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/quotaops.h> 81 #include <linux/slab.h> 82 #include <linux/time.h> 83 #include <linux/stat.h> 84 #include <linux/string.h> 85 #include <linux/blkdev.h> 86 #include <linux/init.h> 87 #include <linux/parser.h> 88 #include <linux/smp_lock.h> 89 #include <linux/buffer_head.h> 90 #include <linux/vfs.h> 91 #include <linux/log2.h> 92 #include <linux/mount.h> 93 #include <linux/seq_file.h> 94 95 #include "ufs_fs.h" 96 #include "ufs.h" 97 #include "swab.h" 98 #include "util.h" 99 100 static struct inode *ufs_nfs_get_inode(struct super_block *sb, u64 ino, u32 generation) 101 { 102 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 103 struct inode *inode; 104 105 if (ino < UFS_ROOTINO || ino > uspi->s_ncg * uspi->s_ipg) 106 return ERR_PTR(-ESTALE); 107 108 inode = ufs_iget(sb, ino); 109 if (IS_ERR(inode)) 110 return ERR_CAST(inode); 111 if (generation && inode->i_generation != generation) { 112 iput(inode); 113 return ERR_PTR(-ESTALE); 114 } 115 return inode; 116 } 117 118 static struct dentry *ufs_fh_to_dentry(struct super_block *sb, struct fid *fid, 119 int fh_len, int fh_type) 120 { 121 return generic_fh_to_dentry(sb, fid, fh_len, fh_type, ufs_nfs_get_inode); 122 } 123 124 static struct dentry *ufs_fh_to_parent(struct super_block *sb, struct fid *fid, 125 int fh_len, int fh_type) 126 { 127 return generic_fh_to_parent(sb, fid, fh_len, fh_type, ufs_nfs_get_inode); 128 } 129 130 static struct dentry *ufs_get_parent(struct dentry *child) 131 { 132 struct qstr dot_dot = { 133 .name = "..", 134 .len = 2, 135 }; 136 ino_t ino; 137 138 ino = ufs_inode_by_name(child->d_inode, &dot_dot); 139 if (!ino) 140 return ERR_PTR(-ENOENT); 141 return d_obtain_alias(ufs_iget(child->d_inode->i_sb, ino)); 142 } 143 144 static const struct export_operations ufs_export_ops = { 145 .fh_to_dentry = ufs_fh_to_dentry, 146 .fh_to_parent = ufs_fh_to_parent, 147 .get_parent = ufs_get_parent, 148 }; 149 150 #ifdef CONFIG_UFS_DEBUG 151 /* 152 * Print contents of ufs_super_block, useful for debugging 153 */ 154 static void ufs_print_super_stuff(struct super_block *sb, 155 struct ufs_super_block_first *usb1, 156 struct ufs_super_block_second *usb2, 157 struct ufs_super_block_third *usb3) 158 { 159 u32 magic = fs32_to_cpu(sb, usb3->fs_magic); 160 161 printk("ufs_print_super_stuff\n"); 162 printk(" magic: 0x%x\n", magic); 163 if (fs32_to_cpu(sb, usb3->fs_magic) == UFS2_MAGIC) { 164 printk(" fs_size: %llu\n", (unsigned long long) 165 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size)); 166 printk(" fs_dsize: %llu\n", (unsigned long long) 167 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize)); 168 printk(" bsize: %u\n", 169 fs32_to_cpu(sb, usb1->fs_bsize)); 170 printk(" fsize: %u\n", 171 fs32_to_cpu(sb, usb1->fs_fsize)); 172 printk(" fs_volname: %s\n", usb2->fs_un.fs_u2.fs_volname); 173 printk(" fs_sblockloc: %llu\n", (unsigned long long) 174 fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc)); 175 printk(" cs_ndir(No of dirs): %llu\n", (unsigned long long) 176 fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir)); 177 printk(" cs_nbfree(No of free blocks): %llu\n", 178 (unsigned long long) 179 fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree)); 180 printk(KERN_INFO" cs_nifree(Num of free inodes): %llu\n", 181 (unsigned long long) 182 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree)); 183 printk(KERN_INFO" cs_nffree(Num of free frags): %llu\n", 184 (unsigned long long) 185 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree)); 186 printk(KERN_INFO" fs_maxsymlinklen: %u\n", 187 fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen)); 188 } else { 189 printk(" sblkno: %u\n", fs32_to_cpu(sb, usb1->fs_sblkno)); 190 printk(" cblkno: %u\n", fs32_to_cpu(sb, usb1->fs_cblkno)); 191 printk(" iblkno: %u\n", fs32_to_cpu(sb, usb1->fs_iblkno)); 192 printk(" dblkno: %u\n", fs32_to_cpu(sb, usb1->fs_dblkno)); 193 printk(" cgoffset: %u\n", 194 fs32_to_cpu(sb, usb1->fs_cgoffset)); 195 printk(" ~cgmask: 0x%x\n", 196 ~fs32_to_cpu(sb, usb1->fs_cgmask)); 197 printk(" size: %u\n", fs32_to_cpu(sb, usb1->fs_size)); 198 printk(" dsize: %u\n", fs32_to_cpu(sb, usb1->fs_dsize)); 199 printk(" ncg: %u\n", fs32_to_cpu(sb, usb1->fs_ncg)); 200 printk(" bsize: %u\n", fs32_to_cpu(sb, usb1->fs_bsize)); 201 printk(" fsize: %u\n", fs32_to_cpu(sb, usb1->fs_fsize)); 202 printk(" frag: %u\n", fs32_to_cpu(sb, usb1->fs_frag)); 203 printk(" fragshift: %u\n", 204 fs32_to_cpu(sb, usb1->fs_fragshift)); 205 printk(" ~fmask: %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask)); 206 printk(" fshift: %u\n", fs32_to_cpu(sb, usb1->fs_fshift)); 207 printk(" sbsize: %u\n", fs32_to_cpu(sb, usb1->fs_sbsize)); 208 printk(" spc: %u\n", fs32_to_cpu(sb, usb1->fs_spc)); 209 printk(" cpg: %u\n", fs32_to_cpu(sb, usb1->fs_cpg)); 210 printk(" ipg: %u\n", fs32_to_cpu(sb, usb1->fs_ipg)); 211 printk(" fpg: %u\n", fs32_to_cpu(sb, usb1->fs_fpg)); 212 printk(" csaddr: %u\n", fs32_to_cpu(sb, usb1->fs_csaddr)); 213 printk(" cssize: %u\n", fs32_to_cpu(sb, usb1->fs_cssize)); 214 printk(" cgsize: %u\n", fs32_to_cpu(sb, usb1->fs_cgsize)); 215 printk(" fstodb: %u\n", 216 fs32_to_cpu(sb, usb1->fs_fsbtodb)); 217 printk(" nrpos: %u\n", fs32_to_cpu(sb, usb3->fs_nrpos)); 218 printk(" ndir %u\n", 219 fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir)); 220 printk(" nifree %u\n", 221 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree)); 222 printk(" nbfree %u\n", 223 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree)); 224 printk(" nffree %u\n", 225 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree)); 226 } 227 printk("\n"); 228 } 229 230 /* 231 * Print contents of ufs_cylinder_group, useful for debugging 232 */ 233 static void ufs_print_cylinder_stuff(struct super_block *sb, 234 struct ufs_cylinder_group *cg) 235 { 236 printk("\nufs_print_cylinder_stuff\n"); 237 printk("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group)); 238 printk(" magic: %x\n", fs32_to_cpu(sb, cg->cg_magic)); 239 printk(" time: %u\n", fs32_to_cpu(sb, cg->cg_time)); 240 printk(" cgx: %u\n", fs32_to_cpu(sb, cg->cg_cgx)); 241 printk(" ncyl: %u\n", fs16_to_cpu(sb, cg->cg_ncyl)); 242 printk(" niblk: %u\n", fs16_to_cpu(sb, cg->cg_niblk)); 243 printk(" ndblk: %u\n", fs32_to_cpu(sb, cg->cg_ndblk)); 244 printk(" cs_ndir: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir)); 245 printk(" cs_nbfree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree)); 246 printk(" cs_nifree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree)); 247 printk(" cs_nffree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree)); 248 printk(" rotor: %u\n", fs32_to_cpu(sb, cg->cg_rotor)); 249 printk(" frotor: %u\n", fs32_to_cpu(sb, cg->cg_frotor)); 250 printk(" irotor: %u\n", fs32_to_cpu(sb, cg->cg_irotor)); 251 printk(" frsum: %u, %u, %u, %u, %u, %u, %u, %u\n", 252 fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]), 253 fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]), 254 fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]), 255 fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7])); 256 printk(" btotoff: %u\n", fs32_to_cpu(sb, cg->cg_btotoff)); 257 printk(" boff: %u\n", fs32_to_cpu(sb, cg->cg_boff)); 