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