1 /* 2 * linux/fs/ufs/super.c 3 * 4 * Copyright (C) 1998 5 * Daniel Pirkl <daniel.pirkl@email.cz> 6 * Charles University, Faculty of Mathematics and Physics 7 */ 8 9 /* Derived from 10 * 11 * linux/fs/ext2/super.c 12 * 13 * Copyright (C) 1992, 1993, 1994, 1995 14 * Remy Card (card@masi.ibp.fr) 15 * Laboratoire MASI - Institut Blaise Pascal 16 * Universite Pierre et Marie Curie (Paris VI) 17 * 18 * from 19 * 20 * linux/fs/minix/inode.c 21 * 22 * Copyright (C) 1991, 1992 Linus Torvalds 23 * 24 * Big-endian to little-endian byte-swapping/bitmaps by 25 * David S. Miller (davem@caip.rutgers.edu), 1995 26 */ 27 28 /* 29 * Inspired by 30 * 31 * linux/fs/ufs/super.c 32 * 33 * Copyright (C) 1996 34 * Adrian Rodriguez (adrian@franklins-tower.rutgers.edu) 35 * Laboratory for Computer Science Research Computing Facility 36 * Rutgers, The State University of New Jersey 37 * 38 * Copyright (C) 1996 Eddie C. Dost (ecd@skynet.be) 39 * 40 * Kernel module support added on 96/04/26 by 41 * Stefan Reinauer <stepan@home.culture.mipt.ru> 42 * 43 * Module usage counts added on 96/04/29 by 44 * Gertjan van Wingerde <gwingerde@gmail.com> 45 * 46 * Clean swab support on 19970406 by 47 * Francois-Rene Rideau <fare@tunes.org> 48 * 49 * 4.4BSD (FreeBSD) support added on February 1st 1998 by 50 * Niels Kristian Bech Jensen <nkbj@image.dk> partially based 51 * on code by Martin von Loewis <martin@mira.isdn.cs.tu-berlin.de>. 52 * 53 * NeXTstep support added on February 5th 1998 by 54 * Niels Kristian Bech Jensen <nkbj@image.dk>. 55 * 56 * write support Daniel Pirkl <daniel.pirkl@email.cz> 1998 57 * 58 * HP/UX hfs filesystem support added by 59 * Martin K. Petersen <mkp@mkp.net>, August 1999 60 * 61 * UFS2 (of FreeBSD 5.x) support added by 62 * Niraj Kumar <niraj17@iitbombay.org>, Jan 2004 63 * 64 * UFS2 write support added by 65 * Evgeniy Dushistov <dushistov@mail.ru>, 2007 66 */ 67 68 69 #include <linux/exportfs.h> 70 #include <linux/module.h> 71 #include <linux/bitops.h> 72 73 #include <stdarg.h> 74 75 #include <asm/uaccess.h> 76 77 #include <linux/errno.h> 78 #include <linux/fs.h> 79 #include <linux/slab.h> 80 #include <linux/time.h> 81 #include <linux/stat.h> 82 #include <linux/string.h> 83 #include <linux/blkdev.h> 84 #include <linux/init.h> 85 #include <linux/parser.h> 86 #include <linux/buffer_head.h> 87 #include <linux/vfs.h> 88 #include <linux/log2.h> 89 #include <linux/mount.h> 90 #include <linux/seq_file.h> 91 92 #include "ufs_fs.h" 93 #include "ufs.h" 94 #include "swab.h" 95 #include "util.h" 96 97 void lock_ufs(struct super_block *sb) 98 { 99 #if defined(CONFIG_SMP) || defined (CONFIG_PREEMPT) 100 struct ufs_sb_info *sbi = UFS_SB(sb); 101 102 mutex_lock(&sbi->mutex); 103 sbi->mutex_owner = current; 104 #endif 105 } 106 107 void unlock_ufs(struct super_block *sb) 108 { 109 #if defined(CONFIG_SMP) || defined (CONFIG_PREEMPT) 110 struct ufs_sb_info *sbi = UFS_SB(sb); 111 112 sbi->mutex_owner = NULL; 113 mutex_unlock(&sbi->mutex); 114 #endif 115 } 116 117 static struct inode *ufs_nfs_get_inode(struct super_block *sb, u64 ino, u32 generation) 118 { 119 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 120 struct inode *inode; 121 122 if (ino < UFS_ROOTINO || ino > uspi->s_ncg * uspi->s_ipg) 123 return ERR_PTR(-ESTALE); 124 125 inode = ufs_iget(sb, ino); 126 if (IS_ERR(inode)) 127 return ERR_CAST(inode); 128 if (generation && inode->i_generation != generation) { 129 iput(inode); 130 return ERR_PTR(-ESTALE); 131 } 132 return inode; 133 } 134 135 static struct dentry *ufs_fh_to_dentry(struct super_block *sb, struct fid *fid, 136 int fh_len, int fh_type) 137 { 138 return generic_fh_to_dentry(sb, fid, fh_len, fh_type, ufs_nfs_get_inode); 139 } 140 141 static struct dentry *ufs_fh_to_parent(struct super_block *sb, struct fid *fid, 142 int fh_len, int fh_type) 143 { 144 return generic_fh_to_parent(sb, fid, fh_len, fh_type, ufs_nfs_get_inode); 145 } 146 147 static struct dentry *ufs_get_parent(struct dentry *child) 148 { 149 struct qstr dot_dot = QSTR_INIT("..", 2); 150 ino_t ino; 151 152 ino = ufs_inode_by_name(child->d_inode, &dot_dot); 153 if (!ino) 154 return ERR_PTR(-ENOENT); 155 return d_obtain_alias(ufs_iget(child->d_inode->i_sb, ino)); 156 } 157 158 static const struct export_operations ufs_export_ops = { 159 .fh_to_dentry = ufs_fh_to_dentry, 160 .fh_to_parent = ufs_fh_to_parent, 161 .get_parent = ufs_get_parent, 162 }; 163 164 #ifdef CONFIG_UFS_DEBUG 165 /* 166 * Print contents of ufs_super_block, useful for debugging 167 */ 168 static void ufs_print_super_stuff(struct super_block *sb, 169 struct ufs_super_block_first *usb1, 170 struct ufs_super_block_second *usb2, 171 struct ufs_super_block_third *usb3) 172 { 173 u32 magic = fs32_to_cpu(sb, usb3->fs_magic); 174 175 printk("ufs_print_super_stuff\n"); 176 printk(" magic: 0x%x\n", magic); 177 if (fs32_to_cpu(sb, usb3->fs_magic) == UFS2_MAGIC) { 178 printk(" fs_size: %llu\n", (unsigned long long) 179 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size)); 180 printk(" fs_dsize: %llu\n", (unsigned long long) 181 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize)); 182 printk(" bsize: %u\n", 183 fs32_to_cpu(sb, usb1->fs_bsize)); 184 printk(" fsize: %u\n", 185 fs32_to_cpu(sb, usb1->fs_fsize)); 186 printk(" fs_volname: %s\n", usb2->fs_un.fs_u2.fs_volname); 187 printk(" fs_sblockloc: %llu\n", (unsigned long long) 188 fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc)); 189 printk(" cs_ndir(No of dirs): %llu\n", (unsigned long long) 190 fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir)); 191 printk(" cs_nbfree(No of free blocks): %llu\n", 192 (unsigned long long) 193 fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree)); 194 printk(KERN_INFO" cs_nifree(Num of free inodes): %llu\n", 195 (unsigned long long) 196 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree)); 197 printk(KERN_INFO" cs_nffree(Num of free frags): %llu\n", 198 (unsigned long long) 199 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree)); 200 printk(KERN_INFO" fs_maxsymlinklen: %u\n", 201 fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen)); 202 } else { 203 printk(" sblkno: %u\n", fs32_to_cpu(sb, usb1->fs_sblkno)); 204 printk(" cblkno: %u\n", fs32_to_cpu(sb, usb1->fs_cblkno)); 205 printk(" iblkno: %u\n", fs32_to_cpu(sb, usb1->fs_iblkno)); 206 printk(" dblkno: %u\n", fs32_to_cpu(sb, usb1->fs_dblkno)); 207 printk(" cgoffset: %u\n", 208 fs32_to_cpu(sb, usb1->fs_cgoffset)); 209 printk(" ~cgmask: 0x%x\n", 210 ~fs32_to_cpu(sb, usb1->fs_cgmask)); 211 printk(" size: %u\n", fs32_to_cpu(sb, usb1->fs_size)); 212 printk(" dsize: %u\n", fs32_to_cpu(sb, usb1->fs_dsize)); 213 printk(" ncg: %u\n", fs32_to_cpu(sb, usb1->fs_ncg)); 214 printk(" bsize: %u\n", fs32_to_cpu(sb, usb1->fs_bsize)); 215 printk(" fsize: %u\n", fs32_to_cpu(sb, usb1->fs_fsize)); 216 printk(" frag: %u\n", fs32_to_cpu(sb, usb1->fs_frag)); 217 printk(" fragshift: %u\n", 218 fs32_to_cpu(sb, usb1->fs_fragshift)); 219 printk(" ~fmask: %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask)); 220 printk(" fshift: %u\n", fs32_to_cpu(sb, usb1->fs_fshift)); 221 printk(" sbsize: %u\n", fs32_to_cpu(sb, usb1->fs_sbsize)); 222 printk(" spc: %u\n", fs32_to_cpu(sb, usb1->fs_spc)); 223 printk(" cpg: %u\n", fs32_to_cpu(sb, usb1->fs_cpg)); 224 printk(" ipg: %u\n", fs32_to_cpu(sb, usb1->fs_ipg)); 225 printk(" fpg: %u\n", fs32_to_cpu(sb, usb1->fs_fpg)); 226 printk(" csaddr: %u\n", fs32_to_cpu(sb, usb1->fs_csaddr)); 227 printk(" cssize: %u\n", fs32_to_cpu(sb, usb1->fs_cssize)); 228 printk(" cgsize: %u\n", fs32_to_cpu(sb, usb1->fs_cgsize)); 229 printk(" fstodb: %u\n", 230 fs32_to_cpu(sb, usb1->fs_fsbtodb)); 231 printk(" nrpos: %u\n", fs32_to_cpu(sb, usb3->fs_nrpos)); 232 printk(" ndir %u\n", 233 fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir)); 234 printk(" nifree %u\n", 235 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree)); 236 printk(" nbfree %u\n", 237 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree)); 238 printk(" nffree %u\n", 239 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree)); 240 } 241 printk("\n"); 242 } 243 244 /* 245 * Print contents of ufs_cylinder_group, useful for debugging 246 */ 247 static void ufs_print_cylinder_stuff(struct super_block *sb, 248 struct ufs_cylinder_group *cg) 249 { 250 printk("\nufs_print_cylinder_stuff\n"); 251 printk("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group)); 252 printk(" magic: %x\n", fs32_to_cpu(sb, cg->cg_magic)); 253 printk(" time: %u\n", fs32_to_cpu(sb, cg->cg_time)); 254 printk(" cgx: %u\n", fs32_to_cpu(sb, cg->cg_cgx)); 255 printk(" ncyl: %u\n", fs16_to_cpu(sb, cg->cg_ncyl)); 256 printk(" niblk: %u\n", fs16_to_cpu(sb, cg->cg_niblk)); 257 printk(" ndblk: %u\n", fs32_to_cpu(sb, cg->cg_ndblk)); 258 printk(" cs_ndir: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir)); 259 printk(" cs_nbfree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree)); 260 printk(" cs_nifree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree)); 261 printk(" cs_nffree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree)); 262 printk(" rotor: %u\n", fs32_to_cpu(sb, cg->cg_rotor)); 263 printk(" frotor: %u\n", fs32_to_cpu(sb, cg->cg_frotor)); 264 printk(" irotor: %u\n", fs32_to_cpu(sb, cg->cg_irotor)); 265 printk(" frsum: %u, %u, %u, %u, %u, %u, %u, %u\n", 266 fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]), 267 fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]), 268 fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]), 269 fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7])); 270 printk(" btotoff: %u\n", fs32_to_cpu(sb, cg->cg_btotoff)); 271 printk(" boff: %u\n", fs32_to_cpu(sb, cg->cg_boff)); 272 printk(" iuseoff: %u\n", fs32_to_cpu(sb, cg->cg_iusedoff)); 273 printk(" freeoff: %u\n", fs32_to_cpu(sb, cg->cg_freeoff)); 274 printk(" nextfreeoff: %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff)); 275 printk(" clustersumoff %u\n", 276 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff)); 277 printk(" clusteroff %u\n", 278 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff)); 279 printk(" nclusterblks %u\n", 280 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks)); 281 printk("\n"); 282 } 283 #else 284 # define ufs_print_super_stuff(sb, usb1, usb2, usb3) /**/ 285 # define ufs_print_cylinder_stuff(sb, cg) /**/ 286 #endif /* CONFIG_UFS_DEBUG */ 287 288 static const struct super_operations ufs_super_ops; 289 290 static char error_buf[1024]; 291 292 void ufs_error (struct super_block * sb, const char * function, 293 const char * fmt, ...) 294 { 295 struct ufs_sb_private_info * uspi; 296 struct ufs_super_block_first * usb1; 297 va_list args; 298 299 uspi = UFS_SB(sb)->s_uspi; 300 usb1 = ubh_get_usb_first(uspi); 301 302 if (!(sb->s_flags & MS_RDONLY)) { 303 usb1->fs_clean = UFS_FSBAD; 304 ubh_mark_buffer_dirty(USPI_UBH(uspi)); 305 ufs_mark_sb_dirty(sb); 306 sb->s_flags |= MS_RDONLY; 307 } 308 va_start (args, fmt); 309 vsnprintf (error_buf, sizeof(error_buf), fmt, args); 310 va_end (args); 311 switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) { 312 case UFS_MOUNT_ONERROR_PANIC: 313 panic ("UFS-fs panic (device %s): %s: %s\n", 314 sb->s_id, function, error_buf); 315 316 case UFS_MOUNT_ONERROR_LOCK: 317 case UFS_MOUNT_ONERROR_UMOUNT: 318 case UFS_MOUNT_ONERROR_REPAIR: 319 printk (KERN_CRIT "UFS-fs error (device %s): %s: %s\n", 320 sb->s_id, function, error_buf); 321 } 322 } 323 324 void ufs_panic (struct super_block * sb, const char * function, 325 const char * fmt, ...) 326 { 327 struct ufs_sb_private_info * uspi; 328 struct ufs_super_block_first * usb1; 329 va_list args; 330 331 uspi = UFS_SB(sb)->s_uspi; 332 usb1 = ubh_get_usb_first(uspi); 333 334 if (!(sb->s_flags & MS_RDONLY)) { 335 usb1->fs_clean = UFS_FSBAD; 336 ubh_mark_buffer_dirty(USPI_UBH(uspi)); 337 ufs_mark_sb_dirty(sb); 338 } 339 va_start (args, fmt); 340 vsnprintf (error_buf, sizeof(error_buf), fmt, args); 341 va_end (args); 342 sb->s_flags |= MS_RDONLY; 343 printk (KERN_CRIT "UFS-fs panic (device %s): %s: %s\n", 344 sb->s_id, function, error_buf); 345 } 346 347 void ufs_warning (struct super_block * sb, const char * function, 348 const char * fmt, ...) 