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 #include <asm/system.h> 77 78 #include <linux/errno.h> 79 #include <linux/fs.h> 80 #include <linux/slab.h> 81 #include <linux/time.h> 82 #include <linux/stat.h> 83 #include <linux/string.h> 84 #include <linux/blkdev.h> 85 #include <linux/init.h> 86 #include <linux/parser.h> 87 #include <linux/buffer_head.h> 88 #include <linux/vfs.h> 89 #include <linux/log2.h> 90 #include <linux/mount.h> 91 #include <linux/seq_file.h> 92 93 #include "ufs_fs.h" 94 #include "ufs.h" 95 #include "swab.h" 96 #include "util.h" 97 98 void lock_ufs(struct super_block *sb) 99 { 100 #if defined(CONFIG_SMP) || defined (CONFIG_PREEMPT) 101 struct ufs_sb_info *sbi = UFS_SB(sb); 102 103 mutex_lock(&sbi->mutex); 104 sbi->mutex_owner = current; 105 #endif 106 } 107 108 void unlock_ufs(struct super_block *sb) 109 { 110 #if defined(CONFIG_SMP) || defined (CONFIG_PREEMPT) 111 struct ufs_sb_info *sbi = UFS_SB(sb); 112 113 sbi->mutex_owner = NULL; 114 mutex_unlock(&sbi->mutex); 115 #endif 116 } 117 118 static struct inode *ufs_nfs_get_inode(struct super_block *sb, u64 ino, u32 generation) 119 { 120 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 121 struct inode *inode; 122 123 if (ino < UFS_ROOTINO || ino > uspi->s_ncg * uspi->s_ipg) 124 return ERR_PTR(-ESTALE); 125 126 inode = ufs_iget(sb, ino); 127 if (IS_ERR(inode)) 128 return ERR_CAST(inode); 129 if (generation && inode->i_generation != generation) { 130 iput(inode); 131 return ERR_PTR(-ESTALE); 132 } 133 return inode; 134 } 135 136 static struct dentry *ufs_fh_to_dentry(struct super_block *sb, struct fid *fid, 137 int fh_len, int fh_type) 138 { 139 return generic_fh_to_dentry(sb, fid, fh_len, fh_type, ufs_nfs_get_inode); 140 } 141 142 static struct dentry *ufs_fh_to_parent(struct super_block *sb, struct fid *fid, 143 int fh_len, int fh_type) 144 { 145 return generic_fh_to_parent(sb, fid, fh_len, fh_type, ufs_nfs_get_inode); 146 } 147 148 static struct dentry *ufs_get_parent(struct dentry *child) 149 { 150 struct qstr dot_dot = { 151 .name = "..", 152 .len = 2, 153 }; 154 ino_t ino; 155 156 ino = ufs_inode_by_name(child->d_inode, &dot_dot); 157 if (!ino) 158 return ERR_PTR(-ENOENT); 159 return d_obtain_alias(ufs_iget(child->d_inode->i_sb, ino)); 160 } 161 162 static const struct export_operations ufs_export_ops = { 163 .fh_to_dentry = ufs_fh_to_dentry, 164 .fh_to_parent = ufs_fh_to_parent, 165 .get_parent = ufs_get_parent, 166 }; 167 168 #ifdef CONFIG_UFS_DEBUG 169 /* 170 * Print contents of ufs_super_block, useful for debugging 171 */ 172 static void ufs_print_super_stuff(struct super_block *sb, 173 struct ufs_super_block_first *usb1, 174 struct ufs_super_block_second *usb2, 175 struct ufs_super_block_third *usb3) 176 { 177 u32 magic = fs32_to_cpu(sb, usb3->fs_magic); 178 179 printk("ufs_print_super_stuff\n"); 180 printk(" magic: 0x%x\n", magic); 181 if (fs32_to_cpu(sb, usb3->fs_magic) == UFS2_MAGIC) { 182 printk(" fs_size: %llu\n", (unsigned long long) 183 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size)); 184 printk(" fs_dsize: %llu\n", (unsigned long long) 185 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize)); 186 printk(" bsize: %u\n", 187 fs32_to_cpu(sb, usb1->fs_bsize)); 188 printk(" fsize: %u\n", 189 fs32_to_cpu(sb, usb1->fs_fsize)); 190 printk(" fs_volname: %s\n", usb2->fs_un.fs_u2.fs_volname); 191 printk(" fs_sblockloc: %llu\n", (unsigned long long) 192 fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc)); 193 printk(" cs_ndir(No of dirs): %llu\n", (unsigned long long) 194 fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir)); 195 printk(" cs_nbfree(No of free blocks): %llu\n", 196 (unsigned long long) 197 fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree)); 198 printk(KERN_INFO" cs_nifree(Num of free inodes): %llu\n", 199 (unsigned long long) 200 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree)); 201 printk(KERN_INFO" cs_nffree(Num of free frags): %llu\n", 202 (unsigned long long) 203 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree)); 204 printk(KERN_INFO" fs_maxsymlinklen: %u\n", 205 fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen)); 206 } else { 207 printk(" sblkno: %u\n", fs32_to_cpu(sb, usb1->fs_sblkno)); 208 printk(" cblkno: %u\n", fs32_to_cpu(sb, usb1->fs_cblkno)); 209 printk(" iblkno: %u\n", fs32_to_cpu(sb, usb1->fs_iblkno)); 210 printk(" dblkno: %u\n", fs32_to_cpu(sb, usb1->fs_dblkno)); 211 printk(" cgoffset: %u\n", 212 fs32_to_cpu(sb, usb1->fs_cgoffset)); 213 printk(" ~cgmask: 0x%x\n", 214 ~fs32_to_cpu(sb, usb1->fs_cgmask)); 215 printk(" size: %u\n", fs32_to_cpu(sb, usb1->fs_size)); 216 printk(" dsize: %u\n", fs32_to_cpu(sb, usb1->fs_dsize)); 217 printk(" ncg: %u\n", fs32_to_cpu(sb, usb1->fs_ncg)); 218 printk(" bsize: %u\n", fs32_to_cpu(sb, usb1->fs_bsize)); 219 printk(" fsize: %u\n", fs32_to_cpu(sb, usb1->fs_fsize)); 220 printk(" frag: %u\n", fs32_to_cpu(sb, usb1->fs_frag)); 221 printk(" fragshift: %u\n", 222 fs32_to_cpu(sb, usb1->fs_fragshift)); 223 printk(" ~fmask: %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask)); 224 printk(" fshift: %u\n", fs32_to_cpu(sb, usb1->fs_fshift)); 225 printk(" sbsize: %u\n", fs32_to_cpu(sb, usb1->fs_sbsize)); 226 printk(" spc: %u\n", fs32_to_cpu(sb, usb1->fs_spc)); 227 printk(" cpg: %u\n", fs32_to_cpu(sb, usb1->fs_cpg)); 228 printk(" ipg: %u\n", fs32_to_cpu(sb, usb1->fs_ipg)); 229 printk(" fpg: %u\n", fs32_to_cpu(sb, usb1->fs_fpg)); 230 printk(" csaddr: %u\n", fs32_to_cpu(sb, usb1->fs_csaddr)); 231 printk(" cssize: %u\n", fs32_to_cpu(sb, usb1->fs_cssize)); 232 printk(" cgsize: %u\n", fs32_to_cpu(sb, usb1->fs_cgsize)); 233 printk(" fstodb: %u\n", 234 fs32_to_cpu(sb, usb1->fs_fsbtodb)); 235 printk(" nrpos: %u\n", fs32_to_cpu(sb, usb3->fs_nrpos)); 236 printk(" ndir %u\n", 