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 69 #include <linux/exportfs.h> 70 #include <linux/module.h> 71 #include <linux/bitops.h> 72 73 #include <stdarg.h> 74 75 #include <asm/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/init.h> 85 #include <linux/parser.h> 86 #include <linux/buffer_head.h> 87 #include <linux/vfs.h> 88 #include <linux/log2.h> 89 #include <linux/mount.h> 90 #include <linux/seq_file.h> 91 92 #include "ufs_fs.h" 93 #include "ufs.h" 94 #include "swab.h" 95 #include "util.h" 96 97 void lock_ufs(struct super_block *sb) 98 { 99 #if defined(CONFIG_SMP) || defined (CONFIG_PREEMPT) 100 struct ufs_sb_info *sbi = UFS_SB(sb); 101 102 mutex_lock(&sbi->mutex); 103 sbi->mutex_owner = current; 104 #endif 105 } 106 107 void unlock_ufs(struct super_block *sb) 108 { 109 #if defined(CONFIG_SMP) || defined (CONFIG_PREEMPT) 110 struct ufs_sb_info *sbi = UFS_SB(sb); 111 112 sbi->mutex_owner = NULL; 113 mutex_unlock(&sbi->mutex); 114 #endif 115 } 116 117 static struct inode *ufs_nfs_get_inode(struct super_block *sb, u64 ino, u32 generation) 118 { 119 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 120 struct inode *inode; 121 122 if (ino < UFS_ROOTINO || ino > uspi->s_ncg * uspi->s_ipg) 123 return ERR_PTR(-ESTALE); 124 125 inode = ufs_iget(sb, ino); 126 if (IS_ERR(inode)) 127 return ERR_CAST(inode); 128 if (generation && inode->i_generation != generation) { 129 iput(inode); 130 return ERR_PTR(-ESTALE); 131 } 132 return inode; 133 } 134 135 static struct dentry *ufs_fh_to_dentry(struct super_block *sb, struct fid *fid, 136 int fh_len, int fh_type) 137 { 138 return generic_fh_to_dentry(sb, fid, fh_len, fh_type, ufs_nfs_get_inode); 139 } 140 141 static struct dentry *ufs_fh_to_parent(struct super_block *sb, struct fid *fid, 142 int fh_len, int fh_type) 143 { 144 return generic_fh_to_parent(sb, fid, fh_len, fh_type, ufs_nfs_get_inode); 145 } 146 147 static struct dentry *ufs_get_parent(struct dentry *child) 148 { 149 struct qstr dot_dot = QSTR_INIT("..", 2); 150 ino_t ino; 151 152 ino = ufs_inode_by_name(child->d_inode, &dot_dot); 153 if (!ino) 154 return ERR_PTR(-ENOENT); 155 return d_obtain_alias(ufs_iget(child->d_inode->i_sb, ino)); 156 } 157 158 static const struct export_operations ufs_export_ops = { 159 .fh_to_dentry = ufs_fh_to_dentry, 160 .fh_to_parent = ufs_fh_to_parent, 161 .get_parent = ufs_get_parent, 162 }; 163 164 #ifdef CONFIG_UFS_DEBUG 165 /* 166 * Print contents of ufs_super_block, useful for debugging 167 */ 168 static void ufs_print_super_stuff(struct super_block *sb, 169 struct ufs_super_block_first *usb1, 170 struct ufs_super_block_second *usb2, 171 struct ufs_super_block_third *usb3) 172 { 173 u32 magic = fs32_to_cpu(sb, usb3->fs_magic); 174 175 printk("ufs_print_super_stuff\n"); 176 printk(" magic: 0x%x\n", magic); 177 if (fs32_to_cpu(sb, usb3->fs_magic) == UFS2_MAGIC) { 178 printk(" fs_size: %llu\n", (unsigned long long) 179 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size)); 180 printk(" fs_dsize: %llu\n", (unsigned long long) 181 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize)); 182 printk(" bsize: %u\n", 183 fs32_to_cpu(sb, usb1->fs_bsize)); 184 printk(" fsize: %u\n", 185 fs32_to_cpu(sb, usb1->fs_fsize)); 186 printk(" fs_volname: %s\n", usb2->fs_un.fs_u2.fs_volname); 187 printk(" fs_sblockloc: %llu\n", (unsigned long long) 188 fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc)); 189 printk(" cs_ndir(No of dirs): %llu\n", (unsigned long long) 190 fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir)); 191 printk(" cs_nbfree(No of free blocks): %llu\n", 192 (unsigned long long) 193 fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree)); 194 printk(KERN_INFO" cs_nifree(Num of free inodes): %llu\n", 195 (unsigned long long) 196 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree)); 197 printk(KERN_INFO" cs_nffree(Num of free frags): %llu\n", 198 (unsigned long long) 199 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree)); 200 printk(KERN_INFO" fs_maxsymlinklen: %u\n", 201 fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen)); 202 } else { 203 printk(" sblkno: %u\n", fs32_to_cpu(sb, usb1->fs_sblkno)); 204 printk(" cblkno: %u\n", fs32_to_cpu(sb, usb1->fs_cblkno)); 205 printk(" iblkno: %u\n", fs32_to_cpu(sb, usb1->fs_iblkno)); 206 printk(" dblkno: %u\n", fs32_to_cpu(sb, usb1->fs_dblkno)); 207 printk(" cgoffset: %u\n", 208 fs32_to_cpu(sb, usb1->fs_cgoffset)); 209 printk(" ~cgmask: 0x%x\n", 210 ~fs32_to_cpu(sb, usb1->fs_cgmask)); 211 printk(" size: %u\n", fs32_to_cpu(sb, usb1->fs_size)); 212 printk(" dsize: %u\n", fs32_to_cpu(sb, usb1->fs_dsize)); 213 printk(" ncg: %u\n", fs32_to_cpu(sb, usb1->fs_ncg)); 214 printk(" bsize: %u\n", fs32_to_cpu(sb, usb1->fs_bsize)); 215 printk(" fsize: %u\n", fs32_to_cpu(sb, usb1->fs_fsize)); 216 printk(" frag: %u\n", fs32_to_cpu(sb, usb1->fs_frag)); 217 printk(" fragshift: %u\n", 218 fs32_to_cpu(sb, usb1->fs_fragshift)); 219 printk(" ~fmask: %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask)); 220 printk(" fshift: %u\n", fs32_to_cpu(sb, usb1->fs_fshift)); 221 printk(" sbsize: %u\n", fs32_to_cpu(sb, usb1->fs_sbsize)); 222 printk(" spc: %u\n", fs32_to_cpu(sb, usb1->fs_spc)); 223 printk(" cpg: %u\n", fs32_to_cpu(sb, usb1->fs_cpg)); 224 printk(" ipg: %u\n", fs32_to_cpu(sb, usb1->fs_ipg)); 225 printk(" fpg: %u\n", fs32_to_cpu(sb, usb1->fs_fpg)); 226 printk(" csaddr: %u\n", fs32_to_cpu(sb, usb1->fs_csaddr)); 227 printk(" cssize: %u\n", fs32_to_cpu(sb, usb1->fs_cssize)); 228 printk(" cgsize: %u\n", fs32_to_cpu(sb, usb1->fs_cgsize)); 229 printk(" fstodb: %u\n", 230 fs32_to_cpu(sb, usb1->fs_fsbtodb)); 231 printk(" nrpos: %u\n", fs32_to_cpu(sb, usb3->fs_nrpos)); 232 printk(" ndir %u\n", 233 fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir)); 234 printk(" nifree %u\n", 235 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree)); 