1 /* 2 * linux/fs/ufs/super.c 3 * 4 * Copyright (C) 1998 5 * Daniel Pirkl <daniel.pirkl@email.cz> 6 * Charles University, Faculty of Mathematics and Physics 7 */ 8 9 /* Derived from 10 * 11 * linux/fs/ext2/super.c 12 * 13 * Copyright (C) 1992, 1993, 1994, 1995 14 * Remy Card (card@masi.ibp.fr) 15 * Laboratoire MASI - Institut Blaise Pascal 16 * Universite Pierre et Marie Curie (Paris VI) 17 * 18 * from 19 * 20 * linux/fs/minix/inode.c 21 * 22 * Copyright (C) 1991, 1992 Linus Torvalds 23 * 24 * Big-endian to little-endian byte-swapping/bitmaps by 25 * David S. Miller (davem@caip.rutgers.edu), 1995 26 */ 27 28 /* 29 * Inspired by 30 * 31 * linux/fs/ufs/super.c 32 * 33 * Copyright (C) 1996 34 * Adrian Rodriguez (adrian@franklins-tower.rutgers.edu) 35 * Laboratory for Computer Science Research Computing Facility 36 * Rutgers, The State University of New Jersey 37 * 38 * Copyright (C) 1996 Eddie C. Dost (ecd@skynet.be) 39 * 40 * Kernel module support added on 96/04/26 by 41 * Stefan Reinauer <stepan@home.culture.mipt.ru> 42 * 43 * Module usage counts added on 96/04/29 by 44 * Gertjan van Wingerde <gwingerde@gmail.com> 45 * 46 * Clean swab support on 19970406 by 47 * Francois-Rene Rideau <fare@tunes.org> 48 * 49 * 4.4BSD (FreeBSD) support added on February 1st 1998 by 50 * Niels Kristian Bech Jensen <nkbj@image.dk> partially based 51 * on code by Martin von Loewis <martin@mira.isdn.cs.tu-berlin.de>. 52 * 53 * NeXTstep support added on February 5th 1998 by 54 * Niels Kristian Bech Jensen <nkbj@image.dk>. 55 * 56 * write support Daniel Pirkl <daniel.pirkl@email.cz> 1998 57 * 58 * HP/UX hfs filesystem support added by 59 * Martin K. Petersen <mkp@mkp.net>, August 1999 60 * 61 * UFS2 (of FreeBSD 5.x) support added by 62 * Niraj Kumar <niraj17@iitbombay.org>, Jan 2004 63 * 64 * UFS2 write support added by 65 * Evgeniy Dushistov <dushistov@mail.ru>, 2007 66 */ 67 68 69 #include <linux/exportfs.h> 70 #include <linux/module.h> 71 #include <linux/bitops.h> 72 73 #include <stdarg.h> 74 75 #include <asm/uaccess.h> 76 77 #include <linux/errno.h> 78 #include <linux/fs.h> 79 #include <linux/slab.h> 80 #include <linux/time.h> 81 #include <linux/stat.h> 82 #include <linux/string.h> 83 #include <linux/blkdev.h> 84 #include <linux/init.h> 85 #include <linux/parser.h> 86 #include <linux/buffer_head.h> 87 #include <linux/vfs.h> 88 #include <linux/log2.h> 89 #include <linux/mount.h> 90 #include <linux/seq_file.h> 91 92 #include "ufs_fs.h" 93 #include "ufs.h" 94 #include "swab.h" 95 #include "util.h" 96 97 void lock_ufs(struct super_block *sb) 98 { 99 #if defined(CONFIG_SMP) || defined (CONFIG_PREEMPT) 100 struct ufs_sb_info *sbi = UFS_SB(sb); 101 102 mutex_lock(&sbi->mutex); 103 sbi->mutex_owner = current; 104 #endif 105 } 106 107 void unlock_ufs(struct super_block *sb) 108 { 109 #if defined(CONFIG_SMP) || defined (CONFIG_PREEMPT) 110 struct ufs_sb_info *sbi = UFS_SB(sb); 111 112 sbi->mutex_owner = NULL; 113 mutex_unlock(&sbi->mutex); 114 #endif 115 } 116 117 static struct inode *ufs_nfs_get_inode(struct super_block *sb, u64 ino, u32 generation) 118 { 119 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 120 struct inode *inode; 121 122 if (ino < UFS_ROOTINO || ino > uspi->s_ncg * uspi->s_ipg) 123 return ERR_PTR(-ESTALE); 124 125 inode = ufs_iget(sb, ino); 126 if (IS_ERR(inode)) 127 return ERR_CAST(inode); 128 if (generation && inode->i_generation != generation) { 129 iput(inode); 130 return ERR_PTR(-ESTALE); 131 } 132 return inode; 133 } 134 135 static struct dentry *ufs_fh_to_dentry(struct super_block *sb, struct fid *fid, 136 int fh_len, int fh_type) 137 { 138 return generic_fh_to_dentry(sb, fid, fh_len, fh_type, ufs_nfs_get_inode); 139 } 140 141 static struct dentry *ufs_fh_to_parent(struct super_block *sb, struct fid *fid, 142 int fh_len, int fh_type) 143 { 144 return generic_fh_to_parent(sb, fid, fh_len, fh_type, ufs_nfs_get_inode); 145 } 146 147 static struct dentry *ufs_get_parent(struct dentry *child) 148 { 149 struct qstr dot_dot = QSTR_INIT("..", 2); 150 ino_t ino; 151 152 ino = ufs_inode_by_name(child->d_inode, &dot_dot); 153 if (!ino) 154 return ERR_PTR(-ENOENT); 155 return d_obtain_alias(ufs_iget(child->d_inode->i_sb, ino)); 156 } 157 158 static const struct export_operations ufs_export_ops = { 159 .fh_to_dentry = ufs_fh_to_dentry, 160 .fh_to_parent = ufs_fh_to_parent, 161 .get_parent = ufs_get_parent, 162 }; 163 164 #ifdef CONFIG_UFS_DEBUG 165 /* 166 * Print contents of ufs_super_block, useful for debugging 167 */ 168 static void ufs_print_super_stuff(struct super_block *sb, 169 struct ufs_super_block_first *usb1, 170 struct ufs_super_block_second *usb2, 171 struct ufs_super_block_third *usb3) 172 { 173 u32 magic = fs32_to_cpu(sb, usb3->fs_magic); 174 175 printk("ufs_print_super_stuff\n"); 176 printk(" magic: 0x%x\n", magic); 177 if (fs32_to_cpu(sb, usb3->fs_magic) == UFS2_MAGIC) { 178 printk(" fs_size: %llu\n", (unsigned long long) 179 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size)); 180 printk(" fs_dsize: %llu\n", (unsigned long long) 181 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize)); 182 printk(" bsize: %u\n", 183 fs32_to_cpu(sb, usb1->fs_bsize)); 184 printk(" fsize: %u\n", 185 fs32_to_cpu(sb, usb1->fs_fsize)); 186 printk(" fs_volname: %s\n", usb2->fs_un.fs_u2.fs_volname); 187 printk(" fs_sblockloc: %llu\n", (unsigned long long) 188 fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc)); 189 printk(" cs_ndir(No of dirs): %llu\n", (unsigned long long) 190 fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir)); 191 printk(" cs_nbfree(No of free blocks): %llu\n", 192 (unsigned long long) 193 fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree)); 194 printk(KERN_INFO" cs_nifree(Num of free inodes): %llu\n", 195 (unsigned long long) 196 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree)); 197 printk(KERN_INFO" cs_nffree(Num of free frags): %llu\n", 198 (unsigned long long) 199 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree)); 200 printk(KERN_INFO" fs_maxsymlinklen: %u\n", 201 fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen)); 202 } else { 203 printk(" sblkno: %u\n", fs32_to_cpu(sb, usb1->fs_sblkno)); 204 printk(" cblkno: %u\n", fs32_to_cpu(sb, usb1->fs_cblkno)); 205 printk(" iblkno: %u\n", fs32_to_cpu(sb, usb1->fs_iblkno)); 206 printk(" dblkno: %u\n", fs32_to_cpu(sb, usb1->fs_dblkno)); 207 printk(" cgoffset: %u\n", 208 fs32_to_cpu(sb, usb1->fs_cgoffset)); 209 printk(" ~cgmask: 0x%x\n", 210 ~fs32_to_cpu(sb, usb1->fs_cgmask)); 211 printk(" size: %u\n", fs32_to_cpu(sb, usb1->fs_size)); 212 printk(" dsize: %u\n", fs32_to_cpu(sb, usb1->fs_dsize)); 213 printk(" ncg: %u\n", fs32_to_cpu(sb, usb1->fs_ncg)); 214 printk(" bsize: %u\n", fs32_to_cpu(sb, usb1->fs_bsize)); 215 printk(" fsize: %u\n", fs32_to_cpu(sb, usb1->fs_fsize)); 216 printk(" frag: %u\n", fs32_to_cpu(sb, usb1->fs_frag)); 217 printk(" fragshift: %u\n", 218 fs32_to_cpu(sb, usb1->fs_fragshift)); 219 printk(" ~fmask: %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask)); 220 printk(" fshift: %u\n", fs32_to_cpu(sb, usb1->fs_fshift)); 221 printk(" sbsize: %u\n", fs32_to_cpu(sb, usb1->fs_sbsize)); 222 printk(" spc: %u\n", fs32_to_cpu(sb, usb1->fs_spc)); 223 printk(" cpg: %u\n", fs32_to_cpu(sb, usb1->fs_cpg)); 224 printk(" ipg: %u\n", fs32_to_cpu(sb, usb1->fs_ipg)); 225 printk(" fpg: %u\n", fs32_to_cpu(sb, usb1->fs_fpg)); 226 printk(" csaddr: %u\n", fs32_to_cpu(sb, usb1->fs_csaddr)); 227 printk(" cssize: %u\n", fs32_to_cpu(sb, usb1->fs_cssize)); 228 printk(" cgsize: %u\n", fs32_to_cpu(sb, usb1->fs_cgsize)); 229 printk(" fstodb: %u\n", 230 fs32_to_cpu(sb, usb1->fs_fsbtodb)); 231 printk(" nrpos: %u\n", fs32_to_cpu(sb, usb3->fs_nrpos)); 232 printk(" ndir %u\n", 233 fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir)); 234 printk(" nifree %u\n", 235 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree)); 236 printk(" nbfree %u\n", 237 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree)); 238 printk(" nffree %u\n", 239 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree)); 240 } 241 printk("\n"); 242 } 243 244 /* 245 * Print contents of ufs_cylinder_group, useful for debugging 246 */ 247 static void ufs_print_cylinder_stuff(struct super_block *sb, 248 struct ufs_cylinder_group *cg) 249 { 250 printk("\nufs_print_cylinder_stuff\n"); 251 printk("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group)); 252 printk(" magic: %x\n", fs32_to_cpu(sb, cg->cg_magic)); 253 printk(" time: %u\n", fs32_to_cpu(sb, cg->cg_time)); 254 printk(" cgx: %u\n", fs32_to_cpu(sb, cg->cg_cgx)); 255 printk(" ncyl: %u\n", fs16_to_cpu(sb, cg->cg_ncyl)); 256 printk(" niblk: %u\n", fs16_to_cpu(sb, cg->cg_niblk)); 257 printk(" ndblk: %u\n", fs32_to_cpu(sb, cg->cg_ndblk)); 258 printk(" cs_ndir: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir)); 259 printk(" cs_nbfree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree)); 260 printk(" cs_nifree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree)); 261 printk(" cs_nffree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree)); 262 printk(" rotor: %u\n", fs32_to_cpu(sb, cg->cg_rotor)); 263 printk(" frotor: %u\n", fs32_to_cpu(sb, cg->cg_frotor)); 264 printk(" irotor: %u\n", fs32_to_cpu(sb, cg->cg_irotor)); 265 printk(" frsum: %u, %u, %u, %u, %u, %u, %u, %u\n", 266 fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]), 267 fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]), 268 fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]), 269 fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7])); 270 printk(" btotoff: %u\n", fs32_to_cpu(sb, cg->cg_btotoff)); 271 printk(" boff: %u\n", fs32_to_cpu(sb, cg->cg_boff)); 272 printk(" iuseoff: %u\n", fs32_to_cpu(sb, cg->cg_iusedoff)); 273 printk(" freeoff: %u\n", fs32_to_cpu(sb, cg->cg_freeoff)); 274 printk(" nextfreeoff: %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff)); 275 printk(" clustersumoff %u\n", 276 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff)); 277 printk(" clusteroff %u\n", 278 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff)); 279 printk(" nclusterblks %u\n", 280 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks)); 281 printk("\n"); 282 } 283 #else 284 # define ufs_print_super_stuff(sb, usb1, usb2, usb3) /**/ 285 # define ufs_print_cylinder_stuff(sb, cg) /**/ 286 #endif /* CONFIG_UFS_DEBUG */ 287 288 static const struct super_operations ufs_super_ops; 289 290 static char error_buf[1024]; 291 292 void ufs_error (struct super_block * sb, const char * function, 293 const char * fmt, ...) 294 { 295 struct ufs_sb_private_info * uspi; 296 struct ufs_super_block_first * usb1; 297 va_list args; 298 299 uspi = UFS_SB(sb)->s_uspi; 300 usb1 = ubh_get_usb_first(uspi); 301 302 if (!(sb->s_flags & MS_RDONLY)) { 303 usb1->fs_clean = UFS_FSBAD; 304 ubh_mark_buffer_dirty(USPI_UBH(uspi)); 305 sb->s_dirt = 1; 306 sb->s_flags |= MS_RDONLY; 307 } 308 va_start (args, fmt); 309 vsnprintf (error_buf, sizeof(error_buf), fmt, args); 310 va_end (args); 311 switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) { 312 case UFS_MOUNT_ONERROR_PANIC: 313 panic ("UFS-fs panic (device %s): %s: %s\n", 314 sb->s_id, function, error_buf); 315 316 case UFS_MOUNT_ONERROR_LOCK: 317 case UFS_MOUNT_ONERROR_UMOUNT: 318 case UFS_MOUNT_ONERROR_REPAIR: 319 printk (KERN_CRIT "UFS-fs error (device %s): %s: %s\n", 320 sb->s_id, function, error_buf); 321 } 322 } 323 324 void ufs_panic (struct super_block * sb, const char * function, 325 const char * fmt, ...) 326 { 327 struct ufs_sb_private_info * uspi; 328 struct ufs_super_block_first * usb1; 329 va_list args; 330 331 uspi = UFS_SB(sb)->s_uspi; 332 usb1 = ubh_get_usb_first(uspi); 333 334 if (!(sb->s_flags & MS_RDONLY)) { 335 usb1->fs_clean = UFS_FSBAD; 336 ubh_mark_buffer_dirty(USPI_UBH(uspi)); 337 sb->s_dirt = 1; 338 } 339 va_start (args, fmt); 340 vsnprintf (error_buf, sizeof(error_buf), fmt, args); 341 va_end (args); 342 sb->s_flags |= MS_RDONLY; 343 printk (KERN_CRIT "UFS-fs panic (device %s): %s: %s\n", 344 sb->s_id, function, error_buf); 345 } 346 347 void ufs_warning (struct super_block * sb, const char * function, 348 const char * fmt, ...) 