237 fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir)); 238 printk(" nifree %u\n", 239 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree)); 240 printk(" nbfree %u\n", 241 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree)); 242 printk(" nffree %u\n", 243 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree)); 244 } 245 printk("\n"); 246 } 247 248 /* 249 * Print contents of ufs_cylinder_group, useful for debugging 250 */ 251 static void ufs_print_cylinder_stuff(struct super_block *sb, 252 struct ufs_cylinder_group *cg) 253 { 254 printk("\nufs_print_cylinder_stuff\n"); 255 printk("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group)); 256 printk(" magic: %x\n", fs32_to_cpu(sb, cg->cg_magic)); 257 printk(" time: %u\n", fs32_to_cpu(sb, cg->cg_time)); 258 printk(" cgx: %u\n", fs32_to_cpu(sb, cg->cg_cgx)); 259 printk(" ncyl: %u\n", fs16_to_cpu(sb, cg->cg_ncyl)); 260 printk(" niblk: %u\n", fs16_to_cpu(sb, cg->cg_niblk)); 261 printk(" ndblk: %u\n", fs32_to_cpu(sb, cg->cg_ndblk)); 262 printk(" cs_ndir: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir)); 263 printk(" cs_nbfree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree)); 264 printk(" cs_nifree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree)); 265 printk(" cs_nffree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree)); 266 printk(" rotor: %u\n", fs32_to_cpu(sb, cg->cg_rotor)); 267 printk(" frotor: %u\n", fs32_to_cpu(sb, cg->cg_frotor)); 268 printk(" irotor: %u\n", fs32_to_cpu(sb, cg->cg_irotor)); 269 printk(" frsum: %u, %u, %u, %u, %u, %u, %u, %u\n", 270 fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]), 271 fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]), 272 fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]), 273 fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7])); 274 printk(" btotoff: %u\n", fs32_to_cpu(sb, cg->cg_btotoff)); 275 printk(" boff: %u\n", fs32_to_cpu(sb, cg->cg_boff)); 276 printk(" iuseoff: %u\n", fs32_to_cpu(sb, cg->cg_iusedoff)); 277 printk(" freeoff: %u\n", fs32_to_cpu(sb, cg->cg_freeoff)); 278 printk(" nextfreeoff: %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff)); 279 printk(" clustersumoff %u\n", 280 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff)); 281 printk(" clusteroff %u\n", 282 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff)); 283 printk(" nclusterblks %u\n", 284 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks)); 285 printk("\n"); 286 } 287 #else 288 # define ufs_print_super_stuff(sb, usb1, usb2, usb3) /**/ 289 # define ufs_print_cylinder_stuff(sb, cg) /**/ 290 #endif /* CONFIG_UFS_DEBUG */ 291 292 static const struct super_operations ufs_super_ops; 293 294 static char error_buf[1024]; 295 296 void ufs_error (struct super_block * sb, const char * function, 297 const char * fmt, ...) 298 { 299 struct ufs_sb_private_info * uspi; 300 struct ufs_super_block_first * usb1; 301 va_list args; 302 303 uspi = UFS_SB(sb)->s_uspi; 304 usb1 = ubh_get_usb_first(uspi); 305 306 if (!(sb->s_flags & MS_RDONLY)) { 307 usb1->fs_clean = UFS_FSBAD; 308 ubh_mark_buffer_dirty(USPI_UBH(uspi)); 309 sb->s_dirt = 1; 310 sb->s_flags |= MS_RDONLY; 311 } 312 va_start (args, fmt); 313 vsnprintf (error_buf, sizeof(error_buf), fmt, args); 314 va_end (args); 315 switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) { 316 case UFS_MOUNT_ONERROR_PANIC: 317 panic ("UFS-fs panic (device %s): %s: %s\n", 318 sb->s_id, function, error_buf); 319 320 case UFS_MOUNT_ONERROR_LOCK: 321 case UFS_MOUNT_ONERROR_UMOUNT: 322 case UFS_MOUNT_ONERROR_REPAIR: 323 printk (KERN_CRIT "UFS-fs error (device %s): %s: %s\n", 324 sb->s_id, function, error_buf); 325 } 326 } 327 328 void ufs_panic (struct super_block * sb, const char * function, 329 const char * fmt, ...) 330 { 331 struct ufs_sb_private_info * uspi; 332 struct ufs_super_block_first * usb1; 333 va_list args; 334 335 uspi = UFS_SB(sb)->s_uspi; 336 usb1 = ubh_get_usb_first(uspi); 337 338 if (!(sb->s_flags & MS_RDONLY)) { 339 usb1->fs_clean = UFS_FSBAD; 340 ubh_mark_buffer_dirty(USPI_UBH(uspi)); 341 sb->s_dirt = 1; 342 } 343 va_start (args, fmt); 344 vsnprintf (error_buf, sizeof(error_buf), fmt, args); 345 va_end (args); 346 sb->s_flags |= MS_RDONLY; 347 printk (KERN_CRIT "UFS-fs panic (device %s): %s: %s\n", 348 sb->s_id, function, error_buf); 349 } 350 351 void ufs_warning (struct super_block * sb, const char * function, 352 const char * fmt, ...) 353 { 354 va_list args; 355 356 va_start (args, fmt); 357 vsnprintf (error_buf, sizeof(error_buf), fmt, args); 358 va_end (args); 359 printk (KERN_WARNING "UFS-fs warning (device %s): %s: %s\n", 360 sb->s_id, function, error_buf); 361 } 362 363 enum { 364 Opt_type_old = UFS_MOUNT_UFSTYPE_OLD, 365 Opt_type_sunx86 = UFS_MOUNT_UFSTYPE_SUNx86, 366 Opt_type_sun = UFS_MOUNT_UFSTYPE_SUN, 367 Opt_type_sunos = UFS_MOUNT_UFSTYPE_SUNOS, 368 Opt_type_44bsd = UFS_MOUNT_UFSTYPE_44BSD, 369 Opt_type_ufs2 = UFS_MOUNT_UFSTYPE_UFS2, 370 Opt_type_hp = UFS_MOUNT_UFSTYPE_HP, 371 Opt_type_nextstepcd = UFS_MOUNT_UFSTYPE_NEXTSTEP_CD, 372 Opt_type_nextstep = UFS_MOUNT_UFSTYPE_NEXTSTEP, 373 Opt_type_openstep = UFS_MOUNT_UFSTYPE_OPENSTEP, 374 Opt_onerror_panic = UFS_MOUNT_ONERROR_PANIC, 375 Opt_onerror_lock = UFS_MOUNT_ONERROR_LOCK, 376 Opt_onerror_umount = UFS_MOUNT_ONERROR_UMOUNT, 377 Opt_onerror_repair = UFS_MOUNT_ONERROR_REPAIR, 378 Opt_err 379 }; 380 381 static const match_table_t tokens = { 382 {Opt_type_old, "ufstype=old"}, 383 {Opt_type_sunx86, "ufstype=sunx86"}, 384 {Opt_type_sun, "ufstype=sun"}, 385 {Opt_type_sunos, "ufstype=sunos"}, 386 {Opt_type_44bsd, "ufstype=44bsd"}, 387 {Opt_type_ufs2, "ufstype=ufs2"}, 388 {Opt_type_ufs2, "ufstype=5xbsd"}, 389 {Opt_type_hp, "ufstype=hp"}, 390 {Opt_type_nextstepcd, "ufstype=nextstep-cd"}, 391 {Opt_type_nextstep, "ufstype=nextstep"}, 392 {Opt_type_openstep, "ufstype=openstep"}, 393 /*end of possible ufs types */ 394 {Opt_onerror_panic, "onerror=panic"}, 395 {Opt_onerror_lock, "onerror=lock"}, 396 {Opt_onerror_umount, "onerror=umount"}, 397 {Opt_onerror_repair, "onerror=repair"}, 398 {Opt_err, NULL} 399 }; 400 401 static int ufs_parse_options (char * options, unsigned * mount_options) 402 { 403 char * p; 404 405 UFSD("ENTER\n"); 406 407 if (!options) 408 return 1; 409 410 while ((p = strsep(&options, ",")) != NULL) { 411 substring_t args[MAX_OPT_ARGS]; 412 int token; 413 if (!