236 printk(" nbfree %u\n", 237 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree)); 238 printk(" nffree %u\n", 239 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree)); 240 } 241 printk("\n"); 242 } 243 244 /* 245 * Print contents of ufs_cylinder_group, useful for debugging 246 */ 247 static void ufs_print_cylinder_stuff(struct super_block *sb, 248 struct ufs_cylinder_group *cg) 249 { 250 printk("\nufs_print_cylinder_stuff\n"); 251 printk("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group)); 252 printk(" magic: %x\n", fs32_to_cpu(sb, cg->cg_magic)); 253 printk(" time: %u\n", fs32_to_cpu(sb, cg->cg_time)); 254 printk(" cgx: %u\n", fs32_to_cpu(sb, cg->cg_cgx)); 255 printk(" ncyl: %u\n", fs16_to_cpu(sb, cg->cg_ncyl)); 256 printk(" niblk: %u\n", fs16_to_cpu(sb, cg->cg_niblk)); 257 printk(" ndblk: %u\n", fs32_to_cpu(sb, cg->cg_ndblk)); 258 printk(" cs_ndir: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir)); 259 printk(" cs_nbfree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree)); 260 printk(" cs_nifree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree)); 261 printk(" cs_nffree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree)); 262 printk(" rotor: %u\n", fs32_to_cpu(sb, cg->cg_rotor)); 263 printk(" frotor: %u\n", fs32_to_cpu(sb, cg->cg_frotor)); 264 printk(" irotor: %u\n", fs32_to_cpu(sb, cg->cg_irotor)); 265 printk(" frsum: %u, %u, %u, %u, %u, %u, %u, %u\n", 266 fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]), 267 fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]), 268 fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]), 269 fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7])); 270 printk(" btotoff: %u\n", fs32_to_cpu(sb, cg->cg_btotoff)); 271 printk(" boff: %u\n", fs32_to_cpu(sb, cg->cg_boff)); 272 printk(" iuseoff: %u\n", fs32_to_cpu(sb, cg->cg_iusedoff)); 273 printk(" freeoff: %u\n", fs32_to_cpu(sb, cg->cg_freeoff)); 274 printk(" nextfreeoff: %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff)); 275 printk(" clustersumoff %u\n", 276 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff)); 277 printk(" clusteroff %u\n", 278 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff)); 279 printk(" nclusterblks %u\n", 280 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks)); 281 printk("\n"); 282 } 283 #else 284 # define ufs_print_super_stuff(sb, usb1, usb2, usb3) /**/ 285 # define ufs_print_cylinder_stuff(sb, cg) /**/ 286 #endif /* CONFIG_UFS_DEBUG */ 287 288 static const struct super_operations ufs_super_ops; 289 290 static char error_buf[1024]; 291 292 void ufs_error (struct super_block * sb, const char * function, 293 const char * fmt, ...) 294 { 295 struct ufs_sb_private_info * uspi; 296 struct ufs_super_block_first * usb1; 297 va_list args; 298 299 uspi = UFS_SB(sb)->s_uspi; 300 usb1 = ubh_get_usb_first(uspi); 301 302 if (!(sb->s_flags & MS_RDONLY)) { 303 usb1->fs_clean = UFS_FSBAD; 304 ubh_mark_buffer_dirty(USPI_UBH(uspi)); 305 ufs_mark_sb_dirty(sb); 306 sb->s_flags |= MS_RDONLY; 307 } 308 va_start (args, fmt); 309 vsnprintf (error_buf, sizeof(error_buf), fmt, args); 310 va_end (args); 311 switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) { 312 case UFS_MOUNT_ONERROR_PANIC: 313 panic ("UFS-fs panic (device %s): %s: %s\n", 314 sb->s_id, function, error_buf); 315 316 case UFS_MOUNT_ONERROR_LOCK: 317 case UFS_MOUNT_ONERROR_UMOUNT: 318 case UFS_MOUNT_ONERROR_REPAIR: 319 printk (KERN_CRIT "UFS-fs error (device %s): %s: %s\n", 320 sb->s_id, function, error_buf); 321 } 322 } 323 324 void ufs_panic (struct super_block * sb, const char * function, 325 const char * fmt, ...) 326 { 327 struct ufs_sb_private_info * uspi; 328 struct ufs_super_block_first * usb1; 329 va_list args; 330 331 uspi = UFS_SB(sb)->s_uspi; 332 usb1 = ubh_get_usb_first(uspi); 333 334 if (!(sb->s_flags & MS_RDONLY)) { 335 usb1->fs_clean = UFS_FSBAD; 336 ubh_mark_buffer_dirty(USPI_UBH(uspi)); 337 ufs_mark_sb_dirty(sb); 338 } 339 va_start (args, fmt); 340 vsnprintf (error_buf, sizeof(error_buf), fmt, args); 341 va_end (args); 342 sb->s_flags |= MS_RDONLY; 343 printk (KERN_CRIT "UFS-fs panic (device %s): %s: %s\n", 344 sb->s_id, function, error_buf); 345 } 346 347 void ufs_warning (struct super_block * sb, const char * function, 348 const char * fmt, ...) 349 { 350 va_list args; 351 352 va_start (args, fmt); 353 vsnprintf (error_buf, sizeof(error_buf), fmt, args); 354 va_end (args); 355 printk (KERN_WARNING "UFS-fs warning (device %s): %s: %s\n", 356 sb->s_id, function, error_buf); 357 } 358 359 enum { 360 Opt_type_old = UFS_MOUNT_UFSTYPE_OLD, 361 Opt_type_sunx86 = UFS_MOUNT_UFSTYPE_SUNx86, 362 Opt_type_sun = UFS_MOUNT_UFSTYPE_SUN, 363 Opt_type_sunos = UFS_MOUNT_UFSTYPE_SUNOS, 364 Opt_type_44bsd = UFS_MOUNT_UFSTYPE_44BSD, 365 Opt_type_ufs2 = UFS_MOUNT_UFSTYPE_UFS2, 366 Opt_type_hp = UFS_MOUNT_UFSTYPE_HP, 367 Opt_type_nextstepcd = UFS_MOUNT_UFSTYPE_NEXTSTEP_CD, 368 Opt_type_nextstep = UFS_MOUNT_UFSTYPE_NEXTSTEP, 369 Opt_type_openstep = UFS_MOUNT_UFSTYPE_OPENSTEP, 370 Opt_onerror_panic = UFS_MOUNT_ONERROR_PANIC, 371 Opt_onerror_lock = UFS_MOUNT_ONERROR_LOCK, 372 Opt_onerror_umount = UFS_MOUNT_ONERROR_UMOUNT, 373 Opt_onerror_repair = UFS_MOUNT_ONERROR_REPAIR, 374 Opt_err 375 }; 376 377 static const match_table_t tokens = { 378 {Opt_type_old, "ufstype=old"}, 379 {Opt_type_sunx86, "ufstype=sunx86"}, 380 {Opt_type_sun, "ufstype=sun"}, 381 {Opt_type_sunos, "ufstype=sunos"}, 382 {Opt_type_44bsd, "ufstype=44bsd"}, 383 {Opt_type_ufs2, "ufstype=ufs2"}, 384 {Opt_type_ufs2, "ufstype=5xbsd"}, 385 {Opt_type_hp, "ufstype=hp"}, 386 {Opt_type_nextstepcd, "ufstype=nextstep-cd"}, 387 {Opt_type_nextstep, "ufstype=nextstep"}, 388 {Opt_type_openstep, "ufstype=openstep"}, 389 /*end of possible ufs types */ 390 {Opt_onerror_panic, "onerror=panic"}, 391 {Opt_onerror_lock, "onerror=lock"}, 392 {Opt_onerror_umount, "onerror=umount"}, 393 {Opt_onerror_repair, "onerror=repair"}, 394 {Opt_err, NULL} 395 }; 396 397 static int ufs_parse_options (char * options, unsigned * mount_options) 398 { 399 char * p; 400 401 UFSD("ENTER\n"); 402 403 if (!options) 404 return 1; 405 406 while ((p = strsep(&options, ",")) != NULL) { 407 substring_t args[MAX_OPT_ARGS]; 408 int token; 409 if (!