349 { 350 va_list args; 351 352 va_start (args, fmt); 353 vsnprintf (error_buf, sizeof(error_buf), fmt, args); 354 va_end (args); 355 printk (KERN_WARNING "UFS-fs warning (device %s): %s: %s\n", 356 sb->s_id, function, error_buf); 357 } 358 359 enum { 360 Opt_type_old = UFS_MOUNT_UFSTYPE_OLD, 361 Opt_type_sunx86 = UFS_MOUNT_UFSTYPE_SUNx86, 362 Opt_type_sun = UFS_MOUNT_UFSTYPE_SUN, 363 Opt_type_sunos = UFS_MOUNT_UFSTYPE_SUNOS, 364 Opt_type_44bsd = UFS_MOUNT_UFSTYPE_44BSD, 365 Opt_type_ufs2 = UFS_MOUNT_UFSTYPE_UFS2, 366 Opt_type_hp = UFS_MOUNT_UFSTYPE_HP, 367 Opt_type_nextstepcd = UFS_MOUNT_UFSTYPE_NEXTSTEP_CD, 368 Opt_type_nextstep = UFS_MOUNT_UFSTYPE_NEXTSTEP, 369 Opt_type_openstep = UFS_MOUNT_UFSTYPE_OPENSTEP, 370 Opt_onerror_panic = UFS_MOUNT_ONERROR_PANIC, 371 Opt_onerror_lock = UFS_MOUNT_ONERROR_LOCK, 372 Opt_onerror_umount = UFS_MOUNT_ONERROR_UMOUNT, 373 Opt_onerror_repair = UFS_MOUNT_ONERROR_REPAIR, 374 Opt_err 375 }; 376 377 static const match_table_t tokens = { 378 {Opt_type_old, "ufstype=old"}, 379 {Opt_type_sunx86, "ufstype=sunx86"}, 380 {Opt_type_sun, "ufstype=sun"}, 381 {Opt_type_sunos, "ufstype=sunos"}, 382 {Opt_type_44bsd, "ufstype=44bsd"}, 383 {Opt_type_ufs2, "ufstype=ufs2"}, 384 {Opt_type_ufs2, "ufstype=5xbsd"}, 385 {Opt_type_hp, "ufstype=hp"}, 386 {Opt_type_nextstepcd, "ufstype=nextstep-cd"}, 387 {Opt_type_nextstep, "ufstype=nextstep"}, 388 {Opt_type_openstep, "ufstype=openstep"}, 389 /*end of possible ufs types */ 390 {Opt_onerror_panic, "onerror=panic"}, 391 {Opt_onerror_lock, "onerror=lock"}, 392 {Opt_onerror_umount, "onerror=umount"}, 393 {Opt_onerror_repair, "onerror=repair"}, 394 {Opt_err, NULL} 395 }; 396 397 static int ufs_parse_options (char * options, unsigned * mount_options) 398 { 399 char * p; 400 401 UFSD("ENTER\n"); 402 403 if (!options) 404 return 1; 405 406 while ((p = strsep(&options, ",")) != NULL) { 407 substring_t args[MAX_OPT_ARGS]; 408 int token; 409 if (!*p) 410 continue; 411 412 token = match_token(p, tokens, args); 413 switch (token) { 414 case Opt_type_old: 415 ufs_clear_opt (*mount_options, UFSTYPE); 416 ufs_set_opt (*mount_options, UFSTYPE_OLD); 417 break; 418 case Opt_type_sunx86: 419 ufs_clear_opt (*mount_options, UFSTYPE); 420 ufs_set_opt (*mount_options, UFSTYPE_SUNx86); 421 break; 422 case Opt_type_sun: 423 ufs_clear_opt (*mount_options, UFSTYPE); 424 ufs_set_opt (*mount_options, UFSTYPE_SUN); 425 break; 426 case Opt_type_sunos: 427 ufs_clear_opt(*mount_options, UFSTYPE); 428 ufs_set_opt(*mount_options, UFSTYPE_SUNOS); 429 break; 430 case Opt_type_44bsd: 431 ufs_clear_opt (*mount_options, UFSTYPE); 432 ufs_set_opt (*mount_options, UFSTYPE_44BSD); 433 break; 434 case Opt_type_ufs2: 435 ufs_clear_opt(*mount_options, UFSTYPE); 436 ufs_set_opt(*mount_options, UFSTYPE_UFS2); 437 break; 438 case Opt_type_hp: 439 ufs_clear_opt (*mount_options, UFSTYPE); 440 ufs_set_opt (*mount_options, UFSTYPE_HP); 441 break; 442 case Opt_type_nextstepcd: 443 ufs_clear_opt (*mount_options, UFSTYPE); 444 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD); 445 break; 446 case Opt_type_nextstep: 447 ufs_clear_opt (*mount_options, UFSTYPE); 448 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP); 449 break; 450 case Opt_type_openstep: 451 ufs_clear_opt (*mount_options, UFSTYPE); 452 ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP); 453 break; 454 case Opt_onerror_panic: 455 ufs_clear_opt (*mount_options, ONERROR); 456 ufs_set_opt (*mount_options, ONERROR_PANIC); 457 break; 458 case Opt_onerror_lock: 459 ufs_clear_opt (*mount_options, ONERROR); 460 ufs_set_opt (*mount_options, ONERROR_LOCK); 461 break; 462 case Opt_onerror_umount: 463 ufs_clear_opt (*mount_options, ONERROR); 464 ufs_set_opt (*mount_options, ONERROR_UMOUNT); 465 break; 466 case Opt_onerror_repair: 467 printk("UFS-fs: Unable to do repair on error, " 468 "will lock lock instead\n"); 469 ufs_clear_opt (*mount_options, ONERROR); 470 ufs_set_opt (*mount_options, ONERROR_REPAIR); 471 break; 472 default: 473 printk("UFS-fs: Invalid option: \"%s\" " 474 "or missing value\n", p); 475 return 0; 476 } 477 } 478 return 1; 479 } 480 481 /* 482 * Different types of UFS hold fs_cstotal in different 483 * places, and use different data structure for it. 484 * To make things simpler we just copy fs_cstotal to ufs_sb_private_info 485 */ 486 static void ufs_setup_cstotal(struct super_block *sb) 487 { 488 struct ufs_sb_info *sbi = UFS_SB(sb); 489 struct ufs_sb_private_info *uspi = sbi->s_uspi; 490 struct ufs_super_block_first *usb1; 491 struct ufs_super_block_second *usb2; 492 struct ufs_super_block_third *usb3; 493 unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE; 494 495 UFSD("ENTER, mtype=%u\n", mtype); 496 usb1 = ubh_get_usb_first(uspi); 497 usb2 = ubh_get_usb_second(uspi); 498 usb3 = ubh_get_usb_third(uspi); 499 500 if ((mtype == UFS_MOUNT_UFSTYPE_44BSD && 501 (usb1->fs_flags & UFS_FLAGS_UPDATED)) || 502 mtype == UFS_MOUNT_UFSTYPE_UFS2) { 503 /*we have statistic in different place, then usual*/ 504 uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir); 505 uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree); 506 uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree); 507 uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree); 508 } else { 509 uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir); 510 uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree); 511 uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree); 512 uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree); 513 } 514 UFSD("EXIT\n"); 515 } 516 517 /* 518 * Read on-disk structures associated with cylinder groups 519 */ 520 static int ufs_read_cylinder_structures(struct super_block *sb) 521 { 522 struct ufs_sb_info *sbi = UFS_SB(sb); 523 struct ufs_sb_private_info *uspi = sbi->s_uspi; 524 struct ufs_buffer_head * ubh; 525 unsigned char * base, * space; 526 unsigned size, blks, i; 527 struct ufs_super_block_third *usb3; 528 529 UFSD("ENTER\n"); 530 531 usb3 = ubh_get_usb_third(uspi); 532 /* 533 * Read cs structures from (usually) first data block 534 * on the device. 