349 { 350 va_list args; 351 352 va_start (args, fmt); 353 vsnprintf (error_buf, sizeof(error_buf), fmt, args); 354 va_end (args); 355 printk (KERN_WARNING "UFS-fs warning (device %s): %s: %s\n", 356 sb->s_id, function, error_buf); 357 } 358 359 enum { 360 Opt_type_old = UFS_MOUNT_UFSTYPE_OLD, 361 Opt_type_sunx86 = UFS_MOUNT_UFSTYPE_SUNx86, 362 Opt_type_sun = UFS_MOUNT_UFSTYPE_SUN, 363 Opt_type_sunos = UFS_MOUNT_UFSTYPE_SUNOS, 364 Opt_type_44bsd = UFS_MOUNT_UFSTYPE_44BSD, 365 Opt_type_ufs2 = UFS_MOUNT_UFSTYPE_UFS2, 366 Opt_type_hp = UFS_MOUNT_UFSTYPE_HP, 367 Opt_type_nextstepcd = UFS_MOUNT_UFSTYPE_NEXTSTEP_CD, 368 Opt_type_nextstep = UFS_MOUNT_UFSTYPE_NEXTSTEP, 369 Opt_type_openstep = UFS_MOUNT_UFSTYPE_OPENSTEP, 370 Opt_onerror_panic = UFS_MOUNT_ONERROR_PANIC, 371 Opt_onerror_lock = UFS_MOUNT_ONERROR_LOCK, 372 Opt_onerror_umount = UFS_MOUNT_ONERROR_UMOUNT, 373 Opt_onerror_repair = UFS_MOUNT_ONERROR_REPAIR, 374 Opt_err 375 }; 376 377 static const match_table_t tokens = { 378 {Opt_type_old, "ufstype=old"}, 379 {Opt_type_sunx86, "ufstype=sunx86"}, 380 {Opt_type_sun, "ufstype=sun"}, 381 {Opt_type_sunos, "ufstype=sunos"}, 382 {Opt_type_44bsd, "ufstype=44bsd"}, 383 {Opt_type_ufs2, "ufstype=ufs2"}, 384 {Opt_type_ufs2, "ufstype=5xbsd"}, 385 {Opt_type_hp, "ufstype=hp"}, 386 {Opt_type_nextstepcd, "ufstype=nextstep-cd"}, 387 {Opt_type_nextstep, "ufstype=nextstep"}, 388 {Opt_type_openstep, "ufstype=openstep"}, 389 /*end of possible ufs types */ 390 {Opt_onerror_panic, "onerror=panic"}, 391 {Opt_onerror_lock, "onerror=lock"}, 392 {Opt_onerror_umount, "onerror=umount"}, 393 {Opt_onerror_repair, "onerror=repair"}, 394 {Opt_err, NULL} 395 }; 396 397 static int ufs_parse_options (char * options, unsigned * mount_options) 398 { 399 char * p; 400 401 UFSD("ENTER\n"); 402 403 if (!options) 404 return 1; 405 406 while ((p = strsep(&options, ",")) != NULL) { 407 substring_t args[MAX_OPT_ARGS]; 408 int token; 409 if (!*p) 410 continue; 411 412 token = match_token(p, tokens, args); 413 switch (token) { 414 case Opt_type_old: 415 ufs_clear_opt (*mount_options, UFSTYPE); 416 ufs_set_opt (*mount_options, UFSTYPE_OLD); 417 break; 418 case Opt_type_sunx86: 419 ufs_clear_opt (*mount_options, UFSTYPE); 420 ufs_set_opt (*mount_options, UFSTYPE_SUNx86); 421 break; 422 case Opt_type_sun: 423 ufs_clear_opt (*mount_options, UFSTYPE); 424 ufs_set_opt (*mount_options, UFSTYPE_SUN); 425 break; 426 case Opt_type_sunos: 427 ufs_clear_opt(*mount_options, UFSTYPE); 428 ufs_set_opt(*mount_options, UFSTYPE_SUNOS); 429 break; 430 case Opt_type_44bsd: 431 ufs_clear_opt (*mount_options, UFSTYPE); 432 ufs_set_opt (*mount_options, UFSTYPE_44BSD); 433 break; 434 case Opt_type_ufs2: 435 ufs_clear_opt(*mount_options, UFSTYPE); 436 ufs_set_opt(*mount_options, UFSTYPE_UFS2); 437 break; 438 case Opt_type_hp: 439 ufs_clear_opt (*mount_options, UFSTYPE); 440 ufs_set_opt (*mount_options, UFSTYPE_HP); 441 break; 442 case Opt_type_nextstepcd: 443 ufs_clear_opt (*mount_options, UFSTYPE); 444 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD); 445 break; 446 case Opt_type_nextstep: 447 ufs_clear_opt (*mount_options, UFSTYPE); 448 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP); 449 break; 450 case Opt_type_openstep: 451 ufs_clear_opt (*mount_options, UFSTYPE); 452 ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP); 453 break; 454 case Opt_onerror_panic: 455 ufs_clear_opt (*mount_options, ONERROR); 456 ufs_set_opt (*mount_options, ONERROR_PANIC); 457 break; 458 case Opt_onerror_lock: 459 ufs_clear_opt (*mount_options, ONERROR); 460 ufs_set_opt (*mount_options, ONERROR_LOCK); 461 break; 462 case Opt_onerror_umount: 463 ufs_clear_opt (*mount_options, ONERROR); 464 ufs_set_opt (*mount_options, ONERROR_UMOUNT); 465 break; 466 case Opt_onerror_repair: 467 printk("UFS-fs: Unable to do repair on error, " 468 "will lock lock instead\n"); 469 ufs_clear_opt (*mount_options, ONERROR); 470 ufs_set_opt (*mount_options, ONERROR_REPAIR); 471 break; 472 default: 473 printk("UFS-fs: Invalid option: \"%s\" " 474 "or missing value\n", p); 475 return 0; 476 } 477 } 478 return 1; 479 } 480 481 /* 482 * Different types of UFS hold fs_cstotal in different 483 * places, and use different data structure for it. 484 * To make things simpler we just copy fs_cstotal to ufs_sb_private_info 485 */ 486 static void ufs_setup_cstotal(struct super_block *sb) 487 { 488 struct ufs_sb_info *sbi = UFS_SB(sb); 489 struct ufs_sb_private_info *uspi = sbi->s_uspi; 490 struct ufs_super_block_first *usb1; 491 struct ufs_super_block_second *usb2; 492 struct ufs_super_block_third *usb3; 493 unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE; 494 495 UFSD("ENTER, mtype=%u\n", mtype); 496 usb1 = ubh_get_usb_first(uspi); 497 usb2 = ubh_get_usb_second(uspi); 498 usb3 = ubh_get_usb_third(uspi); 499 500 if ((mtype == UFS_MOUNT_UFSTYPE_44BSD && 501 (usb1->fs_flags & UFS_FLAGS_UPDATED)) || 502 mtype == UFS_MOUNT_UFSTYPE_UFS2) { 503 /*we have statistic in different place, then usual*/ 504 uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir); 505 uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree); 506 uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree); 507 uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree); 508 } else { 509 uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir); 510 uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree); 511 uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree); 512 uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree); 513 } 514 UFSD("EXIT\n"); 515 } 516 517 /* 518 * Read on-disk structures associated with cylinder groups 519 */ 520 static int ufs_read_cylinder_structures(struct super_block *sb) 521 { 522 struct ufs_sb_info *sbi = UFS_SB(sb); 523 struct ufs_sb_private_info *uspi = sbi->s_uspi; 524 struct ufs_buffer_head * ubh; 525 unsigned char * base, * space; 526 unsigned size, blks, i; 527 528 UFSD("ENTER\n"); 529 530 /* 531 * Read cs structures from (usually) first data block 532 * on the device. 