*p) 410 continue; 411 412 token = match_token(p, tokens, args); 413 switch (token) { 414 case Opt_type_old: 415 ufs_clear_opt (*mount_options, UFSTYPE); 416 ufs_set_opt (*mount_options, UFSTYPE_OLD); 417 break; 418 case Opt_type_sunx86: 419 ufs_clear_opt (*mount_options, UFSTYPE); 420 ufs_set_opt (*mount_options, UFSTYPE_SUNx86); 421 break; 422 case Opt_type_sun: 423 ufs_clear_opt (*mount_options, UFSTYPE); 424 ufs_set_opt (*mount_options, UFSTYPE_SUN); 425 break; 426 case Opt_type_sunos: 427 ufs_clear_opt(*mount_options, UFSTYPE); 428 ufs_set_opt(*mount_options, UFSTYPE_SUNOS); 429 break; 430 case Opt_type_44bsd: 431 ufs_clear_opt (*mount_options, UFSTYPE); 432 ufs_set_opt (*mount_options, UFSTYPE_44BSD); 433 break; 434 case Opt_type_ufs2: 435 ufs_clear_opt(*mount_options, UFSTYPE); 436 ufs_set_opt(*mount_options, UFSTYPE_UFS2); 437 break; 438 case Opt_type_hp: 439 ufs_clear_opt (*mount_options, UFSTYPE); 440 ufs_set_opt (*mount_options, UFSTYPE_HP); 441 break; 442 case Opt_type_nextstepcd: 443 ufs_clear_opt (*mount_options, UFSTYPE); 444 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD); 445 break; 446 case Opt_type_nextstep: 447 ufs_clear_opt (*mount_options, UFSTYPE); 448 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP); 449 break; 450 case Opt_type_openstep: 451 ufs_clear_opt (*mount_options, UFSTYPE); 452 ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP); 453 break; 454 case Opt_onerror_panic: 455 ufs_clear_opt (*mount_options, ONERROR); 456 ufs_set_opt (*mount_options, ONERROR_PANIC); 457 break; 458 case Opt_onerror_lock: 459 ufs_clear_opt (*mount_options, ONERROR); 460 ufs_set_opt (*mount_options, ONERROR_LOCK); 461 break; 462 case Opt_onerror_umount: 463 ufs_clear_opt (*mount_options, ONERROR); 464 ufs_set_opt (*mount_options, ONERROR_UMOUNT); 465 break; 466 case Opt_onerror_repair: 467 printk("UFS-fs: Unable to do repair on error, " 468 "will lock lock instead\n"); 469 ufs_clear_opt (*mount_options, ONERROR); 470 ufs_set_opt (*mount_options, ONERROR_REPAIR); 471 break; 472 default: 473 printk("UFS-fs: Invalid option: \"%s\" " 474 "or missing value\n", p); 475 return 0; 476 } 477 } 478 return 1; 479 } 480 481 /* 482 * Different types of UFS hold fs_cstotal in different 483 * places, and use different data structure for it. 484 * To make things simpler we just copy fs_cstotal to ufs_sb_private_info 485 */ 486 static void ufs_setup_cstotal(struct super_block *sb) 487 { 488 struct ufs_sb_info *sbi = UFS_SB(sb); 489 struct ufs_sb_private_info *uspi = sbi->s_uspi; 490 struct ufs_super_block_first *usb1; 491 struct ufs_super_block_second *usb2; 492 struct ufs_super_block_third *usb3; 493 unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE; 494 495 UFSD("ENTER, mtype=%u\n", mtype); 496 usb1 = ubh_get_usb_first(uspi); 497 usb2 = ubh_get_usb_second(uspi); 498 usb3 = ubh_get_usb_third(uspi); 499 500 if ((mtype == UFS_MOUNT_UFSTYPE_44BSD && 501 (usb1->fs_flags & UFS_FLAGS_UPDATED)) || 502 mtype == UFS_MOUNT_UFSTYPE_UFS2) { 503 /*we have statistic in different place, then usual*/ 504 uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir); 505 uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree); 506 uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree); 507 uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree); 508 } else { 509 uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir); 510 uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree); 511 uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree); 512 uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree); 513 } 514 UFSD("EXIT\n"); 515 } 516 517 /* 518 * Read on-disk structures associated with cylinder groups 519 */ 520 static int ufs_read_cylinder_structures(struct super_block *sb) 521 { 522 struct ufs_sb_info *sbi = UFS_SB(sb); 523 struct ufs_sb_private_info *uspi = sbi->s_uspi; 524 struct ufs_buffer_head * ubh; 525 unsigned char * base, * space; 526 unsigned size, blks, i; 527 struct ufs_super_block_third *usb3; 528 529 UFSD("ENTER\n"); 530 531 usb3 = ubh_get_usb_third(uspi); 532 /* 533 * Read cs structures from (usually) first data block 534 * on the device. 535 */ 536 size = uspi->s_cssize; 537 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift; 538 base = space = kmalloc(size, GFP_NOFS); 539 if (!base) 540 goto failed; 541 sbi->s_csp = (struct ufs_csum *)space; 542 for (i = 0; i < blks; i += uspi->s_fpb) { 543 size = uspi->s_bsize; 544 if (i + uspi->s_fpb > blks) 545 size = (blks - i) * uspi->s_fsize; 546 547 ubh = ubh_bread(sb, uspi->s_csaddr + i, size); 548 549 if (!ubh) 550 goto failed; 551 552 ubh_ubhcpymem (space, ubh, size); 553 554 space += size; 555 ubh_brelse (ubh); 556 ubh = NULL; 557 } 558 559 /* 560 * Read cylinder group (we read only first fragment from block 561 * at this time) and prepare internal data structures for cg caching. 