sbi->work_queued) { 733 delay = msecs_to_jiffies(dirty_writeback_interval * 10); 734 queue_delayed_work(system_long_wq, &sbi->sync_work, delay); 735 sbi->work_queued = 1; 736 } 737 spin_unlock(&sbi->work_lock); 738 } 739 740 static void ufs_put_super(struct super_block *sb) 741 { 742 struct ufs_sb_info * sbi = UFS_SB(sb); 743 744 UFSD("ENTER\n"); 745 746 if (!sb_rdonly(sb)) 747 ufs_put_super_internal(sb); 748 cancel_delayed_work_sync(&sbi->sync_work); 749 750 ubh_brelse_uspi (sbi->s_uspi); 751 kfree (sbi->s_uspi); 752 kfree (sbi); 753 sb->s_fs_info = NULL; 754 UFSD("EXIT\n"); 755 return; 756 } 757 758 static u64 ufs_max_bytes(struct super_block *sb) 759 { 760 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 761 int bits = uspi->s_apbshift; 762 u64 res; 763 764 if (bits > 21) 765 res = ~0ULL; 766 else 767 res = UFS_NDADDR + (1LL << bits) + (1LL << (2*bits)) + 768 (1LL << (3*bits)); 769 770 if (res >= (MAX_LFS_FILESIZE >> uspi->s_bshift)) 771 return MAX_LFS_FILESIZE; 772 return res << uspi->s_bshift; 773 } 774 775 static int ufs_fill_super(struct super_block *sb, void *data, int silent) 776 { 777 struct ufs_sb_info * sbi; 778 struct ufs_sb_private_info * uspi; 779 struct ufs_super_block_first * usb1; 780 struct ufs_super_block_second * usb2; 781 struct ufs_super_block_third * usb3; 782 struct ufs_buffer_head * ubh; 783 struct inode *inode; 784 unsigned block_size, super_block_size; 785 unsigned flags; 786 unsigned super_block_offset; 787 unsigned maxsymlen; 788 int ret = -EINVAL; 789 790 uspi = NULL; 791 ubh = NULL; 792 flags = 0; 793 794 UFSD("ENTER\n"); 795 796 #ifndef CONFIG_UFS_FS_WRITE 797 if (!sb_rdonly(sb)) { 798 pr_err("ufs was compiled with read-only support, can't be mounted as read-write\n"); 799 return -EROFS; 800 } 801 #endif 802 803 sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL); 804 if (!sbi) 805 goto failed_nomem; 806 sb->s_fs_info = sbi; 807 sbi->sb = sb; 808 809 UFSD("flag %u\n", (int)(sb_rdonly(sb))); 810 811 mutex_init(&sbi->s_lock); 812 spin_lock_init(&sbi->work_lock); 813 INIT_DELAYED_WORK(&sbi->sync_work, delayed_sync_fs); 814 /* 815 * Set default mount options 816 * Parse mount options 817 */ 818 sbi->s_mount_opt = 0; 819 ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK); 820 if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) { 821 pr_err("wrong mount options\n"); 822 goto failed; 823 } 824 if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) { 825 if (!silent) 826 pr_err("You didn't specify the type of your ufs filesystem\n\n" 827 "mount -t ufs -o ufstype=" 828 "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n" 829 ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, " 830 "default is ufstype=old\n"); 831 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD); 832 } 833 834 uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL); 835 sbi->s_uspi = uspi; 836 if (!uspi) 837 goto failed; 838 uspi->s_dirblksize = UFS_SECTOR_SIZE; 839 super_block_offset=UFS_SBLOCK; 840 841 sb->s_maxbytes = MAX_LFS_FILESIZE; 842 843 switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) { 844 case UFS_MOUNT_UFSTYPE_44BSD: 845 UFSD("ufstype=44bsd\n"); 846 uspi->s_fsize = block_size = 512; 847 uspi->s_fmask = ~(512 - 1); 848 uspi->s_fshift = 9; 849 uspi->s_sbsize = super_block_size = 1536; 850 uspi->s_sbbase = 0; 851 