*p) 414 continue; 415 416 token = match_token(p, tokens, args); 417 switch (token) { 418 case Opt_type_old: 419 ufs_clear_opt (*mount_options, UFSTYPE); 420 ufs_set_opt (*mount_options, UFSTYPE_OLD); 421 break; 422 case Opt_type_sunx86: 423 ufs_clear_opt (*mount_options, UFSTYPE); 424 ufs_set_opt (*mount_options, UFSTYPE_SUNx86); 425 break; 426 case Opt_type_sun: 427 ufs_clear_opt (*mount_options, UFSTYPE); 428 ufs_set_opt (*mount_options, UFSTYPE_SUN); 429 break; 430 case Opt_type_sunos: 431 ufs_clear_opt(*mount_options, UFSTYPE); 432 ufs_set_opt(*mount_options, UFSTYPE_SUNOS); 433 break; 434 case Opt_type_44bsd: 435 ufs_clear_opt (*mount_options, UFSTYPE); 436 ufs_set_opt (*mount_options, UFSTYPE_44BSD); 437 break; 438 case Opt_type_ufs2: 439 ufs_clear_opt(*mount_options, UFSTYPE); 440 ufs_set_opt(*mount_options, UFSTYPE_UFS2); 441 break; 442 case Opt_type_hp: 443 ufs_clear_opt (*mount_options, UFSTYPE); 444 ufs_set_opt (*mount_options, UFSTYPE_HP); 445 break; 446 case Opt_type_nextstepcd: 447 ufs_clear_opt (*mount_options, UFSTYPE); 448 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD); 449 break; 450 case Opt_type_nextstep: 451 ufs_clear_opt (*mount_options, UFSTYPE); 452 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP); 453 break; 454 case Opt_type_openstep: 455 ufs_clear_opt (*mount_options, UFSTYPE); 456 ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP); 457 break; 458 case Opt_onerror_panic: 459 ufs_clear_opt (*mount_options, ONERROR); 460 ufs_set_opt (*mount_options, ONERROR_PANIC); 461 break; 462 case Opt_onerror_lock: 463 ufs_clear_opt (*mount_options, ONERROR); 464 ufs_set_opt (*mount_options, ONERROR_LOCK); 465 break; 466 case Opt_onerror_umount: 467 ufs_clear_opt (*mount_options, ONERROR); 468 ufs_set_opt (*mount_options, ONERROR_UMOUNT); 469 break; 470 case Opt_onerror_repair: 471 printk("UFS-fs: Unable to do repair on error, " 472 "will lock lock instead\n"); 473 ufs_clear_opt (*mount_options, ONERROR); 474 ufs_set_opt (*mount_options, ONERROR_REPAIR); 475 break; 476 default: 477 printk("UFS-fs: Invalid option: \"%s\" " 478 "or missing value\n", p); 479 return 0; 480 } 481 } 482 return 1; 483 } 484 485 /* 486 * Diffrent types of UFS hold fs_cstotal in different 487 * places, and use diffrent data structure for it. 488 * To make things simplier we just copy fs_cstotal to ufs_sb_private_info 489 */ 490 static void ufs_setup_cstotal(struct super_block *sb) 491 { 492 struct ufs_sb_info *sbi = UFS_SB(sb); 493 struct ufs_sb_private_info *uspi = sbi->s_uspi; 494 struct ufs_super_block_first *usb1; 495 struct ufs_super_block_second *usb2; 496 struct ufs_super_block_third *usb3; 497 unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE; 498 499 UFSD("ENTER, mtype=%u\n", mtype); 500 usb1 = ubh_get_usb_first(uspi); 501 usb2 = ubh_get_usb_second(uspi); 502 usb3 = ubh_get_usb_third(uspi); 503 504 if ((mtype == UFS_MOUNT_UFSTYPE_44BSD && 505 (usb1->fs_flags & UFS_FLAGS_UPDATED)) || 506 mtype == UFS_MOUNT_UFSTYPE_UFS2) { 507 /*we have statistic in different place, then usual*/ 508 uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir); 509 uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree); 510 uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree); 511 uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree); 512 } else { 513 uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir); 514 uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree); 515 uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree); 516 uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree); 517 } 518 UFSD("EXIT\n"); 519 } 520 521 /* 522 * Read on-disk structures associated with cylinder groups 523 */ 524 static int ufs_read_cylinder_structures(struct super_block *sb) 525 { 526 struct ufs_sb_info *sbi = UFS_SB(sb); 527 struct ufs_sb_private_info *uspi = sbi->s_uspi; 528 struct ufs_buffer_head * ubh; 529 unsigned char * base, * space; 530 unsigned size, blks, i; 531 struct ufs_super_block_third *usb3; 532 533 UFSD("ENTER\n"); 534 535 usb3 = ubh_get_usb_third(uspi); 536 /* 537 * Read cs structures from (usually) first data block 538 * on the device. 539 */ 540 size = uspi->s_cssize; 541 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift; 542 base = space = kmalloc(size, GFP_NOFS); 543 if (!base) 544 goto failed; 545 sbi->s_csp = (struct ufs_csum *)space; 546 for (i = 0; i < blks; i += uspi->s_fpb) { 547 size = uspi->s_bsize; 548 if (i + uspi->s_fpb > blks) 549 size = (blks - i) * uspi->s_fsize; 550 551 ubh = ubh_bread(sb, uspi->s_csaddr + i, size); 552 553 if (!ubh) 554 goto failed; 555 556 ubh_ubhcpymem (space, ubh, size); 557 558 space += size; 559 ubh_brelse (ubh); 560 ubh = NULL; 561 } 562 563 /* 564 * Read cylinder group (we read only first fragment from block 565 * at this time) and prepare internal data structures for cg caching. 