562 */ 563 if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_NOFS))) 564 goto failed; 565 for (i = 0; i < uspi->s_ncg; i++) 566 sbi->s_ucg[i] = NULL; 567 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) { 568 sbi->s_ucpi[i] = NULL; 569 sbi->s_cgno[i] = UFS_CGNO_EMPTY; 570 } 571 for (i = 0; i < uspi->s_ncg; i++) { 572 UFSD("read cg %u\n", i); 573 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i)))) 574 goto failed; 575 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data)) 576 goto failed; 577 578 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data); 579 } 580 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) { 581 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_NOFS))) 582 goto failed; 583 sbi->s_cgno[i] = UFS_CGNO_EMPTY; 584 } 585 sbi->s_cg_loaded = 0; 586 UFSD("EXIT\n"); 587 return 1; 588 589 failed: 590 kfree (base); 591 if (sbi->s_ucg) { 592 for (i = 0; i < uspi->s_ncg; i++) 593 if (sbi->s_ucg[i]) 594 brelse (sbi->s_ucg[i]); 595 kfree (sbi->s_ucg); 596 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) 597 kfree (sbi->s_ucpi[i]); 598 } 599 UFSD("EXIT (FAILED)\n"); 600 return 0; 601 } 602 603 /* 604 * Sync our internal copy of fs_cstotal with disk 605 */ 606 static void ufs_put_cstotal(struct super_block *sb) 607 { 608 unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE; 609 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 610 struct ufs_super_block_first *usb1; 611 struct ufs_super_block_second *usb2; 612 struct ufs_super_block_third *usb3; 613 614 UFSD("ENTER\n"); 615 usb1 = ubh_get_usb_first(uspi); 616 usb2 = ubh_get_usb_second(uspi); 617 usb3 = ubh_get_usb_third(uspi); 618 619 if ((mtype == UFS_MOUNT_UFSTYPE_44BSD && 620 (usb1->fs_flags & UFS_FLAGS_UPDATED)) || 621 mtype == UFS_MOUNT_UFSTYPE_UFS2) { 622 /*we have statistic in different place, then usual*/ 623 usb2->fs_un.fs_u2.cs_ndir = 624 cpu_to_fs64(sb, uspi->cs_total.cs_ndir); 625 usb2->fs_un.fs_u2.cs_nbfree = 626 cpu_to_fs64(sb, uspi->cs_total.cs_nbfree); 627 usb3->fs_un1.fs_u2.cs_nifree = 628 cpu_to_fs64(sb, uspi->cs_total.cs_nifree); 629 usb3->fs_un1.fs_u2.cs_nffree = 630 cpu_to_fs64(sb, uspi->cs_total.cs_nffree); 631 } else { 632 usb1->fs_cstotal.cs_ndir = 633 cpu_to_fs32(sb, uspi->cs_total.cs_ndir); 634 usb1->fs_cstotal.cs_nbfree = 635 cpu_to_fs32(sb, uspi->cs_total.cs_nbfree); 636 usb1->fs_cstotal.cs_nifree = 637 cpu_to_fs32(sb, uspi->cs_total.cs_nifree); 638 usb1->fs_cstotal.cs_nffree = 639 cpu_to_fs32(sb, uspi->cs_total.cs_nffree); 640 } 641 ubh_mark_buffer_dirty(USPI_UBH(uspi)); 642 ufs_print_super_stuff(sb, usb1, usb2, usb3); 643 UFSD("EXIT\n"); 644 } 645 646 /** 647 * ufs_put_super_internal() - put on-disk intrenal structures 648 * @sb: pointer to super_block structure 649 * Put on-disk structures associated with cylinder groups 650 * and write them back to disk, also update cs_total on disk 651 */ 652 static void ufs_put_super_internal(struct super_block *sb) 653 { 654 struct ufs_sb_info *sbi = UFS_SB(sb); 655 struct ufs_sb_private_info *uspi = sbi->s_uspi; 656 struct ufs_buffer_head * ubh; 657 unsigned char * base, * space; 658 unsigned blks, size, i; 659 660 661 UFSD("ENTER\n"); 662 663 ufs_put_cstotal(sb); 664 size = uspi->s_cssize; 665 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift; 666 base = space = (char*) sbi->s_csp; 667 for (i = 0; i < blks; i += uspi->s_fpb) { 668 size = uspi->s_bsize; 669 if (i + uspi->s_fpb > blks) 670 size = (blks - i) * uspi->s_fsize; 671 672 ubh = ubh_bread(sb, uspi->s_csaddr + i, size); 673 674 ubh_memcpyubh (ubh, space, size); 675 space += size; 676 ubh_mark_buffer_uptodate (ubh, 1); 677 ubh_mark_buffer_dirty (ubh); 678 ubh_brelse (ubh); 679 } 680 for (i = 0; i < sbi->s_cg_loaded; i++) { 681 ufs_put_cylinder (sb, i); 682 kfree (sbi->s_ucpi[i]); 683 } 684 for (; i < UFS_MAX_GROUP_LOADED; i++) 685 kfree (sbi->s_ucpi[i]); 686 for (i = 0; i < uspi->s_ncg; i++) 687 brelse (sbi->s_ucg[i]); 688 kfree (sbi->s_ucg); 689 kfree (base); 690 691 UFSD("EXIT\n"); 692 } 693 694 static int ufs_sync_fs(struct super_block *sb, int wait) 695 { 696 struct ufs_sb_private_info * uspi; 697 struct ufs_super_block_first * usb1; 698 struct ufs_super_block_third * usb3; 699 unsigned flags; 700 701 lock_ufs(sb); 702 mutex_lock(&UFS_SB(sb)->s_lock); 703 704 UFSD("ENTER\n"); 705 706 flags = UFS_SB(sb)->s_flags; 707 uspi = UFS_SB(sb)->s_uspi; 708 usb1 = ubh_get_usb_first(uspi); 709 usb3 = ubh_get_usb_third(uspi); 710 711 usb1->fs_time = cpu_to_fs32(sb, get_seconds()); 712 if ((flags & UFS_ST_MASK) == UFS_ST_SUN || 713 (flags & UFS_ST_MASK) == UFS_ST_SUNOS || 714 (flags & UFS_ST_MASK) == UFS_ST_SUNx86) 715 ufs_set_fs_state(sb, usb1, usb3, 716 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time)); 717 ufs_put_cstotal(sb); 718 719 UFSD("EXIT\n"); 720 mutex_unlock(&UFS_SB(sb)->s_lock); 721 unlock_ufs(sb); 722 723 return 0; 724 } 725 726 static void delayed_sync_fs(struct work_struct *work) 727 { 728 struct ufs_sb_info *sbi; 729 730 sbi = container_of(work, struct ufs_sb_info, sync_work.work); 731 732 spin_lock(&sbi->work_lock); 733 sbi->work_queued = 0; 734 spin_unlock(&sbi->work_lock); 735 736 ufs_sync_fs(sbi->sb, 1); 737 } 738 739 void ufs_mark_sb_dirty(struct super_block *sb) 740 { 741 struct ufs_sb_info *sbi = UFS_SB(sb); 742 unsigned long delay; 743 744 spin_lock(&sbi->work_lock); 745 if (!sbi->work_queued) { 746 delay = msecs_to_jiffies(dirty_writeback_interval * 10); 747 queue_delayed_work(system_long_wq, &sbi->sync_work, delay); 748 sbi->work_queued = 1; 749 } 750 spin_unlock(&sbi->work_lock); 751 } 752 753 static void ufs_put_super(struct super_block *sb) 754 { 755 struct ufs_sb_info * sbi = UFS_SB(sb); 756 757 UFSD("ENTER\n"); 758 759 if (!(sb->s_flags & MS_RDONLY)) 760 ufs_put_super_internal(sb); 761 cancel_delayed_work_sync(&sbi->sync_work); 762 763 ubh_brelse_uspi (sbi->s_uspi); 764 kfree (sbi->s_uspi); 765 kfree (sbi); 766 sb->s_fs_info = NULL; 767 UFSD("EXIT\n"); 768 return; 769 } 770 771 static int ufs_fill_super(struct super_block *sb, void *data, int silent) 772 { 773 struct ufs_sb_info * sbi; 774 struct ufs_sb_private_info * uspi; 775 struct ufs_super_block_first * usb1; 776 struct ufs_super_block_second * usb2; 777 struct ufs_super_block_third * usb3; 778 struct ufs_buffer_head * ubh; 779 struct inode *inode; 780 unsigned block_size, super_block_size; 781 unsigned flags; 782 unsigned super_block_offset; 783 unsigned maxsymlen; 784 int ret = -EINVAL; 785 786 uspi = NULL; 787 ubh = NULL; 788 flags = 0; 789 790 UFSD("ENTER\n"); 791 792 sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL); 793 if (!sbi) 794 goto failed_nomem; 795 sb->s_fs_info = sbi; 796 sbi->sb = sb; 797 798 UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY)); 799 800 #ifndef CONFIG_UFS_FS_WRITE 801 if (!