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; 852 break; 853 case UFS_MOUNT_UFSTYPE_UFS2: 854 UFSD("ufstype=ufs2\n"); 855 super_block_offset=SBLOCK_UFS2; 856 uspi->s_fsize = block_size = 512; 857 uspi->s_fmask = ~(512 - 1); 858 uspi->s_fshift = 9; 859 uspi->s_sbsize = super_block_size = 1536; 860 uspi->s_sbbase = 0; 861 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; 862 break; 863 864 case UFS_MOUNT_UFSTYPE_SUN: 865 UFSD("ufstype=sun\n"); 866 uspi->s_fsize = block_size = 1024; 867 uspi->s_fmask = ~(1024 - 1); 868 uspi->s_fshift = 10; 869 uspi->s_sbsize = super_block_size = 2048; 870 uspi->s_sbbase = 0; 871 uspi->s_maxsymlinklen = 0; /* Not supported on disk */ 872 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN; 873 break; 874 875 case UFS_MOUNT_UFSTYPE_SUNOS: 876 UFSD("ufstype=sunos\n"); 877 uspi->s_fsize = block_size = 1024; 878 uspi->s_fmask = ~(1024 - 1); 879 uspi->s_fshift = 10; 880 uspi->s_sbsize = 2048; 881 super_block_size = 2048; 882 uspi->s_sbbase = 0; 883 uspi->s_maxsymlinklen = 0; /* Not supported on disk */ 884 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_SUNOS | UFS_CG_SUN; 885 break; 886 887 case UFS_MOUNT_UFSTYPE_SUNx86: 888 UFSD("ufstype=sunx86\n"); 889 uspi->s_fsize = block_size = 1024; 890 uspi->s_fmask = ~(1024 - 1); 891 uspi->s_fshift = 10; 892 uspi->s_sbsize = super_block_size = 2048; 893 uspi->s_sbbase = 0; 894 uspi->s_maxsymlinklen = 0; /* Not supported on disk */ 895 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN; 896 break; 897 898 case UFS_MOUNT_UFSTYPE_OLD: 899 UFSD("ufstype=old\n"); 900 uspi->s_fsize = block_size = 1024; 901 uspi->s_fmask = ~(1024 - 1); 902 uspi->s_fshift = 10; 903 uspi->s_sbsize = super_block_size = 2048; 904 uspi->s_sbbase = 0; 905 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 906 if (!sb_rdonly(sb)) { 907 if (!silent) 908 pr_info("ufstype=old is supported read-only\n"); 909 sb->s_flags |= SB_RDONLY; 910 } 911 break; 912 913 case UFS_MOUNT_UFSTYPE_NEXTSTEP: 914 UFSD("ufstype=nextstep\n"); 915 uspi->s_fsize = block_size = 1024; 916 uspi->s_fmask = ~(1024 - 1); 917 uspi->s_fshift = 10; 918 uspi->s_sbsize = super_block_size = 2048; 919 uspi->s_sbbase = 0; 920 uspi->s_dirblksize = 1024; 921 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 922 if (!sb_rdonly(sb)) { 923 if (!silent) 924 pr_info("ufstype=nextstep is supported read-only\n"); 925 sb->s_flags |= SB_RDONLY; 926 } 927 break; 928 929 case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD: 930 UFSD("ufstype=nextstep-cd\n"); 931 uspi->s_fsize = block_size = 2048; 932 uspi->s_fmask = ~(2048 - 1); 933 uspi->s_fshift = 11; 934 uspi->s_sbsize = super_block_size = 2048; 935 uspi->s_sbbase = 0; 936 uspi->s_dirblksize = 1024; 937 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 938 if (!sb_rdonly(sb)) { 939 if (!silent) 940 pr_info("ufstype=nextstep-cd is supported read-only\n"); 941 sb->s_flags |= SB_RDONLY; 942 } 943 break; 944 945 case UFS_MOUNT_UFSTYPE_OPENSTEP: 946 UFSD("ufstype=openstep\n"); 947 uspi->s_fsize = block_size = 1024; 948 uspi->s_fmask = ~(1024 - 1); 949 uspi->s_fshift = 10; 950 uspi->s_sbsize = super_block_size = 2048; 951 uspi->s_sbbase = 0; 952 uspi->s_dirblksize = 1024; 953 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; 954 if (!sb_rdonly(sb)) { 955 if (!silent) 956 pr_info("ufstype=openstep