566 */ 567 if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_NOFS))) 568 goto failed; 569 for (i = 0; i < uspi->s_ncg; i++) 570 sbi->s_ucg[i] = NULL; 571 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) { 572 sbi->s_ucpi[i] = NULL; 573 sbi->s_cgno[i] = UFS_CGNO_EMPTY; 574 } 575 for (i = 0; i < uspi->s_ncg; i++) { 576 UFSD("read cg %u\n", i); 577 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i)))) 578 goto failed; 579 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data)) 580 goto failed; 581 582 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data); 583 } 584 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) { 585 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_NOFS))) 586 goto failed; 587 sbi->s_cgno[i] = UFS_CGNO_EMPTY; 588 } 589 sbi->s_cg_loaded = 0; 590 UFSD("EXIT\n"); 591 return 1; 592 593 failed: 594 kfree (base); 595 if (sbi->s_ucg) { 596 for (i = 0; i < uspi->s_ncg; i++) 597 if (sbi->s_ucg[i]) 598 brelse (sbi->s_ucg[i]); 599 kfree (sbi->s_ucg); 600 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) 601 kfree (sbi->s_ucpi[i]); 602 } 603 UFSD("EXIT (FAILED)\n"); 604 return 0; 605 } 606 607 /* 608 * Sync our internal copy of fs_cstotal with disk 609 */ 610 static void ufs_put_cstotal(struct super_block *sb) 611 { 612 unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE; 613 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 614 struct ufs_super_block_first *usb1; 615 struct ufs_super_block_second *usb2; 616 struct ufs_super_block_third *usb3; 617 618 UFSD("ENTER\n"); 619 usb1 = ubh_get_usb_first(uspi); 620 usb2 = ubh_get_usb_second(uspi); 621 usb3 = ubh_get_usb_third(uspi); 622 623 if ((mtype == UFS_MOUNT_UFSTYPE_44BSD && 624 (usb1->fs_flags & UFS_FLAGS_UPDATED)) || 625 mtype == UFS_MOUNT_UFSTYPE_UFS2) { 626 /*we have statistic in different place, then usual*/ 627 usb2->fs_un.fs_u2.cs_ndir = 628 cpu_to_fs64(sb, uspi->cs_total.cs_ndir); 629 usb2->fs_un.fs_u2.cs_nbfree = 630 cpu_to_fs64(sb, uspi->cs_total.cs_nbfree); 631 usb3->fs_un1.fs_u2.cs_nifree = 632 cpu_to_fs64(sb, uspi->cs_total.cs_nifree); 633 usb3->fs_un1.fs_u2.cs_nffree = 634 cpu_to_fs64(sb, uspi->cs_total.cs_nffree); 635 } else { 636 usb1->fs_cstotal.cs_ndir = 637 cpu_to_fs32(sb, uspi->cs_total.cs_ndir); 638 usb1->fs_cstotal.cs_nbfree = 639 cpu_to_fs32(sb, uspi->cs_total.cs_nbfree); 640 usb1->fs_cstotal.cs_nifree = 641 cpu_to_fs32(sb, uspi->cs_total.cs_nifree); 642 usb1->fs_cstotal.cs_nffree = 643 cpu_to_fs32(sb, uspi->cs_total.cs_nffree); 644 } 645 ubh_mark_buffer_dirty(USPI_UBH(uspi)); 646 ufs_print_super_stuff(sb, usb1, usb2, usb3); 647 UFSD("EXIT\n"); 648 } 649 650 /** 651 * ufs_put_super_internal() - put on-disk intrenal structures 652 * @sb: pointer to super_block structure 653 * Put on-disk structures associated with cylinder groups 654 * and write them back to disk, also update cs_total on disk 655 */ 656 static void ufs_put_super_internal(struct super_block *sb) 657 { 658 struct ufs_sb_info *sbi = UFS_SB(sb); 659 struct ufs_sb_private_info *uspi = sbi->s_uspi; 660 struct ufs_buffer_head * ubh; 661 unsigned char * base, * space; 662 unsigned blks, size, i; 663 664 665 UFSD("ENTER\n"); 666 667 ufs_put_cstotal(sb); 668 size = uspi->s_cssize; 669 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift; 670 base = space = (char*) sbi->s_csp; 671 for (i = 0; i < blks; i += uspi->s_fpb) { 672 size = uspi->s_bsize; 673 if (i + uspi->s_fpb > blks) 674 size = (blks - i) * uspi->s_fsize; 675 676 ubh = ubh_bread(sb, uspi->s_csaddr + i, size); 677 678 ubh_memcpyubh (ubh, space, size); 679 space += size; 680 ubh_mark_buffer_uptodate (ubh, 1); 681 ubh_mark_buffer_dirty (ubh); 682 ubh_brelse (ubh); 683 } 684 for (i = 0; i < sbi->s_cg_loaded; i++) { 685 ufs_put_cylinder (sb, i); 686 kfree (sbi->s_ucpi[i]); 687 } 688 for (; i < UFS_MAX_GROUP_LOADED; i++) 689 kfree (sbi->s_ucpi[i]); 690 for (i = 0; i < uspi->s_ncg; i++) 691 brelse (sbi->s_ucg[i]); 692 kfree (sbi->s_ucg); 693 kfree (base); 694 695 UFSD("EXIT\n"); 696 } 697 698 static int ufs_fill_super(struct super_block *sb, void *data, int silent) 699 { 700 struct ufs_sb_info * sbi; 701 struct ufs_sb_private_info * uspi; 702 struct ufs_super_block_first * usb1; 703 struct ufs_super_block_second * usb2; 704 struct ufs_super_block_third * usb3; 705 struct ufs_buffer_head * ubh; 706 struct inode *inode; 707 unsigned block_size, super_block_size; 708 unsigned flags; 709 unsigned super_block_offset; 710 unsigned maxsymlen; 711 int ret = -EINVAL; 712 713 uspi = NULL; 714 ubh = NULL; 715 flags = 0; 716 717 UFSD("ENTER\n"); 718 719 sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL); 720 if (!sbi) 721 goto failed_nomem; 722 sb->s_fs_info = sbi; 723 724 UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY)); 725 726 #ifndef CONFIG_UFS_FS_WRITE 727 if (!(sb->s_flags & MS_RDONLY)) { 728 printk("ufs was compiled with read-only support, " 729 "can't be mounted as read-write\n"); 730 goto failed; 731 } 732 #endif 733 mutex_init(&sbi->mutex); 734 /* 735 * Set default mount options 736 * Parse mount options 737 */ 738 sbi->s_mount_opt = 0; 739 ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK); 740 if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) { 741 printk("wrong mount options\n"); 742 goto failed; 743 } 744 if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) { 745 if (!silent) 746 printk("You didn't specify the type of your ufs filesystem\n\n" 747 "mount -t ufs -o ufstype=" 748 "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n" 749 ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, " 750 "default is ufstype=old\n"); 751 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD); 752 } 753 754 uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL); 755 sbi->s_uspi = uspi; 756 if (!uspi) 757 goto failed; 758 uspi->s_dirblksize = UFS_SECTOR_SIZE; 759 super_block_offset=UFS_SBLOCK; 760 761 /* Keep 2Gig file limit. Some UFS variants need to override 762 this but as I don't know which I'll let those in the know loosen 763 the rules */ 764 switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) { 765 case UFS_MOUNT_UFSTYPE_44BSD: 766 