535 */ 536 size = uspi->s_cssize; 537 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift; 538 base = space = kmalloc(size, GFP_NOFS); 539 if (!base) 540 goto failed; 541 sbi->s_csp = (struct ufs_csum *)space; 542 for (i = 0; i < blks; i += uspi->s_fpb) { 543 size = uspi->s_bsize; 544 if (i + uspi->s_fpb > blks) 545 size = (blks - i) * uspi->s_fsize; 546 547 ubh = ubh_bread(sb, uspi->s_csaddr + i, size); 548 549 if (!ubh) 550 goto failed; 551 552 ubh_ubhcpymem (space, ubh, size); 553 554 space += size; 555 ubh_brelse (ubh); 556 ubh = NULL; 557 } 558 559 /* 560 * Read cylinder group (we read only first fragment from block 561 * at this time) and prepare internal data structures for cg caching. 562 */ 563 if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_NOFS))) 564 goto failed; 565 for (i = 0; i < uspi->s_ncg; i++) 566 sbi->s_ucg[i] = NULL; 567 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) { 568 sbi->s_ucpi[i] = NULL; 569 sbi->s_cgno[i] = UFS_CGNO_EMPTY; 570 } 571 for (i = 0; i < uspi->s_ncg; i++) { 572 UFSD("read cg %u\n", i); 573 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i)))) 574 goto failed; 575 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data)) 576 goto failed; 577 578 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data); 579 } 580 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) { 581 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_NOFS))) 582 goto failed; 583 sbi->s_cgno[i] = UFS_CGNO_EMPTY; 584 } 585 sbi->s_cg_loaded = 0; 586 UFSD("EXIT\n"); 587 return 1; 588 589 failed: 590 kfree (base); 591 if (sbi->s_ucg) { 592 for (i = 0; i < uspi->s_ncg; i++) 593 if (sbi->s_ucg[i]) 594 brelse (sbi->s_ucg[i]); 595 kfree (sbi->s_ucg); 596 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) 597 kfree (sbi->s_ucpi[i]); 598 } 599 UFSD("EXIT (FAILED)\n"); 600 return 0; 601 } 602 603 /* 604 * Sync our internal copy of fs_cstotal with disk 605 */ 606 static void ufs_put_cstotal(struct super_block *sb) 607 { 608 unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE; 609 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 610 struct ufs_super_block_first *usb1; 611 struct ufs_super_block_second *usb2; 612 struct ufs_super_block_third *usb3; 613 614 UFSD("ENTER\n"); 615 usb1 = ubh_get_usb_first(uspi); 616 usb2 = ubh_get_usb_second(uspi); 617 usb3 = ubh_get_usb_third(uspi); 618 619 if ((mtype == UFS_MOUNT_UFSTYPE_44BSD && 620 (usb1->fs_flags & UFS_FLAGS_UPDATED)) || 621 mtype == UFS_MOUNT_UFSTYPE_UFS2) { 622 /*we have statistic in different place, then usual*/ 623 usb2->fs_un.fs_u2.cs_ndir = 624 cpu_to_fs64(sb, uspi->cs_total.cs_ndir); 625 usb2->fs_un.fs_u2.cs_nbfree = 626 cpu_to_fs64(sb, uspi->cs_total.cs_nbfree); 627 usb3->fs_un1.fs_u2.cs_nifree = 628 cpu_to_fs64(sb, uspi->cs_total.cs_nifree); 629 usb3->fs_un1.fs_u2.cs_nffree = 630 cpu_to_fs64(sb, uspi->cs_total.cs_nffree); 631 } else { 632 usb1->fs_cstotal.cs_ndir = 633 cpu_to_fs32(sb, uspi->cs_total.cs_ndir); 634 usb1->fs_cstotal.cs_nbfree = 635 cpu_to_fs32(sb, uspi->cs_total.cs_nbfree); 636 usb1->fs_cstotal.cs_nifree = 637 cpu_to_fs32(sb, uspi->cs_total.cs_nifree); 638 usb1->fs_cstotal.cs_nffree = 639 cpu_to_fs32(sb, uspi->cs_total.cs_nffree); 640 } 641 ubh_mark_buffer_dirty(USPI_UBH(uspi)); 642 ufs_print_super_stuff(sb, usb1, usb2, usb3); 643 UFSD("EXIT\n"); 644 } 645 646 /** 647 * ufs_put_super_internal() - put on-disk intrenal structures 648 * @sb: pointer to super_block structure 649 * Put on-disk structures associated with cylinder groups 650 * and write them back to disk, also update cs_total on disk 651 */ 652 static void ufs_put_super_internal(struct super_block *sb) 653 { 654 struct ufs_sb_info *sbi = UFS_SB(sb); 655 struct ufs_sb_private_info *uspi = sbi->s_uspi; 656 struct ufs_buffer_head * ubh; 657 unsigned char * base, * space; 658 unsigned blks, size, i; 659 660 661 UFSD("ENTER\n"); 662 663 ufs_put_cstotal(sb); 664 size = uspi->s_cssize; 665 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift; 666 base = space = (char*) sbi->s_csp; 667 for (i = 0; i < blks; i += uspi->s_fpb) { 668 size = uspi->s_bsize; 669 if (i + uspi->s_fpb > blks) 670 size = (blks - i) * uspi->s_fsize; 671 672 ubh = ubh_bread(sb, uspi->s_csaddr + i, size); 673 674 ubh_memcpyubh (ubh, space, size); 675 space += size; 676 ubh_mark_buffer_uptodate (ubh, 1); 677 ubh_mark_buffer_dirty (ubh); 678 ubh_brelse (ubh); 679 } 680 for (i = 0; i < sbi->s_cg_loaded; i++) { 681 ufs_put_cylinder (sb, i); 682 kfree (sbi->s_ucpi[i]); 683 } 684 for (; i < UFS_MAX_GROUP_LOADED; i++) 685 kfree (sbi->s_ucpi[i]); 686 for (i = 0; i < uspi->s_ncg; i++) 687 brelse (sbi->s_ucg[i]); 688 kfree (sbi->s_ucg); 689 kfree (base); 690 691 UFSD("EXIT\n"); 692 } 693 694 static int ufs_fill_super(struct super_block *sb, void *data, int silent) 695 { 696 struct ufs_sb_info * sbi; 697 struct ufs_sb_private_info * uspi; 698 struct ufs_super_block_first * usb1; 699 struct ufs_super_block_second * usb2; 700 struct ufs_super_block_third * usb3; 701 struct ufs_buffer_head * ubh; 702 struct inode *inode; 703 unsigned block_size, super_block_size; 704 unsigned flags; 705 unsigned super_block_offset; 706 unsigned maxsymlen; 707 int ret = -EINVAL; 708 709 uspi = NULL; 710 ubh = NULL; 711 flags = 0; 712 713 UFSD("ENTER\n"); 714 715 sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL); 716 if (!sbi) 717 goto failed_nomem; 718 sb->s_fs_info = sbi; 719 720 UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY)); 721 722 #ifndef CONFIG_UFS_FS_WRITE 723 if (!