533 */ 534 size = uspi->s_cssize; 535 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift; 536 base = space = kmalloc(size, GFP_NOFS); 537 if (!base) 538 goto failed; 539 sbi->s_csp = (struct ufs_csum *)space; 540 for (i = 0; i < blks; i += uspi->s_fpb) { 541 size = uspi->s_bsize; 542 if (i + uspi->s_fpb > blks) 543 size = (blks - i) * uspi->s_fsize; 544 545 ubh = ubh_bread(sb, uspi->s_csaddr + i, size); 546 547 if (!ubh) 548 goto failed; 549 550 ubh_ubhcpymem (space, ubh, size); 551 552 space += size; 553 ubh_brelse (ubh); 554 ubh = NULL; 555 } 556 557 /* 558 * Read cylinder group (we read only first fragment from block 559 * at this time) and prepare internal data structures for cg caching. 560 */ 561 if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_NOFS))) 562 goto failed; 563 for (i = 0; i < uspi->s_ncg; i++) 564 sbi->s_ucg[i] = NULL; 565 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) { 566 sbi->s_ucpi[i] = NULL; 567 sbi->s_cgno[i] = UFS_CGNO_EMPTY; 568 } 569 for (i = 0; i < uspi->s_ncg; i++) { 570 UFSD("read cg %u\n", i); 571 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i)))) 572 goto failed; 573 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data)) 574 goto failed; 575 576 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data); 577 } 578 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) { 579 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_NOFS))) 580 goto failed; 581 sbi->s_cgno[i] = UFS_CGNO_EMPTY; 582 } 583 sbi->s_cg_loaded = 0; 584 UFSD("EXIT\n"); 585 return 1; 586 587 failed: 588 kfree (base); 589 if (sbi->s_ucg) { 590 for (i = 0; i < uspi->s_ncg; i++) 591 if (sbi->s_ucg[i]) 592 brelse (sbi->s_ucg[i]); 593 kfree (sbi->s_ucg); 594 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) 595 kfree (sbi->s_ucpi[i]); 596 } 597 UFSD("EXIT (FAILED)\n"); 598 return 0; 599 } 600 601 /* 602 * Sync our internal copy of fs_cstotal with disk 603 */ 604 static void ufs_put_cstotal(struct super_block *sb) 605 { 606 unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE; 607 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 608 struct ufs_super_block_first *usb1; 609 struct ufs_super_block_second *usb2; 610 struct ufs_super_block_third *usb3; 611 612 UFSD("ENTER\n"); 613 usb1 = ubh_get_usb_first(uspi); 614 usb2 = ubh_get_usb_second(uspi); 615 usb3 = ubh_get_usb_third(uspi); 616 617 if ((mtype == UFS_MOUNT_UFSTYPE_44BSD && 618 (usb1->fs_flags & UFS_FLAGS_UPDATED)) || 619 mtype == UFS_MOUNT_UFSTYPE_UFS2) { 620 /*we have statistic in different place, then usual*/ 621 usb2->fs_un.fs_u2.cs_ndir = 622 cpu_to_fs64(sb, uspi->cs_total.cs_ndir); 623 usb2->fs_un.fs_u2.cs_nbfree = 624 cpu_to_fs64(sb, uspi->cs_total.cs_nbfree); 625 usb3->fs_un1.fs_u2.cs_nifree = 626 cpu_to_fs64(sb, uspi->cs_total.cs_nifree); 627 usb3->fs_un1.fs_u2.cs_nffree = 628 cpu_to_fs64(sb, uspi->cs_total.cs_nffree); 629 } else { 630 usb1->fs_cstotal.cs_ndir = 631 cpu_to_fs32(sb, uspi->cs_total.cs_ndir); 632 usb1->fs_cstotal.cs_nbfree = 633 cpu_to_fs32(sb, uspi->cs_total.cs_nbfree); 634 usb1->fs_cstotal.cs_nifree = 635 cpu_to_fs32(sb, uspi->cs_total.cs_nifree); 636 usb1->fs_cstotal.cs_nffree = 637 cpu_to_fs32(sb, uspi->cs_total.cs_nffree); 638 } 639 ubh_mark_buffer_dirty(USPI_UBH(uspi)); 640 ufs_print_super_stuff(sb, usb1, usb2, usb3); 641 UFSD("EXIT\n"); 642 } 643 644 /** 645 * ufs_put_super_internal() - put on-disk intrenal structures 646 * @sb: pointer to super_block structure 647 * Put on-disk structures associated with cylinder groups 648 * and write them back to disk, also update cs_total on disk 649 */ 650 static void ufs_put_super_internal(struct super_block *sb) 651 { 652 struct ufs_sb_info *sbi = UFS_SB(sb); 653 struct ufs_sb_private_info *uspi = sbi->s_uspi; 654 struct ufs_buffer_head * ubh; 655 unsigned char * base, * space; 656 unsigned blks, size, i; 657 658 659 UFSD("ENTER\n"); 660 661 ufs_put_cstotal(sb); 662 size = uspi->s_cssize; 663 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift; 664 base = space = (char*) sbi->s_csp; 665 for (i = 0; i < blks; i += uspi->s_fpb) { 666 size = uspi->s_bsize; 667 if (i + uspi->s_fpb > blks) 668 size = (blks - i) * uspi->s_fsize; 669 670 ubh = ubh_bread(sb, uspi->s_csaddr + i, size); 671 672 ubh_memcpyubh (ubh, space, size); 673 space += size; 674 ubh_mark_buffer_uptodate (ubh, 1); 675 ubh_mark_buffer_dirty (ubh); 676 ubh_brelse (ubh); 677 } 678 for (i = 0; i < sbi->s_cg_loaded; i++) { 679 ufs_put_cylinder (sb, i); 680 kfree (sbi->s_ucpi[i]); 681 } 682 for (; i < UFS_MAX_GROUP_LOADED; i++) 683 kfree (sbi->s_ucpi[i]); 684 for (i = 0; i < uspi->s_ncg; i++) 685 brelse (sbi->s_ucg[i]); 686 kfree (sbi->s_ucg); 687 kfree (base); 688 689 UFSD("EXIT\n"); 690 } 691 692 static int ufs_sync_fs(struct super_block *sb, int wait) 693 { 694 struct ufs_sb_private_info * uspi; 695 struct ufs_super_block_first * usb1; 696 struct ufs_super_block_third * usb3; 697 unsigned flags; 698 699 lock_ufs(sb); 700 701 UFSD("ENTER\n"); 702 703 flags = UFS_SB(sb)->s_flags; 704 uspi = UFS_SB(sb)->s_uspi; 705 usb1 = ubh_get_usb_first(uspi); 706 usb3 = ubh_get_usb_third(uspi); 707 708 usb1->fs_time = cpu_to_fs32(sb, get_seconds()); 709 if ((flags & UFS_ST_MASK) == UFS_ST_SUN || 710 (flags & UFS_ST_MASK) == UFS_ST_SUNOS || 711 (flags & UFS_ST_MASK) == UFS_ST_SUNx86) 712 ufs_set_fs_state(sb, usb1, usb3, 713 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time)); 714 ufs_put_cstotal(sb); 715 716 UFSD("EXIT\n"); 717 unlock_ufs(sb); 718 719 return 0; 720 } 721 722 static void delayed_sync_fs(struct work_struct *work) 723 { 724 struct ufs_sb_info *sbi; 725 726 sbi = container_of(work, struct ufs_sb_info, sync_work.work); 727 728 spin_lock(&sbi->work_lock); 729 sbi->work_queued = 0; 730 spin_unlock(&sbi->work_lock); 731 732 ufs_sync_fs(sbi->sb, 1); 733 } 734 735 void ufs_mark_sb_dirty(struct super_block *sb) 736 { 737 struct ufs_sb_info *sbi = UFS_SB(sb); 738 unsigned long delay; 739 740 spin_lock(&sbi->work_lock); 741 if (!sbi->work_queued) { 742 delay = msecs_to_jiffies(dirty_writeback_interval * 10); 743 queue_delayed_work(system_long_wq, &sbi->sync_work, delay); 744 sbi->work_queued = 1; 745 } 746 spin_unlock(&sbi->work_lock); 747 } 748 749 static void ufs_put_super(struct super_block *sb) 750 { 751 struct ufs_sb_info * sbi = UFS_SB(sb); 752 753 UFSD("ENTER\n"); 754 755 if (!