(sb->s_flags & MS_RDONLY)) { 802 printk("ufs was compiled with read-only support, " 803 "can't be mounted as read-write\n"); 804 goto failed; 805 } 806 #endif 807 mutex_init(&sbi->mutex); 808 mutex_init(&sbi->s_lock); 809 spin_lock_init(&sbi->work_lock); 810 INIT_DELAYED_WORK(&sbi->sync_work, delayed_sync_fs); 811 /* 812 * Set default mount options 813 * Parse mount options 814 */ 815 sbi->s_mount_opt = 0; 816 ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK); 817 if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) { 818 printk("wrong mount options\n"); 819 goto failed; 820 } 821 if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) { 822 if (!silent) 823 printk("You didn't specify the type of your ufs filesystem\n\n" 824 "mount -t ufs -o ufstype=" 825 "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n" 826 ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, " 827 "default is ufstype=old\n"); 828 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD); 829 } 830 831 uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL); 832 sbi->s_uspi = uspi; 833 if (!uspi) 834 goto failed; 835 uspi->s_dirblksize = UFS_SECTOR_SIZE; 836 super_block_offset=UFS_SBLOCK; 837 838 /* Keep 2Gig file limit. Some UFS variants need to override 839 this but as I don't know which I'll let those in the know loosen 840 the rules */ 841 switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) { 842 case UFS_MOUNT_UFSTYPE_44BSD: 843 UFSD("ufstype=44bsd\n"); 844 uspi->s_fsize = block_size = 512; 845 uspi->s_fmask = ~(512 - 1); 846 uspi->s_fshift = 9; 847 uspi->s_sbsize = super_block_size = 1536; 848 uspi->s_sbbase = 0; 849 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; 850 break; 851 case UFS_MOUNT_UFSTYPE_UFS2: 852 UFSD("ufstype=ufs2\n"); 853 super_block_offset=SBLOCK_UFS2; 854 uspi->s_fsize = block_size = 512; 855 uspi->s_fmask = ~(512 - 1); 856 uspi->s_fshift = 9; 857 uspi->s_sbsize = super_block_size = 1536; 858 uspi->s_sbbase = 0; 859 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; 860 break; 861 862 case UFS_MOUNT_UFSTYPE_SUN: 863 UFSD("ufstype=sun\n"); 864 uspi->s_fsize = block_size = 1024; 865 uspi->s_fmask = ~(1024 - 1); 866 uspi->s_fshift = 10; 867 uspi->s_sbsize = super_block_size = 2048; 868 uspi->s_sbbase = 0; 869 uspi->s_maxsymlinklen = 0; /* Not supported on disk */ 870 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN; 871 break; 872 873 case UFS_MOUNT_UFSTYPE_SUNOS: 874 UFSD(("ufstype=sunos\n")) 875 uspi->s_fsize = block_size = 1024; 876 uspi->s_fmask = ~(1024 - 1); 877 uspi->s_fshift = 10; 878 uspi->s_sbsize = 2048; 879 super_block_size = 2048; 880 uspi->s_sbbase = 0; 881 uspi->s_maxsymlinklen = 0; /* Not supported on disk */ 882 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_SUNOS | UFS_CG_SUN; 883 break; 884 885 case UFS_MOUNT_UFSTYPE_SUNx86: 886 UFSD("ufstype=sunx86\n"); 887 uspi->s_fsize = block_size = 1024; 888 uspi->s_fmask = ~(1024 - 1); 889 uspi->s_fshift = 10; 890 uspi->s_sbsize = 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_EFT | UFS_ST_SUNx86 | UFS_CG_SUN; 894 break; 895 896 case UFS_MOUNT_UFSTYPE_OLD: 897 UFSD("ufstype=old\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 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 904 if (!(sb->s_flags & MS_RDONLY)) { 905 if (!silent) 906 printk(KERN_INFO "ufstype=old is supported read-only\n"); 907 sb->s_flags |= MS_RDONLY; 908 } 909 break; 910 911 case UFS_MOUNT_UFSTYPE_NEXTSTEP: 912 UFSD("ufstype=nextstep\n"); 913 uspi->s_fsize = block_size = 1024; 914 uspi->s_fmask = ~(1024 - 1); 915 uspi->s_fshift = 10; 916 uspi->s_sbsize = super_block_size = 2048; 917 uspi->s_sbbase = 0; 918 uspi->s_dirblksize = 1024; 919 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 920 if (!(sb->s_flags & MS_RDONLY)) { 921 if (!silent) 922 printk(KERN_INFO "ufstype=nextstep is supported read-only\n"); 923 sb->s_flags |= MS_RDONLY; 924 } 925 break; 926 927 case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD: 928 UFSD("ufstype=nextstep-cd\n"); 929 uspi->s_fsize = block_size = 2048; 930 uspi->s_fmask = ~(2048 - 1); 931 uspi->s_fshift = 11; 932 uspi->s_sbsize = super_block_size = 2048; 933 uspi->s_sbbase = 0; 934 uspi->s_dirblksize = 1024; 935 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 936 if (!(sb->s_flags & MS_RDONLY)) { 937 if (!silent) 938 printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n"); 939 sb->s_flags |= MS_RDONLY; 940 } 941 break; 942 943 case UFS_MOUNT_UFSTYPE_OPENSTEP: 944 UFSD("ufstype=openstep\n"); 945 uspi->s_fsize = block_size = 1024; 946 uspi->s_fmask = ~(1024 - 1); 947 uspi->s_fshift = 10; 948 uspi->s_sbsize = super_block_size = 2048; 949 uspi->s_sbbase = 0; 950 uspi->s_dirblksize = 1024; 951 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; 952 if (!(sb->s_flags & MS_RDONLY)) { 953 if (!silent) 954 printk(KERN_INFO "ufstype=openstep is supported read-only\n"); 955 sb->s_flags |= MS_RDONLY; 956 } 957 break; 958 959 case UFS_MOUNT_UFSTYPE_HP: 960 UFSD("ufstype=hp\n"); 961 uspi->s_fsize = block_size = 1024; 962 uspi->s_fmask = ~(1024 - 1); 963 uspi->s_fshift = 10; 964 uspi->s_sbsize = super_block_size = 2048; 965 uspi->s_sbbase = 0; 966 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 967 if (!