UFSD("ufstype=44bsd\n"); 767 uspi->s_fsize = block_size = 512; 768 uspi->s_fmask = ~(512 - 1); 769 uspi->s_fshift = 9; 770 uspi->s_sbsize = super_block_size = 1536; 771 uspi->s_sbbase = 0; 772 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; 773 break; 774 case UFS_MOUNT_UFSTYPE_UFS2: 775 UFSD("ufstype=ufs2\n"); 776 super_block_offset=SBLOCK_UFS2; 777 uspi->s_fsize = block_size = 512; 778 uspi->s_fmask = ~(512 - 1); 779 uspi->s_fshift = 9; 780 uspi->s_sbsize = super_block_size = 1536; 781 uspi->s_sbbase = 0; 782 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; 783 break; 784 785 case UFS_MOUNT_UFSTYPE_SUN: 786 UFSD("ufstype=sun\n"); 787 uspi->s_fsize = block_size = 1024; 788 uspi->s_fmask = ~(1024 - 1); 789 uspi->s_fshift = 10; 790 uspi->s_sbsize = super_block_size = 2048; 791 uspi->s_sbbase = 0; 792 uspi->s_maxsymlinklen = 0; /* Not supported on disk */ 793 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN; 794 break; 795 796 case UFS_MOUNT_UFSTYPE_SUNOS: 797 UFSD(("ufstype=sunos\n")) 798 uspi->s_fsize = block_size = 1024; 799 uspi->s_fmask = ~(1024 - 1); 800 uspi->s_fshift = 10; 801 uspi->s_sbsize = 2048; 802 super_block_size = 2048; 803 uspi->s_sbbase = 0; 804 uspi->s_maxsymlinklen = 0; /* Not supported on disk */ 805 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_SUNOS | UFS_CG_SUN; 806 break; 807 808 case UFS_MOUNT_UFSTYPE_SUNx86: 809 UFSD("ufstype=sunx86\n"); 810 uspi->s_fsize = block_size = 1024; 811 uspi->s_fmask = ~(1024 - 1); 812 uspi->s_fshift = 10; 813 uspi->s_sbsize = super_block_size = 2048; 814 uspi->s_sbbase = 0; 815 uspi->s_maxsymlinklen = 0; /* Not supported on disk */ 816 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN; 817 break; 818 819 case UFS_MOUNT_UFSTYPE_OLD: 820 UFSD("ufstype=old\n"); 821 uspi->s_fsize = block_size = 1024; 822 uspi->s_fmask = ~(1024 - 1); 823 uspi->s_fshift = 10; 824 uspi->s_sbsize = super_block_size = 2048; 825 uspi->s_sbbase = 0; 826 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 827 if (!(sb->s_flags & MS_RDONLY)) { 828 if (!silent) 829 printk(KERN_INFO "ufstype=old is supported read-only\n"); 830 sb->s_flags |= MS_RDONLY; 831 } 832 break; 833 834 case UFS_MOUNT_UFSTYPE_NEXTSTEP: 835 UFSD("ufstype=nextstep\n"); 836 uspi->s_fsize = block_size = 1024; 837 uspi->s_fmask = ~(1024 - 1); 838 uspi->s_fshift = 10; 839 uspi->s_sbsize = super_block_size = 2048; 840 uspi->s_sbbase = 0; 841 uspi->s_dirblksize = 1024; 842 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 843 if (!(sb->s_flags & MS_RDONLY)) { 844 if (!silent) 845 printk(KERN_INFO "ufstype=nextstep is supported read-only\n"); 846 sb->s_flags |= MS_RDONLY; 847 } 848 break; 849 850 case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD: 851 UFSD("ufstype=nextstep-cd\n"); 852 uspi->s_fsize = block_size = 2048; 853 uspi->s_fmask = ~(2048 - 1); 854 uspi->s_fshift = 11; 855 uspi->s_sbsize = super_block_size = 2048; 856 uspi->s_sbbase = 0; 857 uspi->s_dirblksize = 1024; 858 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 859 if (!(sb->s_flags & MS_RDONLY)) { 860 if (!silent) 861 printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n"); 862 sb->s_flags |= MS_RDONLY; 863 } 864 break; 865 866 case UFS_MOUNT_UFSTYPE_OPENSTEP: 867 UFSD("ufstype=openstep\n"); 868 uspi->s_fsize = block_size = 1024; 869 uspi->s_fmask = ~(1024 - 1); 870 uspi->s_fshift = 10; 871 uspi->s_sbsize = super_block_size = 2048; 872 uspi->s_sbbase = 0; 873 uspi->s_dirblksize = 1024; 874 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; 875 if (!(sb->s_flags & MS_RDONLY)) { 876 if (!silent) 877 printk(KERN_INFO "ufstype=openstep is supported read-only\n"); 878 sb->s_flags |= MS_RDONLY; 879 } 880 break; 881 882 case UFS_MOUNT_UFSTYPE_HP: 883 UFSD("ufstype=hp\n"); 884 uspi->s_fsize = block_size = 1024; 885 uspi->s_fmask = ~(1024 - 1); 886 uspi->s_fshift = 10; 887 uspi->s_sbsize = super_block_size = 2048; 888 uspi->s_sbbase = 0; 889 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 890 if (!(sb->s_flags & MS_RDONLY)) { 891 if (!silent) 892 printk(KERN_INFO "ufstype=hp is supported read-only\n"); 893 sb->s_flags |= MS_RDONLY; 894 } 895 break; 896 default: 897 if (!silent) 898 printk("unknown ufstype\n"); 899 goto failed; 900 } 901 902 again: 903 if (!sb_set_blocksize(sb, block_size)) { 904 printk(KERN_ERR "UFS: failed to set blocksize\n"); 905 goto failed; 906 } 907 908 /* 909 * read ufs super block from device 910 */ 911 912 ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size); 913 914 if (!ubh) 915 goto failed; 916 917 usb1 = ubh_get_usb_first(uspi); 918 usb2 = ubh_get_usb_second(uspi); 919 usb3 = ubh_get_usb_third(uspi); 920 921 /* Sort out mod used on SunOS 4.1.3 for fs_state */ 922 uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat); 923 if (((flags & UFS_ST_MASK) == UFS_ST_SUNOS) && 924 (uspi->s_postblformat != UFS_42POSTBLFMT)) { 925 flags &= ~UFS_ST_MASK; 926 flags |= UFS_ST_SUN; 927 } 928 929 /* 930 * Check ufs magic number 931 */ 932 sbi->s_bytesex = BYTESEX_LE; 933 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) { 934 case UFS_MAGIC: 935 case UFS_MAGIC_BW: 936 case UFS2_MAGIC: 937 case UFS_MAGIC_LFN: 938 case UFS_MAGIC_FEA: 939 case UFS_MAGIC_4GB: 940 goto magic_found; 941 } 942 sbi->s_bytesex = BYTESEX_BE; 943 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) { 944 case UFS_MAGIC: 945 case UFS_MAGIC_BW: 946 case UFS2_MAGIC: 947 case UFS_MAGIC_LFN: 948 case UFS_MAGIC_FEA: 949 case UFS_MAGIC_4GB: 950 goto magic_found; 951 } 952 953 if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP) 954 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD) 955 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP)) 956 && uspi->s_sbbase < 256) { 957 ubh_brelse_uspi(uspi); 958 ubh = NULL; 959 uspi->s_sbbase += 8; 960 goto again; 