(sb->s_flags & MS_RDONLY)) 756 ufs_put_super_internal(sb); 757 cancel_delayed_work_sync(&sbi->sync_work); 758 759 ubh_brelse_uspi (sbi->s_uspi); 760 kfree (sbi->s_uspi); 761 mutex_destroy(&sbi->mutex); 762 kfree (sbi); 763 sb->s_fs_info = NULL; 764 UFSD("EXIT\n"); 765 return; 766 } 767 768 static int ufs_fill_super(struct super_block *sb, void *data, int silent) 769 { 770 struct ufs_sb_info * sbi; 771 struct ufs_sb_private_info * uspi; 772 struct ufs_super_block_first * usb1; 773 struct ufs_super_block_second * usb2; 774 struct ufs_super_block_third * usb3; 775 struct ufs_buffer_head * ubh; 776 struct inode *inode; 777 unsigned block_size, super_block_size; 778 unsigned flags; 779 unsigned super_block_offset; 780 unsigned maxsymlen; 781 int ret = -EINVAL; 782 783 uspi = NULL; 784 ubh = NULL; 785 flags = 0; 786 787 UFSD("ENTER\n"); 788 789 #ifndef CONFIG_UFS_FS_WRITE 790 if (!(sb->s_flags & MS_RDONLY)) { 791 printk("ufs was compiled with read-only support, " 792 "can't be mounted as read-write\n"); 793 return -EROFS; 794 } 795 #endif 796 797 sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL); 798 if (!sbi) 799 goto failed_nomem; 800 sb->s_fs_info = sbi; 801 sbi->sb = sb; 802 803 UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY)); 804 805 mutex_init(&sbi->mutex); 806 spin_lock_init(&sbi->work_lock); 807 INIT_DELAYED_WORK(&sbi->sync_work, delayed_sync_fs); 808 /* 809 * Set default mount options 810 * Parse mount options 811 */ 812 sbi->s_mount_opt = 0; 813 ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK); 814 if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) { 815 printk("wrong mount options\n"); 816 goto failed; 817 } 818 if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) { 819 if (!silent) 820 printk("You didn't specify the type of your ufs filesystem\n\n" 821 "mount -t ufs -o ufstype=" 822 "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n" 823 ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, " 824 "default is ufstype=old\n"); 825 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD); 826 } 827 828 uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL); 829 sbi->s_uspi = uspi; 830 if (!uspi) 831 goto failed; 832 uspi->s_dirblksize = UFS_SECTOR_SIZE; 833 super_block_offset=UFS_SBLOCK; 834 835 /* Keep 2Gig file limit. Some UFS variants need to override 836 this but as I don't know which I'll let those in the know loosen 837 the rules */ 838 switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) { 839 case UFS_MOUNT_UFSTYPE_44BSD: 840 UFSD("ufstype=44bsd\n"); 841 uspi->s_fsize = block_size = 512; 842 uspi->s_fmask = ~(512 - 1); 843 uspi->s_fshift = 9; 844 uspi->s_sbsize = super_block_size = 1536; 845 uspi->s_sbbase = 0; 846 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; 847 break; 848 case UFS_MOUNT_UFSTYPE_UFS2: 849 UFSD("ufstype=ufs2\n"); 850 super_block_offset=SBLOCK_UFS2; 851 uspi->s_fsize = block_size = 512; 852 uspi->s_fmask = ~(512 - 1); 853 uspi->s_fshift = 9; 854 uspi->s_sbsize = super_block_size = 1536; 855 uspi->s_sbbase = 0; 856 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; 857 break; 858 859 case UFS_MOUNT_UFSTYPE_SUN: 860 UFSD("ufstype=sun\n"); 861 uspi->s_fsize = block_size = 1024; 862 uspi->s_fmask = ~(1024 - 1); 863 uspi->s_fshift = 10; 864 uspi->s_sbsize = super_block_size = 2048; 865 uspi->s_sbbase = 0; 866 uspi->s_maxsymlinklen = 0; /* Not supported on disk */ 867 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN; 868 break; 869 870 case UFS_MOUNT_UFSTYPE_SUNOS: 871 UFSD(("ufstype=sunos\n")) 872 uspi->s_fsize = block_size = 1024; 873 uspi->s_fmask = ~(1024 - 1); 874 uspi->s_fshift = 10; 875 uspi->s_sbsize = 2048; 876 super_block_size = 2048; 877 uspi->s_sbbase = 0; 878 uspi->s_maxsymlinklen = 0; /* Not supported on disk */ 879 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_SUNOS | UFS_CG_SUN; 880 break; 881 882 case UFS_MOUNT_UFSTYPE_SUNx86: 883 UFSD("ufstype=sunx86\n"); 884 uspi->s_fsize = block_size = 1024; 885 uspi->s_fmask = ~(1024 - 1); 886 uspi->s_fshift = 10; 887 uspi->s_sbsize = super_block_size = 2048; 888 uspi->s_sbbase = 0; 889 uspi->s_maxsymlinklen = 0; /* Not supported on disk */ 890 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN; 891 break; 892 893 case UFS_MOUNT_UFSTYPE_OLD: 894 UFSD("ufstype=old\n"); 895 uspi->s_fsize = block_size = 1024; 896 uspi->s_fmask = ~(1024 - 1); 897 uspi->s_fshift = 10; 898 uspi->s_sbsize = super_block_size = 2048; 899 uspi->s_sbbase = 0; 900 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 901 if (!(sb->s_flags & MS_RDONLY)) { 902 if (!silent) 903 printk(KERN_INFO "ufstype=old is supported read-only\n"); 904 sb->s_flags |= MS_RDONLY; 905 } 906 break; 907 908 case UFS_MOUNT_UFSTYPE_NEXTSTEP: 909 UFSD("ufstype=nextstep\n"); 910 uspi->s_fsize = block_size = 1024; 911 uspi->s_fmask = ~(1024 - 1); 912 uspi->s_fshift = 10; 913 uspi->s_sbsize = super_block_size = 2048; 914 uspi->s_sbbase = 0; 915 uspi->s_dirblksize = 1024; 916 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 917 if (!(sb->s_flags & MS_RDONLY)) { 918 if (!silent) 919 printk(KERN_INFO "ufstype=nextstep is supported read-only\n"); 920 sb->s_flags |= MS_RDONLY; 921 } 922 break; 923 924 case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD: 925 UFSD("ufstype=nextstep-cd\n"); 926 uspi->s_fsize = block_size = 2048; 927 uspi->s_fmask = ~(2048 - 1); 928 uspi->s_fshift = 11; 929 uspi->s_sbsize = super_block_size = 2048; 930 uspi->s_sbbase = 0; 931 uspi->s_dirblksize = 1024; 932 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 933 if (!(sb->s_flags & MS_RDONLY)) { 934 if (!silent) 935 printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n"); 936 sb->s_flags |= MS_RDONLY; 937 } 938 break; 939 940 case UFS_MOUNT_UFSTYPE_OPENSTEP: 941 UFSD("ufstype=openstep\n"); 942 uspi->s_fsize = block_size = 1024; 943 uspi->s_fmask = ~(1024 - 1); 944 uspi->s_fshift = 10; 945 uspi->s_sbsize = super_block_size = 2048; 946 uspi->s_sbbase = 0; 947 uspi->s_dirblksize = 1024; 948 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; 949 if (!