is supported read-only\n"); 957 sb->s_flags |= SB_RDONLY; 958 } 959 break; 960 961 case UFS_MOUNT_UFSTYPE_HP: 962 UFSD("ufstype=hp\n"); 963 uspi->s_fsize = block_size = 1024; 964 uspi->s_fmask = ~(1024 - 1); 965 uspi->s_fshift = 10; 966 uspi->s_sbsize = super_block_size = 2048; 967 uspi->s_sbbase = 0; 968 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 969 if (!sb_rdonly(sb)) { 970 if (!silent) 971 pr_info("ufstype=hp is supported read-only\n"); 972 sb->s_flags |= SB_RDONLY; 973 } 974 break; 975 default: 976 if (!silent) 977 pr_err("unknown ufstype\n"); 978 goto failed; 979 } 980 981 again: 982 if (!sb_set_blocksize(sb, block_size)) { 983 pr_err("failed to set blocksize\n"); 984 goto failed; 985 } 986 987 /* 988 * read ufs super block from device 989 */ 990 991 ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size); 992 993 if (!ubh) 994 goto failed; 995 996 usb1 = ubh_get_usb_first(uspi); 997 usb2 = ubh_get_usb_second(uspi); 998 usb3 = ubh_get_usb_third(uspi); 999 1000 /* Sort out mod used on SunOS 4.1.3 for fs_state */ 1001 uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat); 1002 if (((flags & UFS_ST_MASK) == UFS_ST_SUNOS) && 1003 (uspi->s_postblformat != UFS_42POSTBLFMT)) { 1004 flags &= ~UFS_ST_MASK; 1005 flags |= UFS_ST_SUN; 1006 } 1007 1008 if ((flags & UFS_ST_MASK) == UFS_ST_44BSD && 1009 uspi->s_postblformat == UFS_42POSTBLFMT) { 1010 if (!silent) 1011 pr_err("this is not a 44bsd filesystem"); 1012 goto failed; 1013 } 1014 1015 /* 1016 * Check ufs magic number 1017 */ 1018 sbi->s_bytesex = BYTESEX_LE; 1019 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) { 1020 case UFS_MAGIC: 1021 case UFS_MAGIC_BW: 1022 case UFS2_MAGIC: 1023 case UFS_MAGIC_LFN: 1024 case UFS_MAGIC_FEA: 1025 case UFS_MAGIC_4GB: 1026 goto magic_found; 1027 } 1028 sbi->s_bytesex = BYTESEX_BE; 1029 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) { 1030 case UFS_MAGIC: 1031 case UFS_MAGIC_BW: 1032 case UFS2_MAGIC: 1033 case UFS_MAGIC_LFN: 1034 case UFS_MAGIC_FEA: 1035 case UFS_MAGIC_4GB: 1036 goto magic_found; 1037 } 1038 1039 if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP) 1040 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD) 1041 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP)) 1042 && uspi->s_sbbase < 256) { 1043 ubh_brelse_uspi(uspi); 1044 ubh = NULL; 1045 uspi->s_sbbase += 8; 1046 goto again; 1047 } 1048 if (!silent) 1049 pr_err("%s(): bad magic number\n", __func__); 1050 goto failed; 1051 1052 magic_found: 1053 /* 1054 * Check block and fragment sizes 1055 */ 1056 uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize); 1057 uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize); 1058 uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize); 1059 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask); 1060 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift); 1061 1062 if (!is_power_of_2(uspi->s_fsize)) { 1063 pr_err("%s(): fragment size %u is not a power of 2\n", 1064 __func__, uspi->s_fsize); 1065 goto failed; 1066 } 1067 if (uspi->s_fsize < 512) { 1068 pr_err("%s(): fragment size %u is too small\n", 1069 __func__, uspi->s_fsize); 1070 goto failed; 1071 } 1072 if (uspi->s_fsize > 4096) { 1073 pr_err("%s(): fragment size %u is too large\n", 1074 __func__, uspi->s_fsize); 1075 goto failed; 1076 } 1077 if (!is_power_of_2(uspi->s_bsize)) { 1078 pr_err("%s(): block size %u is not a power of 2\n", 1079 __func__, uspi->s_bsize); 1080 goto failed; 1081 } 1082 if (uspi->s_bsize < 4096) { 1083 pr_err("%s(): block size %u is too small\n", 1084 __func__, uspi->s_bsize); 1085 goto failed; 1086 } 1087 if (uspi->s_bsize / uspi->s_fsize > 8) { 1088 pr_err("%s(): too many fragments per block (%u)\n", 1089 __func__, uspi->s_bsize / uspi->s_fsize); 1090 goto failed; 1091 } 1092 if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) { 1093 ubh_brelse_uspi(uspi); 1094 ubh = NULL; 1095 block_size = uspi->s_fsize; 1096 super_block_size = uspi->s_sbsize; 1097 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size); 1098 goto again; 1099 } 1100 1101 sbi->s_flags = flags;/*after that line some functions use s_flags*/ 1102 ufs_print_super_stuff(sb, usb1, usb2, usb3); 1103 1104 /* 1105 * Check, if file system was correctly unmounted. 1106 * If not, make it read only. 1107 */ 1108 if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) || 1109 ((flags & UFS_ST_MASK) == UFS_ST_OLD) || 1110 (((flags & UFS_ST_MASK) == UFS_ST_SUN || 1111 (flags & UFS_ST_MASK) == UFS_ST_SUNOS || 1112 (flags & UFS_ST_MASK) == UFS_ST_SUNx86) && 1113 (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) { 1114 switch(usb1->fs_clean) { 1115 case UFS_FSCLEAN: 1116 UFSD("fs is clean\n"); 1117 break; 1118 case UFS_FSSTABLE: 1119 UFSD("fs is stable\n"); 1120 break; 1121 case UFS_FSLOG: 1122 UFSD("fs is logging fs\n"); 1123 break; 1124 case UFS_FSOSF1: 1125 UFSD("fs is DEC OSF/1\n"); 1126 break; 1127 case UFS_FSACTIVE: 1128 pr_err("%s(): fs is active\n", __func__); 1129 sb->s_flags |= SB_RDONLY; 1130 break; 1131 case UFS_FSBAD: 1132 pr_err("%s(): fs is bad\n", __func__); 1133 sb->s_flags |= SB_RDONLY; 1134 break; 1135 default: 1136 pr_err("%s(): can't grok fs_clean 0x%x\n", 1137 __func__, usb1->fs_clean); 1138 sb->s_flags |= SB_RDONLY; 1139 break; 1140 } 1141 } else { 1142 pr_err("%s(): fs needs fsck\n", __func__); 1143 sb->s_flags |= SB_RDONLY; 1144 } 1145 1146 /* 1147 * Read ufs_super_block into internal data structures 1148 */ 1149 sb->s_op = &ufs_super_ops; 1150 sb->s_export_op = &ufs_export_ops; 1151 1152 sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic); 1153 1154 uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno); 1155 uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno); 1156 uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno); 1157 uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno); 1158 uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset); 1159 uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask); 1160 1161 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { 1162 uspi->s_size = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size); 1163 uspi->s_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize); 1164 } else { 1165 uspi->s_size = fs32_to_cpu(sb, usb1->fs_size); 1166 uspi->s_dsize = fs32_to_cpu(sb, usb1->fs_dsize); 1167 } 1168 1169 uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg); 1170 /* s_bsize already set */ 1171 /* s_fsize already set */ 1172 uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag); 1173 uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree); 1174 uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask); 1175 