(sb->s_flags & MS_RDONLY)) { 968 if (!silent) 969 printk(KERN_INFO "ufstype=hp is supported read-only\n"); 970 sb->s_flags |= MS_RDONLY; 971 } 972 break; 973 default: 974 if (!silent) 975 printk("unknown ufstype\n"); 976 goto failed; 977 } 978 979 again: 980 if (!sb_set_blocksize(sb, block_size)) { 981 printk(KERN_ERR "UFS: failed to set blocksize\n"); 982 goto failed; 983 } 984 985 /* 986 * read ufs super block from device 987 */ 988 989 ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size); 990 991 if (!ubh) 992 goto failed; 993 994 usb1 = ubh_get_usb_first(uspi); 995 usb2 = ubh_get_usb_second(uspi); 996 usb3 = ubh_get_usb_third(uspi); 997 998 /* Sort out mod used on SunOS 4.1.3 for fs_state */ 999 uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat); 1000 if (((flags & UFS_ST_MASK) == UFS_ST_SUNOS) && 1001 (uspi->s_postblformat != UFS_42POSTBLFMT)) { 1002 flags &= ~UFS_ST_MASK; 1003 flags |= UFS_ST_SUN; 1004 } 1005 1006 /* 1007 * Check ufs magic number 1008 */ 1009 sbi->s_bytesex = BYTESEX_LE; 1010 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) { 1011 case UFS_MAGIC: 1012 case UFS_MAGIC_BW: 1013 case UFS2_MAGIC: 1014 case UFS_MAGIC_LFN: 1015 case UFS_MAGIC_FEA: 1016 case UFS_MAGIC_4GB: 1017 goto magic_found; 1018 } 1019 sbi->s_bytesex = BYTESEX_BE; 1020 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) { 1021 case UFS_MAGIC: 1022 case UFS_MAGIC_BW: 1023 case UFS2_MAGIC: 1024 case UFS_MAGIC_LFN: 1025 case UFS_MAGIC_FEA: 1026 case UFS_MAGIC_4GB: 1027 goto magic_found; 1028 } 1029 1030 if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP) 1031 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD) 1032 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP)) 1033 && uspi->s_sbbase < 256) { 1034 ubh_brelse_uspi(uspi); 1035 ubh = NULL; 1036 uspi->s_sbbase += 8; 1037 goto again; 1038 } 1039 if (!silent) 1040 printk("ufs_read_super: bad magic number\n"); 1041 goto failed; 1042 1043 magic_found: 1044 /* 1045 * Check block and fragment sizes 1046 */ 1047 uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize); 1048 uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize); 1049 uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize); 1050 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask); 1051 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift); 1052 1053 if (!is_power_of_2(uspi->s_fsize)) { 1054 printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n", 1055 uspi->s_fsize); 1056 goto failed; 1057 } 1058 if (uspi->s_fsize < 512) { 1059 printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n", 1060 uspi->s_fsize); 1061 goto failed; 1062 } 1063 if (uspi->s_fsize > 4096) { 1064 printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n", 1065 uspi->s_fsize); 1066 goto failed; 1067 } 1068 if (!is_power_of_2(uspi->s_bsize)) { 1069 printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n", 1070 uspi->s_bsize); 1071 goto failed; 1072 } 1073 if (uspi->s_bsize < 4096) { 1074 printk(KERN_ERR "ufs_read_super: block size %u is too small\n", 1075 uspi->s_bsize); 1076 goto failed; 1077 } 1078 if (uspi->s_bsize / uspi->s_fsize > 8) { 1079 printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n", 1080 uspi->s_bsize / uspi->s_fsize); 1081 goto failed; 1082 } 1083 if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) { 1084 ubh_brelse_uspi(uspi); 1085 ubh = NULL; 1086 block_size = uspi->s_fsize; 1087 super_block_size = uspi->s_sbsize; 1088 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size); 1089 goto again; 1090 } 1091 1092 sbi->s_flags = flags;/*after that line some functions use s_flags*/ 1093 ufs_print_super_stuff(sb, usb1, usb2, usb3); 1094 1095 /* 1096 * Check, if file system was correctly unmounted. 1097 * If not, make it read only. 1098 */ 1099 if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) || 1100 ((flags & UFS_ST_MASK) == UFS_ST_OLD) || 1101 (((flags & UFS_ST_MASK) == UFS_ST_SUN || 1102 (flags & UFS_ST_MASK) == UFS_ST_SUNOS || 1103 (flags & UFS_ST_MASK) == UFS_ST_SUNx86) && 1104 (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) { 1105 switch(usb1->fs_clean) { 1106 case UFS_FSCLEAN: 1107 UFSD("fs is clean\n"); 1108 break; 1109 case UFS_FSSTABLE: 1110 UFSD("fs is stable\n"); 1111 break; 1112 case UFS_FSLOG: 1113 UFSD("fs is logging fs\n"); 1114 break; 1115 case UFS_FSOSF1: 1116 UFSD("fs is DEC OSF/1\n"); 1117 break; 1118 case UFS_FSACTIVE: 1119 printk("ufs_read_super: fs is active\n"); 1120 sb->s_flags |= MS_RDONLY; 1121 break; 1122 case UFS_FSBAD: 1123 printk("ufs_read_super: fs is bad\n"); 1124 sb->s_flags |= MS_RDONLY; 1125 break; 1126 default: 1127 printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean); 1128 sb->s_flags |= MS_RDONLY; 1129 break; 1130 } 1131 } else { 1132 printk("ufs_read_super: fs needs fsck\n"); 1133 sb->s_flags |= MS_RDONLY; 1134 } 1135 1136 /* 1137 * Read ufs_super_block into internal data structures 1138 */ 1139 sb->s_op = &ufs_super_ops; 1140 sb->s_export_op = &ufs_export_ops; 1141 1142 sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic); 1143 1144 uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno); 1145 uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno); 1146 uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno); 1147 uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno); 1148 uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset); 1149 uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask); 1150 1151 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { 1152 uspi->s_u2_size = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size); 1153 uspi->s_u2_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize); 1154 } else { 1155 uspi->s_size = fs32_to_cpu(sb, usb1->fs_size); 1156 uspi->s_dsize = fs32_to_cpu(sb, usb1->fs_dsize); 1157 } 1158 1159 uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg); 1160 /* s_bsize already set */ 1161 /* s_fsize already set */ 1162 uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag); 1163 uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree); 1164 uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask); 1165 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask); 1166 uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift); 1167 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift); 1168 UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift, 1169 uspi->s_fshift); 1170 uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift); 1171 uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb); 1172 /* s_sbsize already set */ 1173 uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask); 1174 uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift); 1175 uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir); 1176 uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb); 1177 uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf); 1178 uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3); 1179 uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave); 1180 uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew); 1181 1182 if (uspi->fs_magic == UFS2_MAGIC) 1183 uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr); 1184 else 1185 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr); 1186 1187 uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize); 1188 uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize); 1189 uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak); 1190 uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect); 1191 uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc); 1192 uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg); 1193 uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg); 1194 uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc); 1195 uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize); 1196 uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3); 1197 uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3); 1198 uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos); 1199 uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff); 1200 uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff); 1201 1202 /* 1203 * Compute another frequently used values 1204 */ 1205 uspi->s_fpbmask = uspi->s_fpb - 1; 1206 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) 1207 uspi->s_apbshift = uspi->s_bshift - 3; 1208 else 1209 uspi->s_apbshift = uspi->s_bshift - 2; 1210 1211 uspi->s_2apbshift = uspi->s_apbshift * 2; 1212 uspi->s_3apbshift = uspi->s_apbshift * 3; 1213 uspi->s_apb = 1 << uspi->s_apbshift; 1214 uspi->s_2apb = 1 << uspi->s_2apbshift; 1215 uspi->s_3apb = 1 << uspi->s_3apbshift; 1216 uspi->s_apbmask = uspi->s_apb - 1; 1217 uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS; 1218 uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift; 1219 uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift; 1220 uspi->s_bpf = uspi->s_fsize << 3; 1221 uspi->s_bpfshift = uspi->s_fshift + 3; 1222 uspi->s_bpfmask = uspi->s_bpf - 1; 1223 if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_44BSD || 1224 (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_UFS2) 1225 uspi->s_maxsymlinklen = 1226 fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen); 1227 1228 if (uspi->fs_magic == UFS2_MAGIC) 1229 maxsymlen = 2 * 4 * (UFS_NDADDR + UFS_NINDIR); 1230 else 1231 maxsymlen = 4 * (UFS_NDADDR + UFS_NINDIR); 1232 if (uspi->s_maxsymlinklen > maxsymlen) { 1233 ufs_warning(sb, __func__, "ufs_read_super: excessive maximum " 1234 "fast symlink size (%u)\n", uspi->s_maxsymlinklen); 1235 uspi->s_maxsymlinklen = maxsymlen; 1236 } 1237 sb->s_max_links = UFS_LINK_MAX; 1238 1239 inode = ufs_iget(sb, UFS_ROOTINO); 1240 if (IS_ERR(inode)) { 1241 ret = PTR_ERR(inode); 1242 goto failed; 1243 } 1244 sb->s_root = d_make_root(inode); 1245 if (!sb->s_root) { 1246 ret = -ENOMEM; 1247 goto failed; 1248 } 1249 1250 ufs_setup_cstotal(sb); 1251 /* 1252 * Read cylinder group structures 1253 */ 1254 if (!(sb->s_flags & MS_RDONLY)) 1255 if (!ufs_read_cylinder_structures(sb)) 1256 goto failed; 1257 1258 UFSD("EXIT\n"); 1259 return 0; 1260 1261 failed: 1262 if (ubh) 1263 ubh_brelse_uspi (uspi); 1264 kfree (uspi); 1265 kfree(sbi); 1266 sb->s_fs_info = NULL; 1267 UFSD("EXIT (FAILED)\n"); 1268 return ret; 1269 1270 failed_nomem: 1271 UFSD("EXIT (NOMEM)\n"); 1272 return -ENOMEM; 1273 } 1274 1275 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data) 1276 { 1277 struct ufs_sb_private_info * uspi; 1278 struct ufs_super_block_first * usb1; 1279 struct ufs_super_block_third * usb3; 1280 unsigned new_mount_opt, ufstype; 1281 unsigned flags; 1282 1283 lock_ufs(sb); 1284 mutex_lock(&UFS_SB(sb)->s_lock); 1285 uspi = UFS_SB(sb)->s_uspi; 1286 flags = UFS_SB(sb)->s_flags; 1287 usb1 = ubh_get_usb_first(uspi); 1288 usb3 = ubh_get_usb_third(uspi); 1289 1290 /* 1291 * Allow the "check" option to be passed as a remount option. 1292 * It is not possible to change ufstype option during remount 1293 */ 1294 ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE; 1295 new_mount_opt = 0; 1296 ufs_set_opt (new_mount_opt, ONERROR_LOCK); 1297 if (!ufs_parse_options (data, &new_mount_opt)) { 1298 mutex_unlock(&UFS_SB(sb)->s_lock); 1299 unlock_ufs(sb); 1300 return -EINVAL; 1301 } 1302 if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) { 1303 new_mount_opt |= ufstype; 1304 } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) { 1305 printk("ufstype can't be changed during remount\n"); 1306 mutex_unlock(&UFS_SB(sb)->s_lock); 1307 unlock_ufs(sb); 1308 return -EINVAL; 1309 } 1310 1311 if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) { 1312 UFS_SB(sb)->s_mount_opt = new_mount_opt; 1313 mutex_unlock(&UFS_SB(sb)->s_lock); 1314 unlock_ufs(sb); 1315 return 0; 1316 } 1317 1318 /* 1319 * fs was mouted as rw, remounting ro 1320 */ 1321 if (*mount_flags & MS_RDONLY) { 1322 ufs_put_super_internal(sb); 1323 usb1->fs_time = cpu_to_fs32(sb, get_seconds()); 1324 if ((flags & UFS_ST_MASK) == UFS_ST_SUN 1325 || (flags & UFS_ST_MASK) == UFS_ST_SUNOS 1326 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86) 