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