961 } 962 if (!silent) 963 printk("ufs_read_super: bad magic number\n"); 964 goto failed; 965 966 magic_found: 967 /* 968 * Check block and fragment sizes 969 */ 970 uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize); 971 uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize); 972 uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize); 973 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask); 974 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift); 975 976 if (!is_power_of_2(uspi->s_fsize)) { 977 printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n", 978 uspi->s_fsize); 979 goto failed; 980 } 981 if (uspi->s_fsize < 512) { 982 printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n", 983 uspi->s_fsize); 984 goto failed; 985 } 986 if (uspi->s_fsize > 4096) { 987 printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n", 988 uspi->s_fsize); 989 goto failed; 990 } 991 if (!is_power_of_2(uspi->s_bsize)) { 992 printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n", 993 uspi->s_bsize); 994 goto failed; 995 } 996 if (uspi->s_bsize < 4096) { 997 printk(KERN_ERR "ufs_read_super: block size %u is too small\n", 998 uspi->s_bsize); 999 goto failed; 1000 } 1001 if (uspi->s_bsize / uspi->s_fsize > 8) { 1002 printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n", 1003 uspi->s_bsize / uspi->s_fsize); 1004 goto failed; 1005 } 1006 if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) { 1007 ubh_brelse_uspi(uspi); 1008 ubh = NULL; 1009 block_size = uspi->s_fsize; 1010 super_block_size = uspi->s_sbsize; 1011 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size); 1012 goto again; 1013 } 1014 1015 sbi->s_flags = flags;/*after that line some functions use s_flags*/ 1016 ufs_print_super_stuff(sb, usb1, usb2, usb3); 1017 1018 /* 1019 * Check, if file system was correctly unmounted. 1020 * If not, make it read only. 1021 */ 1022 if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) || 1023 ((flags & UFS_ST_MASK) == UFS_ST_OLD) || 1024 (((flags & UFS_ST_MASK) == UFS_ST_SUN || 1025 (flags & UFS_ST_MASK) == UFS_ST_SUNOS || 1026 (flags & UFS_ST_MASK) == UFS_ST_SUNx86) && 1027 (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) { 1028 switch(usb1->fs_clean) { 1029 case UFS_FSCLEAN: 1030 UFSD("fs is clean\n"); 1031 break; 1032 case UFS_FSSTABLE: 1033 UFSD("fs is stable\n"); 1034 break; 1035 case UFS_FSLOG: 1036 UFSD("fs is logging fs\n"); 1037 break; 1038 case UFS_FSOSF1: 1039 UFSD("fs is DEC OSF/1\n"); 1040 break; 1041 case UFS_FSACTIVE: 1042 printk("ufs_read_super: fs is active\n"); 1043 sb->s_flags |= MS_RDONLY; 1044 break; 1045 case UFS_FSBAD: 1046 printk("ufs_read_super: fs is bad\n"); 1047 sb->s_flags |= MS_RDONLY; 1048 break; 1049 default: 1050 printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean); 1051 sb->s_flags |= MS_RDONLY; 1052 break; 1053 } 1054 } else { 1055 printk("ufs_read_super: fs needs fsck\n"); 1056 sb->s_flags |= MS_RDONLY; 1057 } 1058 1059 /* 1060 * Read ufs_super_block into internal data structures 1061 */ 1062 sb->s_op = &ufs_super_ops; 1063 sb->s_export_op = &ufs_export_ops; 1064 1065 sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic); 1066 1067 uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno); 1068 uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno); 1069 uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno); 1070 uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno); 1071 uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset); 1072 uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask); 1073 1074 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { 1075 uspi->s_u2_size = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size); 1076 uspi->s_u2_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize); 1077 } else { 1078 uspi->s_size = fs32_to_cpu(sb, usb1->fs_size); 1079 uspi->s_dsize = fs32_to_cpu(sb, usb1->fs_dsize); 1080 } 1081 1082 uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg); 1083 /* s_bsize already set */ 1084 /* s_fsize already set */ 1085 uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag); 1086 uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree); 1087 uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask); 1088 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask); 1089 uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift); 1090 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift); 1091 UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift, 1092 uspi->s_fshift); 1093 uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift); 1094 uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb); 1095 /* s_sbsize already set */ 1096 uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask); 1097 uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift); 1098 uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir); 1099 uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb); 1100 uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf); 1101 uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3); 1102 uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave); 1103 uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew); 1104 1105 if (uspi->fs_magic == UFS2_MAGIC) 1106 uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr); 1107 else 1108 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr); 1109 1110 uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize); 1111 uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize); 1112 uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak); 1113 uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect); 1114 uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc); 1115 uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg); 1116 uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg); 1117 uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc); 1118 uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize); 1119 uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3); 1120 uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3); 1121 uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos); 1122 uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff); 1123 uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff); 1124 1125 /* 1126 * Compute another frequently used values 1127 */ 1128 uspi->s_fpbmask = uspi->s_fpb - 1; 1129 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) 1130 uspi->s_apbshift = uspi->s_bshift - 3; 1131 else 1132 uspi->s_apbshift = uspi->s_bshift - 2; 1133 1134 uspi->s_2apbshift = uspi->s_apbshift * 2; 1135 uspi->s_3apbshift = uspi->s_apbshift * 3; 1136 uspi->s_apb = 1 << uspi->s_apbshift; 1137 uspi->s_2apb = 1 << uspi->s_2apbshift; 1138 uspi->s_3apb = 1 << uspi->s_3apbshift; 1139 uspi->s_apbmask = uspi->s_apb - 1; 1140 uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS; 1141 uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift; 1142 uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift; 1143 uspi->s_bpf = uspi->s_fsize << 3; 1144 uspi->s_bpfshift = uspi->s_fshift + 3; 1145 uspi->s_bpfmask = uspi->s_bpf - 1; 1146 if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_44BSD || 1147 (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_UFS2) 1148 uspi->s_maxsymlinklen = 1149 fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen); 1150 1151 if (uspi->fs_magic == UFS2_MAGIC) 1152 maxsymlen = 2 * 4 * (UFS_NDADDR + UFS_NINDIR); 1153 else 1154 maxsymlen = 4 * (UFS_NDADDR + UFS_NINDIR); 1155 if (uspi->s_maxsymlinklen > maxsymlen) { 1156 ufs_warning(sb, __func__, "ufs_read_super: excessive maximum " 1157 "fast symlink size (%u)\n", uspi->s_maxsymlinklen); 1158 uspi->s_maxsymlinklen = maxsymlen; 1159 } 1160 1161 inode = ufs_iget(sb, UFS_ROOTINO); 1162 if (IS_ERR(inode)) { 1163 ret = PTR_ERR(inode); 1164 goto failed; 1165 } 1166 sb->s_root = d_alloc_root(inode); 1167 if (!sb->s_root) { 1168 ret = -ENOMEM; 1169 goto dalloc_failed; 1170 } 1171 1172 ufs_setup_cstotal(sb); 1173 /* 1174 * Read cylinder group structures 1175 */ 1176 if (!(sb->s_flags & MS_RDONLY)) 1177 if (!ufs_read_cylinder_structures(sb)) 1178 goto failed; 1179 1180 UFSD("EXIT\n"); 1181 return 0; 1182 1183 dalloc_failed: 1184 iput(inode); 1185 failed: 1186 if (ubh) 1187 ubh_brelse_uspi (uspi); 1188 kfree (uspi); 1189 kfree(sbi); 1190 sb->s_fs_info = NULL; 1191 UFSD("EXIT (FAILED)\n"); 1192 return ret; 1193 1194 failed_nomem: 1195 UFSD("EXIT (NOMEM)\n"); 1196 return -ENOMEM; 1197 } 1198 1199 static int ufs_sync_fs(struct super_block *sb, int wait) 1200 { 1201 struct ufs_sb_private_info * uspi; 1202 struct ufs_super_block_first * usb1; 1203 struct ufs_super_block_third * usb3; 1204 unsigned flags; 1205 1206 lock_ufs(sb); 1207 lock_super(sb); 1208 1209 UFSD("ENTER\n"); 1210 1211 flags = UFS_SB(sb)->s_flags; 1212 uspi = UFS_SB(sb)->s_uspi; 1213 usb1 = ubh_get_usb_first(uspi); 1214 usb3 = ubh_get_usb_third(uspi); 1215 1216 usb1->fs_time = cpu_to_fs32(sb, get_seconds()); 1217 if ((flags & UFS_ST_MASK) == UFS_ST_SUN || 1218 (flags & UFS_ST_MASK) == UFS_ST_SUNOS || 1219 (flags & UFS_ST_MASK) == UFS_ST_SUNx86) 1220 ufs_set_fs_state(sb, usb1, usb3, 1221 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time)); 1222 ufs_put_cstotal(sb); 1223 sb->s_dirt = 0; 1224 1225 UFSD("EXIT\n"); 1226 unlock_super(sb); 1227 unlock_ufs(sb); 1228 1229 return 0; 1230 } 1231 1232 static void ufs_write_super(struct super_block *sb) 1233 { 1234 if (!(sb->s_flags & MS_RDONLY)) 1235 ufs_sync_fs(sb, 1); 1236 else 1237 sb->s_dirt = 0; 1238 } 1239 1240 static void ufs_put_super(struct super_block *sb) 1241 { 1242 struct ufs_sb_info * sbi = UFS_SB(sb); 1243 1244 UFSD("ENTER\n"); 1245 1246 if (sb->s_dirt) 1247 ufs_write_super(sb); 1248 1249 if (!(sb->s_flags & MS_RDONLY)) 1250 ufs_put_super_internal(sb); 1251 1252 ubh_brelse_uspi (sbi->s_uspi); 1253 kfree (sbi->s_uspi); 1254 kfree (sbi); 1255 sb->s_fs_info = NULL; 1256 UFSD("EXIT\n"); 1257 return; 1258 } 1259 1260 1261 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data) 1262 { 1263 struct ufs_sb_private_info * uspi; 1264 struct ufs_super_block_first * usb1; 1265 struct ufs_super_block_third * usb3; 1266 unsigned new_mount_opt, ufstype; 1267 unsigned flags; 1268 1269 lock_ufs(sb); 1270 lock_super(sb); 1271 uspi = UFS_SB(sb)->s_uspi; 1272 flags = UFS_SB(sb)->s_flags; 1273 usb1 = ubh_get_usb_first(uspi); 1274 usb3 = ubh_get_usb_third(uspi); 1275 1276 /* 1277 * Allow the "check" option to be passed as a remount option. 1278 * It is not possible to change ufstype option during remount 1279 */ 1280 ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE; 1281 new_mount_opt = 0; 1282 ufs_set_opt (new_mount_opt, ONERROR_LOCK); 1283 if (!ufs_parse_options (data, &new_mount_opt)) { 1284 unlock_super(sb); 1285 unlock_ufs(sb); 1286 return -EINVAL; 1287 } 1288 if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) { 1289 new_mount_opt |= ufstype; 1290 } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) { 1291 printk("ufstype can't be changed during remount\n"); 1292 unlock_super(sb); 1293 unlock_ufs(sb); 1294 return -EINVAL; 1295 } 1296 1297 if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) { 1298 UFS_SB(sb)->s_mount_opt = new_mount_opt; 1299 unlock_super(sb); 1300 unlock_ufs(sb); 1301 return 0; 1302 } 1303 1304 /* 1305 * fs was mouted as rw, remounting ro 1306 */ 1307 if (*mount_flags & MS_RDONLY) { 1308 ufs_put_super_internal(sb); 1309 usb1->fs_time = cpu_to_fs32(sb, get_seconds()); 1310 if ((flags & UFS_ST_MASK) == UFS_ST_SUN 1311 || (flags & UFS_ST_MASK) == UFS_ST_SUNOS 1312 