1327 ufs_set_fs_state(sb, usb1, usb3, 1328 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time)); 1329 ubh_mark_buffer_dirty (USPI_UBH(uspi)); 1330 sb->s_flags |= MS_RDONLY; 1331 } else { 1332 /* 1333 * fs was mounted as ro, remounting rw 1334 */ 1335 #ifndef CONFIG_UFS_FS_WRITE 1336 printk("ufs was compiled with read-only support, " 1337 "can't be mounted as read-write\n"); 1338 mutex_unlock(&UFS_SB(sb)->s_lock); 1339 unlock_ufs(sb); 1340 return -EINVAL; 1341 #else 1342 if (ufstype != UFS_MOUNT_UFSTYPE_SUN && 1343 ufstype != UFS_MOUNT_UFSTYPE_SUNOS && 1344 ufstype != UFS_MOUNT_UFSTYPE_44BSD && 1345 ufstype != UFS_MOUNT_UFSTYPE_SUNx86 && 1346 ufstype != UFS_MOUNT_UFSTYPE_UFS2) { 1347 printk("this ufstype is read-only supported\n"); 1348 mutex_unlock(&UFS_SB(sb)->s_lock); 1349 unlock_ufs(sb); 1350 return -EINVAL; 1351 } 1352 if (!ufs_read_cylinder_structures(sb)) { 1353 printk("failed during remounting\n"); 1354 mutex_unlock(&UFS_SB(sb)->s_lock); 1355 unlock_ufs(sb); 1356 return -EPERM; 1357 } 1358 sb->s_flags &= ~MS_RDONLY; 1359 #endif 1360 } 1361 UFS_SB(sb)->s_mount_opt = new_mount_opt; 1362 mutex_unlock(&UFS_SB(sb)->s_lock); 1363 unlock_ufs(sb); 1364 return 0; 1365 } 1366 1367 static int ufs_show_options(struct seq_file *seq, struct dentry *root) 1368 { 1369 struct ufs_sb_info *sbi = UFS_SB(root->d_sb); 1370 unsigned mval = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE; 1371 const struct match_token *tp = tokens; 1372 1373 while (tp->token != Opt_onerror_panic && tp->token != mval) 1374 ++tp; 1375 BUG_ON(tp->token == Opt_onerror_panic); 1376 seq_printf(seq, ",%s", tp->pattern); 1377 1378 mval = sbi->s_mount_opt & UFS_MOUNT_ONERROR; 1379 while (tp->token != Opt_err && tp->token != mval) 1380 ++tp; 1381 BUG_ON(tp->token == Opt_err); 1382 seq_printf(seq, ",%s", tp->pattern); 1383 1384 return 0; 1385 } 1386 1387 static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf) 1388 { 1389 struct super_block *sb = dentry->d_sb; 1390 struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi; 1391 unsigned flags = UFS_SB(sb)->s_flags; 1392 struct ufs_super_block_first *usb1; 1393 struct ufs_super_block_second *usb2; 1394 struct ufs_super_block_third *usb3; 1395 u64 id = huge_encode_dev(sb->s_bdev->bd_dev); 1396 1397 lock_ufs(sb); 1398 1399 usb1 = ubh_get_usb_first(uspi); 1400 usb2 = ubh_get_usb_second(uspi); 1401 usb3 = ubh_get_usb_third(uspi); 1402 1403 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { 1404 buf->f_type = UFS2_MAGIC; 1405 buf->f_blocks = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize); 1406 } else { 1407 buf->f_type = UFS_MAGIC; 1408 buf->f_blocks = uspi->s_dsize; 1409 } 1410 buf->f_bfree = ufs_blkstofrags(uspi->cs_total.cs_nbfree) + 1411 uspi->cs_total.cs_nffree; 1412 buf->f_ffree = uspi->cs_total.cs_nifree; 1413 buf->f_bsize = sb->s_blocksize; 1414 buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree)) 1415 ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0; 1416 buf->f_files = uspi->s_ncg * uspi->s_ipg; 1417 buf->f_namelen = UFS_MAXNAMLEN; 1418 buf->f_fsid.val[0] = (u32)id; 1419 buf->f_fsid.val[1] = (u32)(id >> 32); 1420 1421 unlock_ufs(sb); 1422 1423 return 0; 1424 } 1425 1426 static struct kmem_cache * ufs_inode_cachep; 1427 1428 static struct inode *ufs_alloc_inode(struct super_block *sb) 1429 { 1430 struct ufs_inode_info *ei; 1431 ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, GFP_NOFS); 1432 if (!ei) 1433 return NULL; 1434 ei->vfs_inode.i_version = 1; 1435 return &ei->vfs_inode; 1436 } 1437 1438 static void ufs_i_callback(struct rcu_head *head) 1439 { 1440 struct inode *inode = container_of(head, struct inode, i_rcu); 1441 kmem_cache_free(ufs_inode_cachep, UFS_I(inode)); 1442 } 1443 1444 static void ufs_destroy_inode(struct inode *inode) 1445 { 1446 call_rcu(&inode->i_rcu, ufs_i_callback); 1447 } 1448 1449 static void init_once(void *foo) 1450 { 1451 struct ufs_inode_info *ei = (struct ufs_inode_info *) foo; 1452 1453 inode_init_once(&ei->vfs_inode); 1454 } 1455 1456 static int init_inodecache(void) 1457 { 1458 ufs_inode_cachep = kmem_cache_create("ufs_inode_cache", 1459 sizeof(struct ufs_inode_info), 1460 0, (SLAB_RECLAIM_ACCOUNT| 1461 SLAB_MEM_SPREAD), 1462 init_once); 1463 if (ufs_inode_cachep == NULL) 1464 return -ENOMEM; 1465 return 0; 1466 } 1467 1468 static void destroy_inodecache(void) 1469 { 1470 /* 1471 * Make sure all delayed rcu free inodes are flushed before we 1472 * destroy cache. 1473 */ 1474 rcu_barrier(); 1475 kmem_cache_destroy(ufs_inode_cachep); 1476 } 1477 1478 static const struct super_operations ufs_super_ops = { 1479 .alloc_inode = ufs_alloc_inode, 1480 .destroy_inode = ufs_destroy_inode, 1481 .write_inode = ufs_write_inode, 1482 .evict_inode = ufs_evict_inode, 1483 .put_super = ufs_put_super, 1484 .sync_fs = ufs_sync_fs, 1485 .statfs = ufs_statfs, 1486 .remount_fs = ufs_remount, 1487 .show_options = ufs_show_options, 1488 }; 1489 1490 static struct dentry *ufs_mount(struct file_system_type *fs_type, 1491 int flags, const char *dev_name, void *data) 1492 { 1493 return mount_bdev(fs_type, flags, dev_name, data, ufs_fill_super); 1494 } 1495 1496 static struct file_system_type ufs_fs_type = { 1497 .owner = THIS_MODULE, 1498 .name = "ufs", 1499 .mount = ufs_mount, 1500 .kill_sb = kill_block_super, 1501 .fs_flags = FS_REQUIRES_DEV, 1502 }; 1503 MODULE_ALIAS_FS("ufs"); 1504 1505 static int __init init_ufs_fs(void) 1506 { 1507 int err = init_inodecache(); 1508 if (err) 1509 goto out1; 1510 err = register_filesystem(&ufs_fs_type); 1511 if (err) 1512 goto out; 1513 return 0; 1514 out: 1515 destroy_inodecache(); 1516 out1: 1517 return err; 1518 } 1519 1520 static void __exit exit_ufs_fs(void) 1521 { 1522 unregister_filesystem(&ufs_fs_type); 1523 destroy_inodecache(); 1524 } 1525 1526 module_init(init_ufs_fs) 1527 module_exit(exit_ufs_fs) 1528 MODULE_LICENSE("GPL"); 1529