(sb->s_flags & MS_RDONLY)) { 950 if (!silent) 951 printk(KERN_INFO "ufstype=openstep is supported read-only\n"); 952 sb->s_flags |= MS_RDONLY; 953 } 954 break; 955 956 case UFS_MOUNT_UFSTYPE_HP: 957 UFSD("ufstype=hp\n"); 958 uspi->s_fsize = block_size = 1024; 959 uspi->s_fmask = ~(1024 - 1); 960 uspi->s_fshift = 10; 961 uspi->s_sbsize = super_block_size = 2048; 962 uspi->s_sbbase = 0; 963 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 964 if (!(sb->s_flags & MS_RDONLY)) { 965 if (!silent) 966 printk(KERN_INFO "ufstype=hp is supported read-only\n"); 967 sb->s_flags |= MS_RDONLY; 968 } 969 break; 970 default: 971 if (!silent) 972 printk("unknown ufstype\n"); 973 goto failed; 974 } 975 976 again: 977 if (!sb_set_blocksize(sb, block_size)) { 978 printk(KERN_ERR "UFS: failed to set blocksize\n"); 979 goto failed; 980 } 981 982 /* 983 * read ufs super block from device 984 */ 985 986 ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size); 987 988 if (!ubh) 989 goto failed; 990 991 usb1 = ubh_get_usb_first(uspi); 992 usb2 = ubh_get_usb_second(uspi); 993 usb3 = ubh_get_usb_third(uspi); 994 995 /* Sort out mod used on SunOS 4.1.3 for fs_state */ 996 uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat); 997 if (((flags & UFS_ST_MASK) == UFS_ST_SUNOS) && 998 (uspi->s_postblformat != UFS_42POSTBLFMT)) { 999 flags &= ~UFS_ST_MASK; 1000 flags |= UFS_ST_SUN; 1001 } 1002 1003 /* 1004 * Check ufs magic number 1005 */ 1006 sbi->s_bytesex = BYTESEX_LE; 1007 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) { 1008 case UFS_MAGIC: 1009 case UFS_MAGIC_BW: 1010 case UFS2_MAGIC: 1011 case UFS_MAGIC_LFN: 1012 case UFS_MAGIC_FEA: 1013 case UFS_MAGIC_4GB: 1014 goto magic_found; 1015 } 1016 sbi->s_bytesex = BYTESEX_BE; 1017 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) { 1018 case UFS_MAGIC: 1019 case UFS_MAGIC_BW: 1020 case UFS2_MAGIC: 1021 case UFS_MAGIC_LFN: 1022 case UFS_MAGIC_FEA: 1023 case UFS_MAGIC_4GB: 1024 goto magic_found; 1025 } 1026 1027 if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP) 1028 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD) 1029 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP)) 1030 && uspi->s_sbbase < 256) { 1031 ubh_brelse_uspi(uspi); 1032 ubh = NULL; 1033 uspi->s_sbbase += 8; 1034 goto again; 1035 } 1036 if (!silent) 1037 printk("ufs_read_super: bad magic number\n"); 1038 goto failed; 1039 1040 magic_found: 1041 /* 1042 * Check block and fragment sizes 1043 */ 1044 uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize); 1045 uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize); 1046 uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize); 1047 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask); 1048 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift); 1049 1050 if (!is_power_of_2(uspi->s_fsize)) { 1051 printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n", 1052 uspi->s_fsize); 1053 goto failed; 1054 } 1055 if (uspi->s_fsize < 512) { 1056 printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n", 1057 uspi->s_fsize); 1058 goto failed; 1059 } 1060 if (uspi->s_fsize > 4096) { 1061 printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n", 1062 uspi->s_fsize); 1063 goto failed; 1064 } 1065 if (!is_power_of_2(uspi->s_bsize)) { 1066 printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n", 1067 uspi->s_bsize); 1068 goto failed; 1069 } 1070 if (uspi->s_bsize < 4096) { 1071 printk(KERN_ERR "ufs_read_super: block size %u is too small\n", 1072 uspi->s_bsize); 1073 goto failed; 1074 } 1075 if (uspi->s_bsize / uspi->s_fsize > 8) { 1076 printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n", 1077 uspi->s_bsize / uspi->s_fsize); 1078 goto failed; 1079 } 1080 if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) { 1081 ubh_brelse_uspi(uspi); 1082 ubh = NULL; 1083 block_size = uspi->s_fsize; 1084 super_block_size = uspi->s_sbsize; 1085 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size); 1086 goto again; 1087 } 1088 1089 sbi->s_flags = flags;/*after that line some functions use s_flags*/ 1090 ufs_print_super_stuff(sb, usb1, usb2, usb3); 1091 1092 /* 1093 * Check, if file system was correctly unmounted. 1094 * If not, make it read only. 1095 */ 1096 if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) || 1097 ((flags & UFS_ST_MASK) == UFS_ST_OLD) || 1098 (((flags & UFS_ST_MASK) == UFS_ST_SUN || 1099 (flags & UFS_ST_MASK) == UFS_ST_SUNOS || 1100 (flags & UFS_ST_MASK) == UFS_ST_SUNx86) && 1101 (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) { 1102 switch(usb1->fs_clean) { 1103 case UFS_FSCLEAN: 1104 UFSD("fs is clean\n"); 1105 break; 1106 case UFS_FSSTABLE: 1107 UFSD("fs is stable\n"); 1108 break; 1109 case UFS_FSLOG: 1110 UFSD("fs is logging fs\n"); 1111 break; 1112 case UFS_FSOSF1: 1113 UFSD("fs is DEC OSF/1\n"); 1114 break; 1115 case UFS_FSACTIVE: 1116 printk("ufs_read_super: fs is active\n"); 1117 sb->s_flags |= MS_RDONLY; 1118 break; 1119 case UFS_FSBAD: 1120 printk("ufs_read_super: fs is bad\n"); 1121 sb->s_flags |= MS_RDONLY; 1122 break; 1123 default: 1124 printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean); 1125 sb->s_flags |= MS_RDONLY; 1126 break; 1127 } 1128 } else { 1129 printk("ufs_read_super: fs needs fsck\n"); 1130 sb->s_flags |= MS_RDONLY; 1131 } 1132 1133 /* 1134 * Read ufs_super_block into internal data structures 1135 */ 1136 sb->s_op = &ufs_super_ops; 1137 sb->s_export_op = &ufs_export_ops; 1138 1139 sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic); 1140 1141 uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno); 1142 uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno); 1143 uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno); 1144 uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno); 1145 uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset); 1146 uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask); 1147 1148 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { 1149 uspi->s_u2_size = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size); 1150 uspi->s_u2_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize); 1151 } else { 1152 uspi->s_size = fs32_to_cpu(sb, usb1->fs_size); 1153 uspi->s_dsize = fs32_to_cpu(sb, usb1->fs_dsize); 1154 } 1155 1156 uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg); 1157 /* s_bsize already set */ 1158 /* s_fsize already set */ 1159 uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag); 1160 uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree); 1161 uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask); 1162 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask); 1163 uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift); 1164 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift); 1165 UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift, 1166 uspi->s_fshift); 1167 uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift); 1168 uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb); 1169 /* s_sbsize already set */ 1170 uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask); 1171 uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift); 1172 uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir); 1173 uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb); 1174 uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf); 1175 uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3); 1176 uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave); 1177 uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew); 1178 1179 if (uspi->fs_magic == UFS2_MAGIC) 1180 uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr); 1181 else 1182 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr); 1183 1184 uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize); 1185 uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize); 1186 uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak); 1187 uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect); 1188 uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc); 1189 uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg); 1190 uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg); 1191 uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc); 1192 uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize); 1193 uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3); 1194 uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3); 1195 uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos); 1196 uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff); 1197 uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff); 1198 1199 /* 1200 * Compute another frequently used values 1201 */ 1202 uspi->s_fpbmask = uspi->s_fpb - 1; 1203 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) 1204 uspi->s_apbshift = uspi->s_bshift - 3; 1205 else 1206 uspi->s_apbshift = uspi->s_bshift - 2; 1207 1208 uspi->s_2apbshift = uspi->s_apbshift * 2; 1209 uspi->s_3apbshift = uspi->s_apbshift * 3; 1210 uspi->s_apb = 1 << uspi->s_apbshift; 1211 uspi->s_2apb = 1 << uspi->s_2apbshift; 1212 uspi->s_3apb = 1 << uspi->s_3apbshift; 1213 uspi->s_apbmask = uspi->s_apb - 1; 1214 uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS; 1215 uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift; 1216 uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift; 1217 uspi->s_bpf = uspi->s_fsize << 3; 1218 uspi->s_bpfshift = uspi->s_fshift + 3; 1219 uspi->s_bpfmask = uspi->s_bpf - 1; 1220 if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_44BSD || 1221 (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_UFS2) 1222 uspi->s_maxsymlinklen = 1223 fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen); 1224 1225 if (uspi->fs_magic == UFS2_MAGIC) 1226 maxsymlen = 2 * 4 * (UFS_NDADDR + UFS_NINDIR); 1227 else 1228 maxsymlen = 4 * (UFS_NDADDR + UFS_NINDIR); 1229 if (uspi->s_maxsymlinklen > maxsymlen) { 1230 ufs_warning(sb, __func__, "ufs_read_super: excessive maximum " 1231 "fast symlink size (%u)\n", uspi->s_maxsymlinklen); 1232 uspi->s_maxsymlinklen = maxsymlen; 1233 } 1234 sb->s_max_links = UFS_LINK_MAX; 1235 1236 inode = ufs_iget(sb, UFS_ROOTINO); 1237 if (IS_ERR(inode)) { 1238 ret = PTR_ERR(inode); 1239 goto failed; 1240 } 1241 sb->s_root = d_make_root(inode); 1242 if (!sb->s_root) { 1243 ret = -ENOMEM; 1244 goto failed; 1245 } 1246 1247 ufs_setup_cstotal(sb); 1248 /* 1249 * Read cylinder group structures 1250 */ 1251 if (!(sb->s_flags & MS_RDONLY)) 1252 if (!ufs_read_cylinder_structures(sb)) 1253 goto failed; 1254 1255 UFSD("EXIT\n"); 1256 return 0; 1257 1258 failed: 1259 mutex_destroy(&sbi->mutex); 1260 if (ubh) 1261 ubh_brelse_uspi (uspi); 1262 kfree (uspi); 1263 kfree(sbi); 1264 sb->s_fs_info = NULL; 1265 UFSD("EXIT (FAILED)\n"); 1266 return ret; 1267 1268 failed_nomem: 1269 UFSD("EXIT (NOMEM)\n"); 1270 return -ENOMEM; 1271 } 1272 1273 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data) 1274 { 1275 struct ufs_sb_private_info * uspi; 1276 struct ufs_super_block_first * usb1; 1277 struct ufs_super_block_third * usb3; 1278 unsigned new_mount_opt, ufstype; 1279 unsigned flags; 1280 1281 sync_filesystem(sb); 1282 lock_ufs(sb); 1283 uspi = UFS_SB(sb)->s_uspi; 1284 flags = UFS_SB(sb)->s_flags; 1285 usb1 = ubh_get_usb_first(uspi); 1286 usb3 = ubh_get_usb_third(uspi); 1287 1288 /* 1289 * Allow the "check" option to be passed as a remount option. 