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask); 1176 uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift); 1177 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift); 1178 UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift, 1179 uspi->s_fshift); 1180 uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift); 1181 uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb); 1182 /* s_sbsize already set */ 1183 uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask); 1184 uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift); 1185 uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir); 1186 uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb); 1187 uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf); 1188 uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3); 1189 uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave); 1190 uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew); 1191 1192 if (uspi->fs_magic == UFS2_MAGIC) 1193 uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr); 1194 else 1195 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr); 1196 1197 uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize); 1198 uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize); 1199 uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak); 1200 uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect); 1201 uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc); 1202 uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg); 1203 uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg); 1204 uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc); 1205 uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize); 1206 uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3); 1207 uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3); 1208 uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos); 1209 uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff); 1210 uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff); 1211 1212 uspi->s_root_blocks = mul_u64_u32_div(uspi->s_dsize, 1213 uspi->s_minfree, 100); 1214 if (uspi->s_minfree <= 5) { 1215 uspi->s_time_to_space = ~0ULL; 1216 uspi->s_space_to_time = 0; 1217 usb1->fs_optim = cpu_to_fs32(sb, UFS_OPTSPACE); 1218 } else { 1219 uspi->s_time_to_space = (uspi->s_root_blocks / 2) + 1; 1220 uspi->s_space_to_time = mul_u64_u32_div(uspi->s_dsize, 1221 uspi->s_minfree - 2, 100) - 1; 1222 } 1223 1224 /* 1225 * Compute another frequently used values 1226 */ 1227 uspi->s_fpbmask = uspi->s_fpb - 1; 1228 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) 1229 uspi->s_apbshift = uspi->s_bshift - 3; 1230 else 1231 uspi->s_apbshift = uspi->s_bshift - 2; 1232 1233 uspi->s_2apbshift = uspi->s_apbshift * 2; 1234 uspi->s_3apbshift = uspi->s_apbshift * 3; 1235 uspi->s_apb = 1 << uspi->s_apbshift; 1236 uspi->s_2apb = 1 << uspi->s_2apbshift; 1237 uspi->s_3apb = 1 << uspi->s_3apbshift; 1238 uspi->s_apbmask = uspi->s_apb - 1; 1239 uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS; 1240 uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift; 1241 uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift; 1242 uspi->s_bpf = uspi->s_fsize << 3; 1243 uspi->s_bpfshift = uspi->s_fshift + 3; 1244 uspi->s_bpfmask = uspi->s_bpf - 1; 1245 if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_44BSD || 1246 (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_UFS2) 1247 uspi->s_maxsymlinklen = 1248 fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen); 1249 1250 if (uspi->fs_magic == UFS2_MAGIC) 1251 maxsymlen = 2 * 4 * (UFS_NDADDR + UFS_NINDIR); 1252 else 1253 maxsymlen = 4 * (UFS_NDADDR + UFS_NINDIR); 1254 if (uspi->s_maxsymlinklen > maxsymlen) { 1255 ufs_warning(sb, __func__, "ufs_read_super: excessive maximum " 1256 "fast symlink size (%u)\n", uspi->s_maxsymlinklen); 1257 uspi->s_maxsymlinklen = maxsymlen; 1258 } 1259 sb->s_maxbytes = ufs_max_bytes(sb); 1260 sb->s_max_links = UFS_LINK_MAX; 1261 1262 inode = ufs_iget(sb, UFS_ROOTINO); 1263 if (IS_ERR(inode)) { 1264 ret = PTR_ERR(inode); 1265 goto failed; 1266 } 1267 sb->s_root = d_make_root(inode); 1268 if (!sb->s_root) { 1269 ret = -ENOMEM; 1270 goto failed; 1271 } 1272 1273 ufs_setup_cstotal(sb); 1274 /* 1275 * Read cylinder group structures 1276 */ 1277 if (!sb_rdonly(sb)) 1278 if (!ufs_read_cylinder_structures(sb)) 1279 goto failed; 1280 1281 UFSD("EXIT\n"); 1282 return 0; 1283 1284 failed: 1285 if (ubh) 1286 ubh_brelse_uspi (uspi); 1287 kfree (uspi); 1288 kfree(sbi); 1289 sb->s_fs_info = NULL; 1290 UFSD("EXIT (FAILED)\n"); 1291 return ret; 1292 1293 failed_nomem: 1294 UFSD("EXIT (NOMEM)\n"); 1295 return -ENOMEM; 1296 } 1297 1298 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data) 1299 { 1300 struct ufs_sb_private_info * uspi; 1301 struct ufs_super_block_first * usb1; 1302 struct ufs_super_block_third * usb3; 1303 unsigned new_mount_opt, ufstype; 1304 unsigned flags; 1305 1306 sync_filesystem(sb); 1307 mutex_lock(&UFS_SB(sb)->s_lock); 1308 uspi = UFS_SB(sb)->s_uspi; 1309 flags = UFS_SB(sb)->s_flags; 1310 usb1 = ubh_get_usb_first(uspi); 1311 usb3 = ubh_get_usb_third(uspi); 1312 1313 /* 1314 * Allow the "check" option to be passed as a remount option. 1315 * It is not possible to change ufstype option during remount 1316 */ 1317 ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE; 1318 new_mount_opt = 0; 1319 ufs_set_opt (new_mount_opt, ONERROR_LOCK); 1320 if (!ufs_parse_options (data, &new_mount_opt)) { 1321 mutex_unlock(&UFS_SB(sb)->s_lock); 1322 return -EINVAL; 1323 } 1324 if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) { 1325 new_mount_opt |= ufstype; 1326 } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) { 1327 pr_err("ufstype can't be changed during remount\n"); 1328 mutex_unlock(&UFS_SB(sb)->s_lock); 1329 return -EINVAL; 1330 } 1331 1332 if ((bool)(*mount_flags & SB_RDONLY) == sb_rdonly(sb)) { 1333 UFS_SB(sb)->s_mount_opt = new_mount_opt; 1334 mutex_unlock(&UFS_SB(sb)->s_lock); 1335 return 0; 1336 } 1337 1338 /* 1339 * fs was mouted as rw, remounting ro 1340 */ 1341 if (*mount_flags & SB_RDONLY) { 1342 ufs_put_super_internal(sb); 1343 usb1->fs_time = cpu_to_fs32(sb, get_seconds()); 1344 if ((flags & UFS_ST_MASK) == UFS_ST_SUN 1345 || (flags & UFS_ST_MASK) == UFS_ST_SUNOS 1346 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86) 1347 ufs_set_fs_state(sb, usb1, usb3, 1348 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time)); 1349 ubh_mark_buffer_dirty (USPI_UBH(uspi)); 1350 sb->s_flags |= SB_RDONLY; 1351 } else { 1352 /* 1353 * fs was mounted as ro, remounting rw 1354 */ 1355 #ifndef CONFIG_UFS_FS_WRITE 1356 pr_err("ufs was compiled with read-only