(sb->s_flags & MS_RDONLY)) { 724 printk("ufs was compiled with read-only support, " 725 "can't be mounted as read-write\n"); 726 goto failed; 727 } 728 #endif 729 mutex_init(&sbi->mutex); 730 /* 731 * Set default mount options 732 * Parse mount options 733 */ 734 sbi->s_mount_opt = 0; 735 ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK); 736 if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) { 737 printk("wrong mount options\n"); 738 goto failed; 739 } 740 if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) { 741 if (!silent) 742 printk("You didn't specify the type of your ufs filesystem\n\n" 743 "mount -t ufs -o ufstype=" 744 "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n" 745 ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, " 746 "default is ufstype=old\n"); 747 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD); 748 } 749 750 uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL); 751 sbi->s_uspi = uspi; 752 if (!uspi) 753 goto failed; 754 uspi->s_dirblksize = UFS_SECTOR_SIZE; 755 super_block_offset=UFS_SBLOCK; 756 757 /* Keep 2Gig file limit. Some UFS variants need to override 758 this but as I don't know which I'll let those in the know loosen 759 the rules */ 760 switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) { 761 case UFS_MOUNT_UFSTYPE_44BSD: 762 UFSD("ufstype=44bsd\n"); 763 uspi->s_fsize = block_size = 512; 764 uspi->s_fmask = ~(512 - 1); 765 uspi->s_fshift = 9; 766 uspi->s_sbsize = super_block_size = 1536; 767 uspi->s_sbbase = 0; 768 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; 769 break; 770 case UFS_MOUNT_UFSTYPE_UFS2: 771 UFSD("ufstype=ufs2\n"); 772 super_block_offset=SBLOCK_UFS2; 773 uspi->s_fsize = block_size = 512; 774 uspi->s_fmask = ~(512 - 1); 775 uspi->s_fshift = 9; 776 uspi->s_sbsize = super_block_size = 1536; 777 uspi->s_sbbase = 0; 778 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; 779 break; 780 781 case UFS_MOUNT_UFSTYPE_SUN: 782 UFSD("ufstype=sun\n"); 783 uspi->s_fsize = block_size = 1024; 784 uspi->s_fmask = ~(1024 - 1); 785 uspi->s_fshift = 10; 786 uspi->s_sbsize = super_block_size = 2048; 787 uspi->s_sbbase = 0; 788 uspi->s_maxsymlinklen = 0; /* Not supported on disk */ 789 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN; 790 break; 791 792 case UFS_MOUNT_UFSTYPE_SUNOS: 793 UFSD(("ufstype=sunos\n")) 794 uspi->s_fsize = block_size = 1024; 795 uspi->s_fmask = ~(1024 - 1); 796 uspi->s_fshift = 10; 797 uspi->s_sbsize = 2048; 798 super_block_size = 2048; 799 uspi->s_sbbase = 0; 800 uspi->s_maxsymlinklen = 0; /* Not supported on disk */ 801 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_SUNOS | UFS_CG_SUN; 802 break; 803 804 case UFS_MOUNT_UFSTYPE_SUNx86: 805 UFSD("ufstype=sunx86\n"); 806 uspi->s_fsize = block_size = 1024; 807 uspi->s_fmask = ~(1024 - 1); 808 uspi->s_fshift = 10; 809 uspi->s_sbsize = super_block_size = 2048; 810 uspi->s_sbbase = 0; 811 uspi->s_maxsymlinklen = 0; /* Not supported on disk */ 812 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN; 813 break; 814 815 case UFS_MOUNT_UFSTYPE_OLD: 816 UFSD("ufstype=old\n"); 817 uspi->s_fsize = block_size = 1024; 818 uspi->s_fmask = ~(1024 - 1); 819 uspi->s_fshift = 10; 820 uspi->s_sbsize = super_block_size = 2048; 821 uspi->s_sbbase = 0; 822 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 823 if (!(sb->s_flags & MS_RDONLY)) { 824 if (!silent) 825 printk(KERN_INFO "ufstype=old is supported read-only\n"); 826 sb->s_flags |= MS_RDONLY; 827 } 828 break; 829 830 case UFS_MOUNT_UFSTYPE_NEXTSTEP: 831 UFSD("ufstype=nextstep\n"); 832 uspi->s_fsize = block_size = 1024; 833 uspi->s_fmask = ~(1024 - 1); 834 uspi->s_fshift = 10; 835 uspi->s_sbsize = super_block_size = 2048; 836 uspi->s_sbbase = 0; 837 uspi->s_dirblksize = 1024; 838 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 839 if (!(sb->s_flags & MS_RDONLY)) { 840 if (!silent) 841 printk(KERN_INFO "ufstype=nextstep is supported read-only\n"); 842 sb->s_flags |= MS_RDONLY; 843 } 844 break; 845 846 case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD: 847 UFSD("ufstype=nextstep-cd\n"); 848 uspi->s_fsize = block_size = 2048; 849 uspi->s_fmask = ~(2048 - 1); 850 uspi->s_fshift = 11; 851 uspi->s_sbsize = super_block_size = 2048; 852 uspi->s_sbbase = 0; 853 uspi->s_dirblksize = 1024; 854 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 855 if (!(sb->s_flags & MS_RDONLY)) { 856 if (!silent) 857 printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n"); 858 sb->s_flags |= MS_RDONLY; 859 } 860 break; 861 862 case UFS_MOUNT_UFSTYPE_OPENSTEP: 863 UFSD("ufstype=openstep\n"); 864 uspi->s_fsize = block_size = 1024; 865 uspi->s_fmask = ~(1024 - 1); 866 uspi->s_fshift = 10; 867 uspi->s_sbsize = super_block_size = 2048; 868 uspi->s_sbbase = 0; 869 uspi->s_dirblksize = 1024; 870 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; 871 if (!(sb->s_flags & MS_RDONLY)) { 872 if (!silent) 873 printk(KERN_INFO "ufstype=openstep is supported read-only\n"); 874 sb->s_flags |= MS_RDONLY; 875 } 876 break; 877 878 case UFS_MOUNT_UFSTYPE_HP: 879 UFSD("ufstype=hp\n"); 880 uspi->s_fsize = block_size = 1024; 881 uspi->s_fmask = ~(1024 - 1); 882 uspi->s_fshift = 10; 883 uspi->s_sbsize = super_block_size = 2048; 884 uspi->s_sbbase = 0; 885 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 886 if (!(sb->s_flags & MS_RDONLY)) { 887 if (!silent) 888 printk(KERN_INFO "ufstype=hp is supported read-only\n"); 889 sb->s_flags |= MS_RDONLY; 890 } 891 break; 892 default: 893 if (!silent) 894 printk("unknown ufstype\n"); 895 goto failed; 896 } 897 898 again: 899 if (!sb_set_blocksize(sb, block_size)) { 900 printk(KERN_ERR "UFS: failed to set blocksize\n"); 901 goto failed; 902 } 903 904 /* 905 * read ufs super block from device 906 */ 907 908 ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size); 909 910 if (!ubh) 911 goto failed; 912 913 usb1 = ubh_get_usb_first(uspi); 914 usb2 = ubh_get_usb_second(uspi); 915 usb3 = ubh_get_usb_third(uspi); 916 917 /* Sort out mod used on SunOS 4.1.3 for fs_state */ 918 uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat); 919 if (((flags & UFS_ST_MASK) == UFS_ST_SUNOS) && 920 (uspi->s_postblformat != UFS_42POSTBLFMT)) { 921 flags &= ~UFS_ST_MASK; 922 flags |= UFS_ST_SUN; 923 } 924 925 /* 926 * Check ufs magic number 927 */ 928 sbi->s_bytesex = BYTESEX_LE; 929 