1290 * It is not possible to change ufstype option during remount 1291 */ 1292 ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE; 1293 new_mount_opt = 0; 1294 ufs_set_opt (new_mount_opt, ONERROR_LOCK); 1295 if (!ufs_parse_options (data, &new_mount_opt)) { 1296 unlock_ufs(sb); 1297 return -EINVAL; 1298 } 1299 if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) { 1300 new_mount_opt |= ufstype; 1301 } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) { 1302 printk("ufstype can't be changed during remount\n"); 1303 unlock_ufs(sb); 1304 return -EINVAL; 1305 } 1306 1307 if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) { 1308 UFS_SB(sb)->s_mount_opt = new_mount_opt; 1309 unlock_ufs(sb); 1310 return 0; 1311 } 1312 1313 /* 1314 * fs was mouted as rw, remounting ro 1315 */ 1316 if (*mount_flags & MS_RDONLY) { 1317 ufs_put_super_internal(sb); 1318 usb1->fs_time = cpu_to_fs32(sb, get_seconds()); 1319 if ((flags & UFS_ST_MASK) == UFS_ST_SUN 1320 || (flags & UFS_ST_MASK) == UFS_ST_SUNOS 1321 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86) 1322 ufs_set_fs_state(sb, usb1, usb3, 1323 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time)); 1324 ubh_mark_buffer_dirty (USPI_UBH(uspi)); 1325 sb->s_flags |= MS_RDONLY; 1326 } else { 1327 /* 1328 * fs was mounted as ro, remounting rw 1329 */ 1330 #ifndef CONFIG_UFS_FS_WRITE 1331 printk("ufs was compiled with read-only support, " 1332 "can't be mounted as read-write\n"); 1333 unlock_ufs(sb); 1334 return -EINVAL; 1335 #else 1336 if (ufstype != UFS_MOUNT_UFSTYPE_SUN && 1337 ufstype != UFS_MOUNT_UFSTYPE_SUNOS && 1338 ufstype != UFS_MOUNT_UFSTYPE_44BSD && 1339 ufstype != UFS_MOUNT_UFSTYPE_SUNx86 && 1340 ufstype != UFS_MOUNT_UFSTYPE_UFS2) { 1341 printk("this ufstype is read-only supported\n"); 1342 unlock_ufs(sb); 1343 return -EINVAL; 1344 } 1345 if (!ufs_read_cylinder_structures(sb)) { 1346 printk("failed during remounting\n"); 1347 unlock_ufs(sb); 1348 return -EPERM; 1349 } 1350 sb->s_flags &= ~MS_RDONLY; 1351 #endif 1352 } 1353 UFS_SB(sb)->s_mount_opt = new_mount_opt; 1354 unlock_ufs(sb); 1355 return 0; 1356 } 1357 1358 static int ufs_show_options(struct seq_file *seq, struct dentry *root) 1359 { 1360 struct ufs_sb_info *sbi = UFS_SB(root->d_sb); 1361 unsigned mval = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE; 1362 const struct match_token *tp = tokens; 1363 1364 while (tp->token != Opt_onerror_panic && tp->token != mval) 1365 ++tp; 1366 BUG_ON(tp->token == Opt_onerror_panic); 1367 seq_printf(seq, ",%s", tp->pattern); 1368 1369 mval = sbi->s_mount_opt & UFS_MOUNT_ONERROR; 1370 while (tp->token != Opt_err && tp->token != mval) 1371 ++tp; 1372 BUG_ON(tp->token == Opt_err); 1373 seq_printf(seq, ",%s", tp->pattern); 1374 1375 return 0; 1376 } 1377 1378 static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf) 1379 { 1380 struct super_block *sb = dentry->d_sb; 1381 struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi; 1382 unsigned flags = UFS_SB(sb)->s_flags; 1383 struct ufs_super_block_third *usb3; 1384 u64 id = huge_encode_dev(sb->s_bdev->bd_dev); 1385 1386 lock_ufs(sb); 1387 1388 usb3 = ubh_get_usb_third(uspi); 1389 1390 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { 1391 buf->f_type = UFS2_MAGIC; 1392 buf->f_blocks = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize); 1393 } else { 1394 buf->f_type = UFS_MAGIC; 1395 buf->f_blocks = uspi->s_dsize; 1396 } 1397 buf->f_bfree = ufs_blkstofrags(uspi->cs_total.cs_nbfree) + 1398 uspi->cs_total.cs_nffree; 1399 buf->f_ffree = uspi->cs_total.cs_nifree; 1400 buf->f_bsize = sb->s_blocksize; 1401 buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree)) 1402 ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0; 1403 buf->f_files = uspi->s_ncg * uspi->s_ipg; 1404 buf->f_namelen = UFS_MAXNAMLEN; 1405 buf->f_fsid.val[0] = (u32)id; 1406 buf->f_fsid.val[1] = (u32)(id >> 32); 1407 1408 unlock_ufs(sb); 1409 1410 return 0; 1411 } 1412 1413 static struct kmem_cache * ufs_inode_cachep; 1414 1415 static struct inode *ufs_alloc_inode(struct super_block *sb) 1416 { 1417 struct ufs_inode_info *ei; 1418 ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, GFP_NOFS); 1419 if (!ei) 1420 return NULL; 1421 ei->vfs_inode.i_version = 1; 1422 return &ei->vfs_inode; 1423 } 1424 1425 static void ufs_i_callback(struct rcu_head *head) 1426 { 1427 struct inode *inode = container_of(head, struct inode, i_rcu); 1428 kmem_cache_free(ufs_inode_cachep, UFS_I(inode)); 1429 } 1430 1431 static void ufs_destroy_inode(struct inode *inode) 1432 { 1433 call_rcu(&inode->i_rcu, ufs_i_callback); 1434 } 1435 1436 static void init_once(void *foo) 1437 { 1438 struct ufs_inode_info *ei = (struct ufs_inode_info *) foo; 1439 1440 inode_init_once(&ei->vfs_inode); 1441 } 1442 1443 static int __init init_inodecache(void) 1444 { 1445 ufs_inode_cachep = kmem_cache_create("ufs_inode_cache", 1446 sizeof(struct ufs_inode_info), 1447 0, (SLAB_RECLAIM_ACCOUNT| 1448 SLAB_MEM_SPREAD), 1449 init_once); 1450 if (ufs_inode_cachep == NULL) 1451 return -ENOMEM; 1452 return 0; 1453 } 1454 1455 static void destroy_inodecache(void) 1456 { 1457 /* 1458 * Make sure all delayed rcu free inodes are flushed before we 1459 * destroy cache. 1460 */ 1461 rcu_barrier(); 1462 kmem_cache_destroy(ufs_inode_cachep); 1463 } 1464 1465 static const struct super_operations ufs_super_ops = { 1466 .alloc_inode = ufs_alloc_inode, 1467 .destroy_inode = ufs_destroy_inode, 1468 .write_inode = ufs_write_inode, 1469 .evict_inode = ufs_evict_inode, 1470 .put_super = ufs_put_super, 1471 .sync_fs = ufs_sync_fs, 1472 .statfs = ufs_statfs, 1473 .remount_fs = ufs_remount, 1474 .show_options = ufs_show_options, 1475 }; 1476 1477 static struct dentry *ufs_mount(struct file_system_type *fs_type, 1478 int flags, const char *dev_name, void *data) 1479 { 1480 return mount_bdev(fs_type, flags, dev_name, data, ufs_fill_super); 1481 } 1482 1483 static struct file_system_type ufs_fs_type = { 1484 .owner = THIS_MODULE, 1485 .name = "ufs", 1486 .mount = ufs_mount, 1487 .kill_sb = kill_block_super, 1488 .fs_flags = FS_REQUIRES_DEV, 1489 }; 1490 MODULE_ALIAS_FS("ufs"); 1491 1492 static int __init init_ufs_fs(void) 1493 { 1494 int err = init_inodecache(); 1495 if (err) 1496 goto out1; 1497 err = register_filesystem(&ufs_fs_type); 1498 if (err) 1499 goto out; 1500 return 0; 1501 out: 1502 destroy_inodecache(); 1503 out1: 1504 return err; 1505 } 1506 1507 static void __exit exit_ufs_fs(void) 1508 { 1509 unregister_filesystem(&ufs_fs_type); 1510 destroy_inodecache(); 1511 } 1512 1513 module_init(init_ufs_fs) 1514 module_exit(exit_ufs_fs) 1515 MODULE_LICENSE("GPL"); 1516