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86) 1313 ufs_set_fs_state(sb, usb1, usb3, 1314 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time)); 1315 ubh_mark_buffer_dirty (USPI_UBH(uspi)); 1316 sb->s_dirt = 0; 1317 sb->s_flags |= MS_RDONLY; 1318 } else { 1319 /* 1320 * fs was mounted as ro, remounting rw 1321 */ 1322 #ifndef CONFIG_UFS_FS_WRITE 1323 printk("ufs was compiled with read-only support, " 1324 "can't be mounted as read-write\n"); 1325 unlock_super(sb); 1326 unlock_ufs(sb); 1327 return -EINVAL; 1328 #else 1329 if (ufstype != UFS_MOUNT_UFSTYPE_SUN && 1330 ufstype != UFS_MOUNT_UFSTYPE_SUNOS && 1331 ufstype != UFS_MOUNT_UFSTYPE_44BSD && 1332 ufstype != UFS_MOUNT_UFSTYPE_SUNx86 && 1333 ufstype != UFS_MOUNT_UFSTYPE_UFS2) { 1334 printk("this ufstype is read-only supported\n"); 1335 unlock_super(sb); 1336 unlock_ufs(sb); 1337 return -EINVAL; 1338 } 1339 if (!ufs_read_cylinder_structures(sb)) { 1340 printk("failed during remounting\n"); 1341 unlock_super(sb); 1342 unlock_ufs(sb); 1343 return -EPERM; 1344 } 1345 sb->s_flags &= ~MS_RDONLY; 1346 #endif 1347 } 1348 UFS_SB(sb)->s_mount_opt = new_mount_opt; 1349 unlock_super(sb); 1350 unlock_ufs(sb); 1351 return 0; 1352 } 1353 1354 static int ufs_show_options(struct seq_file *seq, struct vfsmount *vfs) 1355 { 1356 struct ufs_sb_info *sbi = UFS_SB(vfs->mnt_sb); 1357 unsigned mval = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE; 1358 const struct match_token *tp = tokens; 1359 1360 while (tp->token != Opt_onerror_panic && tp->token != mval) 1361 ++tp; 1362 BUG_ON(tp->token == Opt_onerror_panic); 1363 seq_printf(seq, ",%s", tp->pattern); 1364 1365 mval = sbi->s_mount_opt & UFS_MOUNT_ONERROR; 1366 while (tp->token != Opt_err && tp->token != mval) 1367 ++tp; 1368 BUG_ON(tp->token == Opt_err); 1369 seq_printf(seq, ",%s", tp->pattern); 1370 1371 return 0; 1372 } 1373 1374 static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf) 1375 { 1376 struct super_block *sb = dentry->d_sb; 1377 struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi; 1378 unsigned flags = UFS_SB(sb)->s_flags; 1379 struct ufs_super_block_first *usb1; 1380 struct ufs_super_block_second *usb2; 1381 struct ufs_super_block_third *usb3; 1382 u64 id = huge_encode_dev(sb->s_bdev->bd_dev); 1383 1384 lock_ufs(sb); 1385 1386 usb1 = ubh_get_usb_first(uspi); 1387 usb2 = ubh_get_usb_second(uspi); 1388 usb3 = ubh_get_usb_third(uspi); 1389 1390 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { 1391 buf->f_type = UFS2_MAGIC; 1392 buf->f_blocks = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize); 1393 } else { 1394 buf->f_type = UFS_MAGIC; 1395 buf->f_blocks = uspi->s_dsize; 1396 } 1397 buf->f_bfree = ufs_blkstofrags(uspi->cs_total.cs_nbfree) + 1398 uspi->cs_total.cs_nffree; 1399 buf->f_ffree = uspi->cs_total.cs_nifree; 1400 buf->f_bsize = sb->s_blocksize; 1401 buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree)) 1402 ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0; 1403 buf->f_files = uspi->s_ncg * uspi->s_ipg; 1404 buf->f_namelen = UFS_MAXNAMLEN; 1405 buf->f_fsid.val[0] = (u32)id; 1406 buf->f_fsid.val[1] = (u32)(id >> 32); 1407 1408 unlock_ufs(sb); 1409 1410 return 0; 1411 } 1412 1413 static struct kmem_cache * ufs_inode_cachep; 1414 1415 static struct inode *ufs_alloc_inode(struct super_block *sb) 1416 { 1417 struct ufs_inode_info *ei; 1418 ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, GFP_NOFS); 1419 if (!ei) 1420 return NULL; 1421 ei->vfs_inode.i_version = 1; 1422 return &ei->vfs_inode; 1423 } 1424 1425 static void ufs_i_callback(struct rcu_head *head) 1426 { 1427 struct inode *inode = container_of(head, struct inode, i_rcu); 1428 INIT_LIST_HEAD(&inode->i_dentry); 1429 kmem_cache_free(ufs_inode_cachep, UFS_I(inode)); 1430 } 1431 1432 static void ufs_destroy_inode(struct inode *inode) 1433 { 1434 call_rcu(&inode->i_rcu, ufs_i_callback); 1435 } 1436 1437 static void init_once(void *foo) 1438 { 1439 struct ufs_inode_info *ei = (struct ufs_inode_info *) foo; 1440 1441 inode_init_once(&ei->vfs_inode); 1442 } 1443 1444 static int init_inodecache(void) 1445 { 1446 ufs_inode_cachep = kmem_cache_create("ufs_inode_cache", 1447 sizeof(struct ufs_inode_info), 1448 0, (SLAB_RECLAIM_ACCOUNT| 1449 SLAB_MEM_SPREAD), 1450 init_once); 1451 if (ufs_inode_cachep == NULL) 1452 return -ENOMEM; 1453 return 0; 1454 } 1455 1456 static void destroy_inodecache(void) 1457 { 1458 kmem_cache_destroy(ufs_inode_cachep); 1459 } 1460 1461 static const struct super_operations ufs_super_ops = { 1462 .alloc_inode = ufs_alloc_inode, 1463 .destroy_inode = ufs_destroy_inode, 1464 .write_inode = ufs_write_inode, 1465 .evict_inode = ufs_evict_inode, 1466 .put_super = ufs_put_super, 1467 .write_super = ufs_write_super, 1468 .sync_fs = ufs_sync_fs, 1469 .statfs = ufs_statfs, 1470 .remount_fs = ufs_remount, 1471 .show_options = ufs_show_options, 1472 }; 1473 1474 static struct dentry *ufs_mount(struct file_system_type *fs_type, 1475 int flags, const char *dev_name, void *data) 1476 { 1477 return mount_bdev(fs_type, flags, dev_name, data, ufs_fill_super); 1478 } 1479 1480 static struct file_system_type ufs_fs_type = { 1481 .owner = THIS_MODULE, 1482 .name = "ufs", 1483 .mount = ufs_mount, 1484 .kill_sb = kill_block_super, 1485 .fs_flags = FS_REQUIRES_DEV, 1486 }; 1487 1488 static int __init init_ufs_fs(void) 1489 { 1490 int err = init_inodecache(); 1491 if (err) 1492 goto out1; 1493 err = register_filesystem(&ufs_fs_type); 1494 if (err) 1495 goto out; 1496 return 0; 1497 out: 1498 destroy_inodecache(); 1499 out1: 1500 return err; 1501 } 1502 1503 static void __exit exit_ufs_fs(void) 1504 { 1505 unregister_filesystem(&ufs_fs_type); 1506 destroy_inodecache(); 1507 } 1508 1509 module_init(init_ufs_fs) 1510 module_exit(exit_ufs_fs) 1511 MODULE_LICENSE("GPL"); 1512