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) { 930 case UFS_MAGIC: 931 case UFS_MAGIC_BW: 932 case UFS2_MAGIC: 933 case UFS_MAGIC_LFN: 934 case UFS_MAGIC_FEA: 935 case UFS_MAGIC_4GB: 936 goto magic_found; 937 } 938 sbi->s_bytesex = BYTESEX_BE; 939 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) { 940 case UFS_MAGIC: 941 case UFS_MAGIC_BW: 942 case UFS2_MAGIC: 943 case UFS_MAGIC_LFN: 944 case UFS_MAGIC_FEA: 945 case UFS_MAGIC_4GB: 946 goto magic_found; 947 } 948 949 if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP) 950 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD) 951 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP)) 952 && uspi->s_sbbase < 256) { 953 ubh_brelse_uspi(uspi); 954 ubh = NULL; 955 uspi->s_sbbase += 8; 956 goto again; 957 } 958 if (!silent) 959 printk("ufs_read_super: bad magic number\n"); 960 goto failed; 961 962 magic_found: 963 /* 964 * Check block and fragment sizes 965 */ 966 uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize); 967 uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize); 968 uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize); 969 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask); 970 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift); 971 972 if (!is_power_of_2(uspi->s_fsize)) { 973 printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n", 974 uspi->s_fsize); 975 goto failed; 976 } 977 if (uspi->s_fsize < 512) { 978 printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n", 979 uspi->s_fsize); 980 goto failed; 981 } 982 if (uspi->s_fsize > 4096) { 983 printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n", 984 uspi->s_fsize); 985 goto failed; 986 } 987 if (!is_power_of_2(uspi->s_bsize)) { 988 printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n", 989 uspi->s_bsize); 990 goto failed; 991 } 992 if (uspi->s_bsize < 4096) { 993 printk(KERN_ERR "ufs_read_super: block size %u is too small\n", 994 uspi->s_bsize); 995 goto failed; 996 } 997 if (uspi->s_bsize / uspi->s_fsize > 8) { 998 printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n", 999 uspi->s_bsize / uspi->s_fsize); 1000 goto failed; 1001 } 1002 if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) { 1003 ubh_brelse_uspi(uspi); 1004 ubh = NULL; 1005 block_size = uspi->s_fsize; 1006 super_block_size = uspi->s_sbsize; 1007 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size); 1008 goto again; 1009 } 1010 1011 sbi->s_flags = flags;/*after that line some functions use s_flags*/ 1012 ufs_print_super_stuff(sb, usb1, usb2, usb3); 1013 1014 /* 1015 * Check, if file system was correctly unmounted. 1016 * If not, make it read only. 1017 */ 1018 if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) || 1019 ((flags & UFS_ST_MASK) == UFS_ST_OLD) || 1020 (((flags & UFS_ST_MASK) == UFS_ST_SUN || 1021 (flags & UFS_ST_MASK) == UFS_ST_SUNOS || 1022 (flags & UFS_ST_MASK) == UFS_ST_SUNx86) && 1023 (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) { 1024 switch(usb1->fs_clean) { 1025 case UFS_FSCLEAN: 1026 UFSD("fs is clean\n"); 1027 break; 1028 case UFS_FSSTABLE: 1029 UFSD("fs is stable\n"); 1030 break; 1031 case UFS_FSLOG: 1032 UFSD("fs is logging fs\n"); 1033 break; 1034 case UFS_FSOSF1: 1035 UFSD("fs is DEC OSF/1\n"); 1036 break; 1037 case UFS_FSACTIVE: 1038 printk("ufs_read_super: fs is active\n"); 1039 sb->s_flags |= MS_RDONLY; 1040 break; 1041 case UFS_FSBAD: 1042 printk("ufs_read_super: fs is bad\n"); 1043 sb->s_flags |= MS_RDONLY; 1044 break; 1045 default: 1046 printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean); 1047 sb->s_flags |= MS_RDONLY; 1048 break; 1049 } 1050 } else { 1051 printk("ufs_read_super: fs needs fsck\n"); 1052 sb->s_flags |= MS_RDONLY; 1053 } 1054 1055 /* 1056 * Read ufs_super_block into internal data structures 1057 */ 1058 sb->s_op = &ufs_super_ops; 1059 sb->s_export_op = &ufs_export_ops; 1060 1061 sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic); 1062 1063 uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno); 1064 uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno); 1065 uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno); 1066 uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno); 1067 uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset); 1068 uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask); 1069 1070 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { 1071 uspi->s_u2_size = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size); 1072 uspi->s_u2_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize); 1073 } else { 1074 uspi->s_size = fs32_to_cpu(sb, usb1->fs_size); 1075 uspi->s_dsize = fs32_to_cpu(sb, usb1->fs_dsize); 1076 } 1077 1078 uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg); 1079 /* s_bsize already set */ 1080 /* s_fsize already set */ 1081 uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag); 1082 uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree); 1083 uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask); 1084 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask); 1085 uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift); 1086 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift); 1087 UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift, 1088 uspi->s_fshift); 1089 uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift); 1090 uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb); 1091 /* s_sbsize already set */ 1092 uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask); 1093 uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift); 1094 uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir); 1095 uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb); 1096 uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf); 1097 uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3); 1098 uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave); 1099 uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew); 1100 1101 if (uspi->fs_magic == UFS2_MAGIC) 1102 uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr); 1103 else 1104 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr); 1105 1106 uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize); 1107 uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize); 1108 uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak); 1109 uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect); 1110 uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc); 1111 uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg); 1112 uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg); 1113 uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc); 1114 uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize); 1115 uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3); 1116 uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3); 1117 uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos); 1118 uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff); 1119 uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff); 1120 1121 /* 1122 * Compute another frequently used values 1123 */ 1124 uspi->s_fpbmask = uspi->s_fpb - 1; 1125 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) 1126 uspi->s_apbshift = uspi->s_bshift - 3; 1127 else 1128 uspi->s_apbshift = uspi->s_bshift - 2; 1129 1130 uspi->s_2apbshift = uspi->s_apbshift * 2; 1131 uspi->s_3apbshift = uspi->s_apbshift * 3; 1132 uspi->s_apb = 1 << uspi->s_apbshift; 1133 uspi->s_2apb = 1 << uspi->s_2apbshift; 1134 uspi->s_3apb = 1 << uspi->s_3apbshift; 1135 uspi->s_apbmask = uspi->s_apb - 1; 1136 uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS; 1137 uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift; 1138 uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift; 1139 uspi->s_bpf = uspi->s_fsize << 3; 1140 uspi->s_bpfshift = uspi->s_fshift + 3; 1141 uspi->s_bpfmask = uspi->s_bpf - 1; 1142 if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_44BSD || 1143 (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_UFS2) 1144 uspi->s_maxsymlinklen = 1145 fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen); 1146 1147 if (uspi->fs_magic == UFS2_MAGIC) 1148 maxsymlen = 2 * 4 * (UFS_NDADDR + UFS_NINDIR); 1149 else 1150 maxsymlen = 4 * (UFS_NDADDR + UFS_NINDIR); 1151 if (uspi->s_maxsymlinklen > maxsymlen) { 1152 ufs_warning(sb, __func__, "ufs_read_super: excessive maximum " 1153 "fast symlink size (%u)\n", uspi->s_maxsymlinklen); 1154 uspi->s_maxsymlinklen = maxsymlen; 1155 } 1156 sb->s_max_links = UFS_LINK_MAX; 1157 1158 inode = ufs_iget(sb, UFS_ROOTINO); 1159 if (IS_ERR(inode)) { 1160 ret = PTR_ERR(inode); 1161 goto failed; 1162 } 1163 sb->s_root = d_make_root(inode); 1164 if (!sb->s_root) { 1165 ret = -ENOMEM; 1166 goto failed; 1167 } 1168 1169 ufs_setup_cstotal(sb); 1170 /* 1171 * Read cylinder group structures 1172 */ 1173 if (!(sb->s_flags & MS_RDONLY)) 1174 if (!ufs_read_cylinder_structures(sb)) 1175 goto failed; 1176 1177 UFSD("EXIT\n"); 1178 return 0; 1179 1180 failed: 1181 if (ubh) 1182 ubh_brelse_uspi (uspi); 1183 kfree (uspi); 1184 kfree(sbi); 1185 sb->s_fs_info = NULL; 1186 UFSD("EXIT (FAILED)\n"); 1187 return ret; 1188 1189 failed_nomem: 1190 UFSD("EXIT (NOMEM)\n"); 1191 return -ENOMEM; 1192 } 1193 1194 static int ufs_sync_fs(struct super_block *sb, int wait) 1195 { 1196 struct ufs_sb_private_info * uspi; 1197 struct ufs_super_block_first * usb1; 1198 struct ufs_super_block_third * usb3; 1199 unsigned flags; 1200 1201 lock_ufs(sb); 1202 lock_super(sb); 1203 1204 UFSD("ENTER\n"); 1205 1206 flags = UFS_SB(sb)->s_flags; 1207 uspi = UFS_SB(sb)->s_uspi; 1208 usb1 = ubh_get_usb_first(uspi); 1209 usb3 = ubh_get_usb_third(uspi); 1210 1211 usb1->fs_time = cpu_to_fs32(sb, get_seconds()); 1212 if ((flags & UFS_ST_MASK) == UFS_ST_SUN || 1213 (flags & UFS_ST_MASK) == UFS_ST_SUNOS || 1214 (flags & UFS_ST_MASK) == UFS_ST_SUNx86) 1215 ufs_set_fs_state(sb, usb1, usb3, 1216 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time)); 1217 ufs_put_cstotal(sb); 1218 sb->s_dirt = 0; 1219 1220 UFSD("EXIT\n"); 1221 unlock_super(sb); 1222 unlock_ufs(sb); 1223 1224 return 0; 1225 } 1226 1227 static void ufs_write_super(struct super_block *sb) 1228 { 1229 if (!(sb->s_flags & MS_RDONLY)) 1230 ufs_sync_fs(sb, 1); 1231 else 1232 sb->s_dirt = 0; 1233 } 1234 1235 static void ufs_put_super(struct super_block *sb) 1236 { 1237 struct ufs_sb_info * sbi = UFS_SB(sb); 1238 1239 UFSD("ENTER\n"); 1240 1241 if (sb->s_dirt) 1242 ufs_write_super(sb); 1243 1244 if (!(sb->s_flags & MS_RDONLY)) 1245 ufs_put_super_internal(sb); 1246 1247 ubh_brelse_uspi (sbi->s_uspi); 1248 kfree (sbi->s_uspi); 1249 kfree (sbi); 1250 sb->s_fs_info = NULL; 1251 UFSD("EXIT\n"); 1252 return; 1253 } 1254 1255 1256 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data) 1257 { 1258 struct ufs_sb_private_info * uspi; 1259 struct ufs_super_block_first * usb1; 1260 struct ufs_super_block_third * usb3; 1261 unsigned new_mount_opt, ufstype; 1262 unsigned flags; 1263 1264 lock_ufs(sb); 1265 lock_super(sb); 1266 uspi = UFS_SB(sb)->s_uspi; 1267 flags = UFS_SB(sb)->s_flags; 1268 usb1 = ubh_get_usb_first(uspi); 1269 usb3 = ubh_get_usb_third(uspi); 1270 1271 /* 1272 * Allow the "check" option to be passed as a remount option. 