support, can't be mounted as read-write\n"); 1357 mutex_unlock(&UFS_SB(sb)->s_lock); 1358 return -EINVAL; 1359 #else 1360 if (ufstype != UFS_MOUNT_UFSTYPE_SUN && 1361 ufstype != UFS_MOUNT_UFSTYPE_SUNOS && 1362 ufstype != UFS_MOUNT_UFSTYPE_44BSD && 1363 ufstype != UFS_MOUNT_UFSTYPE_SUNx86 && 1364 ufstype != UFS_MOUNT_UFSTYPE_UFS2) { 1365 pr_err("this ufstype is read-only supported\n"); 1366 mutex_unlock(&UFS_SB(sb)->s_lock); 1367 return -EINVAL; 1368 } 1369 if (!ufs_read_cylinder_structures(sb)) { 1370 pr_err("failed during remounting\n"); 1371 mutex_unlock(&UFS_SB(sb)->s_lock); 1372 return -EPERM; 1373 } 1374 sb->s_flags &= ~SB_RDONLY; 1375 #endif 1376 } 1377 UFS_SB(sb)->s_mount_opt = new_mount_opt; 1378 mutex_unlock(&UFS_SB(sb)->s_lock); 1379 return 0; 1380 } 1381 1382 static int ufs_show_options(struct seq_file *seq, struct dentry *root) 1383 { 1384 struct ufs_sb_info *sbi = UFS_SB(root->d_sb); 1385 unsigned mval = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE; 1386 const struct match_token *tp = tokens; 1387 1388 while (tp->token != Opt_onerror_panic && tp->token != mval) 1389 ++tp; 1390 BUG_ON(tp->token == Opt_onerror_panic); 1391 seq_printf(seq, ",%s", tp->pattern); 1392 1393 mval = sbi->s_mount_opt & UFS_MOUNT_ONERROR; 1394 while (tp->token != Opt_err && tp->token != mval) 1395 ++tp; 1396 BUG_ON(tp->token == Opt_err); 1397 seq_printf(seq, ",%s", tp->pattern); 1398 1399 return 0; 1400 } 1401 1402 static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf) 1403 { 1404 struct super_block *sb = dentry->d_sb; 1405 struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi; 1406 unsigned flags = UFS_SB(sb)->s_flags; 1407 struct ufs_super_block_third *usb3; 1408 u64 id = huge_encode_dev(sb->s_bdev->bd_dev); 1409 1410 mutex_lock(&UFS_SB(sb)->s_lock); 1411 usb3 = ubh_get_usb_third(uspi); 1412 1413 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) 1414 buf->f_type = UFS2_MAGIC; 1415 else 1416 buf->f_type = UFS_MAGIC; 1417 1418 buf->f_blocks = uspi->s_dsize; 1419 buf->f_bfree = ufs_freefrags(uspi); 1420 buf->f_ffree = uspi->cs_total.cs_nifree; 1421 buf->f_bsize = sb->s_blocksize; 1422 buf->f_bavail = (buf->f_bfree > uspi->s_root_blocks) 1423 ? (buf->f_bfree - uspi->s_root_blocks) : 0; 1424 buf->f_files = uspi->s_ncg * uspi->s_ipg; 1425 buf->f_namelen = UFS_MAXNAMLEN; 1426 buf->f_fsid.val[0] = (u32)id; 1427 buf->f_fsid.val[1] = (u32)(id >> 32); 1428 1429 mutex_unlock(&UFS_SB(sb)->s_lock); 1430 1431 return 0; 1432 } 1433 1434 static struct kmem_cache * ufs_inode_cachep; 1435 1436 static struct inode *ufs_alloc_inode(struct super_block *sb) 1437 { 1438 struct ufs_inode_info *ei; 1439 1440 ei = kmem_cache_alloc(ufs_inode_cachep, GFP_NOFS); 1441 if (!ei) 1442 return NULL; 1443 1444 inode_set_iversion(&ei->vfs_inode, 1); 1445 seqlock_init(&ei->meta_lock); 1446 mutex_init(&ei->truncate_mutex); 1447 return &ei->vfs_inode; 1448 } 1449 1450 static void ufs_i_callback(struct rcu_head *head) 1451 { 1452 struct inode *inode = container_of(head, struct inode, i_rcu); 1453 kmem_cache_free(ufs_inode_cachep, UFS_I(inode)); 1454 } 1455 1456 static void ufs_destroy_inode(struct inode *inode) 1457 { 1458 call_rcu(&inode->i_rcu, ufs_i_callback); 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 .destroy_inode = ufs_destroy_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