1273 * It is not possible to change ufstype option during remount 1274 */ 1275 ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE; 1276 new_mount_opt = 0; 1277 ufs_set_opt (new_mount_opt, ONERROR_LOCK); 1278 if (!ufs_parse_options (data, &new_mount_opt)) { 1279 unlock_super(sb); 1280 unlock_ufs(sb); 1281 return -EINVAL; 1282 } 1283 if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) { 1284 new_mount_opt |= ufstype; 1285 } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) { 1286 printk("ufstype can't be changed during remount\n"); 1287 unlock_super(sb); 1288 unlock_ufs(sb); 1289 return -EINVAL; 1290 } 1291 1292 if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) { 1293 UFS_SB(sb)->s_mount_opt = new_mount_opt; 1294 unlock_super(sb); 1295 unlock_ufs(sb); 1296 return 0; 1297 } 1298 1299 /* 1300 * fs was mouted as rw, remounting ro 1301 */ 1302 if (*mount_flags & MS_RDONLY) { 1303 ufs_put_super_internal(sb); 1304 usb1->fs_time = cpu_to_fs32(sb, get_seconds()); 1305 if ((flags & UFS_ST_MASK) == UFS_ST_SUN 1306 || (flags & UFS_ST_MASK) == UFS_ST_SUNOS 1307 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86) 1308 ufs_set_fs_state(sb, usb1, usb3, 1309 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time)); 1310 ubh_mark_buffer_dirty (USPI_UBH(uspi)); 1311 sb->s_dirt = 0; 1312 sb->s_flags |= MS_RDONLY; 1313 } else { 1314 /* 1315 * fs was mounted as ro, remounting rw 1316 */ 1317 #ifndef CONFIG_UFS_FS_WRITE 1318 printk("ufs was compiled with read-only support, " 1319 "can't be mounted as read-write\n"); 1320 unlock_super(sb); 1321 unlock_ufs(sb); 1322 return -EINVAL; 1323 #else 1324 if (ufstype != UFS_MOUNT_UFSTYPE_SUN && 1325 ufstype != UFS_MOUNT_UFSTYPE_SUNOS && 1326 ufstype != UFS_MOUNT_UFSTYPE_44BSD && 1327 ufstype != UFS_MOUNT_UFSTYPE_SUNx86 && 1328 ufstype != UFS_MOUNT_UFSTYPE_UFS2) { 1329 printk("this ufstype is read-only supported\n"); 1330 unlock_super(sb); 1331 unlock_ufs(sb); 1332 return -EINVAL; 1333 } 1334 if (!ufs_read_cylinder_structures(sb)) { 1335 printk("failed during remounting\n"); 1336 unlock_super(sb); 1337 unlock_ufs(sb); 1338 return -EPERM; 1339 } 1340 sb->s_flags &= ~MS_RDONLY; 1341 #endif 1342 } 1343 UFS_SB(sb)->s_mount_opt = new_mount_opt; 1344 unlock_super(sb); 1345 unlock_ufs(sb); 1346 return 0; 1347 } 1348 1349 static int ufs_show_options(struct seq_file *seq, struct dentry *root) 1350 { 1351 struct ufs_sb_info *sbi = UFS_SB(root->d_sb); 1352 unsigned mval = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE; 1353 const struct match_token *tp = tokens; 1354 1355 while (tp->token != Opt_onerror_panic && tp->token != mval) 1356 ++tp; 1357 BUG_ON(tp->token == Opt_onerror_panic); 1358 seq_printf(seq, ",%s", tp->pattern); 1359 1360 mval = sbi->s_mount_opt & UFS_MOUNT_ONERROR; 1361 while (tp->token != Opt_err && tp->token != mval) 1362 ++tp; 1363 BUG_ON(tp->token == Opt_err); 1364 seq_printf(seq, ",%s", tp->pattern); 1365 1366 return 0; 1367 } 1368 1369 static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf) 1370 { 1371 struct super_block *sb = dentry->d_sb; 1372 struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi; 1373 unsigned flags = UFS_SB(sb)->s_flags; 1374 struct ufs_super_block_first *usb1; 1375 struct ufs_super_block_second *usb2; 1376 struct ufs_super_block_third *usb3; 1377 u64 id = huge_encode_dev(sb->s_bdev->bd_dev); 1378 1379 lock_ufs(sb); 1380 1381 usb1 = ubh_get_usb_first(uspi); 1382 usb2 = ubh_get_usb_second(uspi); 1383 usb3 = ubh_get_usb_third(uspi); 1384 1385 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { 1386 buf->f_type = UFS2_MAGIC; 1387 buf->f_blocks = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize); 1388 } else { 1389 buf->f_type = UFS_MAGIC; 1390 buf->f_blocks = uspi->s_dsize; 1391 } 1392 buf->f_bfree = ufs_blkstofrags(uspi->cs_total.cs_nbfree) + 1393 uspi->cs_total.cs_nffree; 1394 buf->f_ffree = uspi->cs_total.cs_nifree; 1395 buf->f_bsize = sb->s_blocksize; 1396 buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree)) 1397 ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0; 1398 buf->f_files = uspi->s_ncg * uspi->s_ipg; 1399 buf->f_namelen = UFS_MAXNAMLEN; 1400 buf->f_fsid.val[0] = (u32)id; 1401 buf->f_fsid.val[1] = (u32)(id >> 32); 1402 1403 unlock_ufs(sb); 1404 1405 return 0; 1406 } 1407 1408 static struct kmem_cache * ufs_inode_cachep; 1409 1410 static struct inode *ufs_alloc_inode(struct super_block *sb) 1411 { 1412 struct ufs_inode_info *ei; 1413 ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, GFP_NOFS); 1414 if (!ei) 1415 return NULL; 1416 ei->vfs_inode.i_version = 1; 1417 return &ei->vfs_inode; 1418 } 1419 1420 static void ufs_i_callback(struct rcu_head *head) 1421 { 1422 struct inode *inode = container_of(head, struct inode, i_rcu); 1423 kmem_cache_free(ufs_inode_cachep, UFS_I(inode)); 1424 } 1425 1426 static void ufs_destroy_inode(struct inode *inode) 1427 { 1428 call_rcu(&inode->i_rcu, ufs_i_callback); 1429 } 1430 1431 static void init_once(void *foo) 1432 { 1433 struct ufs_inode_info *ei = (struct ufs_inode_info *) foo; 1434 1435 inode_init_once(&ei->vfs_inode); 1436 } 1437 1438 static int init_inodecache(void) 1439 { 1440 ufs_inode_cachep = kmem_cache_create("ufs_inode_cache", 1441 sizeof(struct ufs_inode_info), 1442 0, (SLAB_RECLAIM_ACCOUNT| 1443 SLAB_MEM_SPREAD), 1444 init_once); 1445 if (ufs_inode_cachep == NULL) 1446 return -ENOMEM; 1447 return 0; 1448 } 1449 1450 static void destroy_inodecache(void) 1451 { 1452 kmem_cache_destroy(ufs_inode_cachep); 1453 } 1454 1455 static const struct super_operations ufs_super_ops = { 1456 .alloc_inode = ufs_alloc_inode, 1457 .destroy_inode = ufs_destroy_inode, 1458 .write_inode = ufs_write_inode, 1459 .evict_inode = ufs_evict_inode, 1460 .put_super = ufs_put_super, 1461 .write_super = ufs_write_super, 1462 .sync_fs = ufs_sync_fs, 1463 .statfs = ufs_statfs, 1464 .remount_fs = ufs_remount, 1465 .show_options = ufs_show_options, 1466 }; 1467 1468 static struct dentry *ufs_mount(struct file_system_type *fs_type, 1469 int flags, const char *dev_name, void *data) 1470 { 1471 return mount_bdev(fs_type, flags, dev_name, data, ufs_fill_super); 1472 } 1473 1474 static struct file_system_type ufs_fs_type = { 1475 .owner = THIS_MODULE, 1476 .name = "ufs", 1477 .mount = ufs_mount, 1478 .kill_sb = kill_block_super, 1479 .fs_flags = FS_REQUIRES_DEV, 1480 }; 1481 1482 static int __init init_ufs_fs(void) 1483 { 1484 int err = init_inodecache(); 1485 if (err) 1486 goto out1; 1487 err = register_filesystem(&ufs_fs_type); 1488 if (err) 1489 goto out; 1490 return 0; 1491 out: 1492 destroy_inodecache(); 1493 out1: 1494 return err; 1495 } 1496 1497 static void __exit exit_ufs_fs(void) 1498 { 1499 unregister_filesystem(&ufs_fs_type); 1500 destroy_inodecache(); 1501 } 1502 1503 module_init(init_ufs_fs) 1504 module_exit(exit_ufs_fs) 1505 MODULE_LICENSE("GPL"); 1506