258 printk(" iuseoff: %u\n", fs32_to_cpu(sb, cg->cg_iusedoff)); 259 printk(" freeoff: %u\n", fs32_to_cpu(sb, cg->cg_freeoff)); 260 printk(" nextfreeoff: %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff)); 261 printk(" clustersumoff %u\n", 262 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff)); 263 printk(" clusteroff %u\n", 264 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff)); 265 printk(" nclusterblks %u\n", 266 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks)); 267 printk("\n"); 268 } 269 #else 270 # define ufs_print_super_stuff(sb, usb1, usb2, usb3) /**/ 271 # define ufs_print_cylinder_stuff(sb, cg) /**/ 272 #endif /* CONFIG_UFS_DEBUG */ 273 274 static const struct super_operations ufs_super_ops; 275 276 static char error_buf[1024]; 277 278 void ufs_error (struct super_block * sb, const char * function, 279 const char * fmt, ...) 280 { 281 struct ufs_sb_private_info * uspi; 282 struct ufs_super_block_first * usb1; 283 va_list args; 284 285 uspi = UFS_SB(sb)->s_uspi; 286 usb1 = ubh_get_usb_first(uspi); 287 288 if (!(sb->s_flags & MS_RDONLY)) { 289 usb1->fs_clean = UFS_FSBAD; 290 ubh_mark_buffer_dirty(USPI_UBH(uspi)); 291 sb->s_dirt = 1; 292 sb->s_flags |= MS_RDONLY; 293 } 294 va_start (args, fmt); 295 vsnprintf (error_buf, sizeof(error_buf), fmt, args); 296 va_end (args); 297 switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) { 298 case UFS_MOUNT_ONERROR_PANIC: 299 panic ("UFS-fs panic (device %s): %s: %s\n", 300 sb->s_id, function, error_buf); 301 302 case UFS_MOUNT_ONERROR_LOCK: 303 case UFS_MOUNT_ONERROR_UMOUNT: 304 case UFS_MOUNT_ONERROR_REPAIR: 305 printk (KERN_CRIT "UFS-fs error (device %s): %s: %s\n", 306 sb->s_id, function, error_buf); 307 } 308 } 309 310 void ufs_panic (struct super_block * sb, const char * function, 311 const char * fmt, ...) 312 { 313 struct ufs_sb_private_info * uspi; 314 struct ufs_super_block_first * usb1; 315 va_list args; 316 317 lock_kernel(); 318 uspi = UFS_SB(sb)->s_uspi; 319 usb1 = ubh_get_usb_first(uspi); 320 321 if (!(sb->s_flags & MS_RDONLY)) { 322 usb1->fs_clean = UFS_FSBAD; 323 ubh_mark_buffer_dirty(USPI_UBH(uspi)); 324 sb->s_dirt = 1; 325 } 326 va_start (args, fmt); 327 vsnprintf (error_buf, sizeof(error_buf), fmt, args); 328 va_end (args); 329 sb->s_flags |= MS_RDONLY; 330 printk (KERN_CRIT "UFS-fs panic (device %s): %s: %s\n", 331 sb->s_id, function, error_buf); 332 } 333 334 void ufs_warning (struct super_block * sb, const char * function, 335 const char * fmt, ...) 336 { 337 va_list args; 338 339 va_start (args, fmt); 340 vsnprintf (error_buf, sizeof(error_buf), fmt, args); 341 va_end (args); 342 printk (KERN_WARNING "UFS-fs warning (device %s): %s: %s\n", 343 sb->s_id, function, error_buf); 344 } 345 346 enum { 347 Opt_type_old = UFS_MOUNT_UFSTYPE_OLD, 348 Opt_type_sunx86 = UFS_MOUNT_UFSTYPE_SUNx86, 349 Opt_type_sun = UFS_MOUNT_UFSTYPE_SUN, 350 Opt_type_sunos = UFS_MOUNT_UFSTYPE_SUNOS, 351 Opt_type_44bsd = UFS_MOUNT_UFSTYPE_44BSD, 352 Opt_type_ufs2 = UFS_MOUNT_UFSTYPE_UFS2, 353 Opt_type_hp = UFS_MOUNT_UFSTYPE_HP, 354 Opt_type_nextstepcd = UFS_MOUNT_UFSTYPE_NEXTSTEP_CD, 355 Opt_type_nextstep = UFS_MOUNT_UFSTYPE_NEXTSTEP, 356 Opt_type_openstep = UFS_MOUNT_UFSTYPE_OPENSTEP, 357 Opt_onerror_panic = UFS_MOUNT_ONERROR_PANIC, 358 Opt_onerror_lock = UFS_MOUNT_ONERROR_LOCK, 359 Opt_onerror_umount = UFS_MOUNT_ONERROR_UMOUNT, 360 Opt_onerror_repair = UFS_MOUNT_ONERROR_REPAIR, 361 Opt_err 362 }; 363 364 static const match_table_t tokens = { 365 {Opt_type_old, "ufstype=old"}, 366 {Opt_type_sunx86, "ufstype=sunx86"}, 367 {Opt_type_sun, "ufstype=sun"}, 368 {Opt_type_sunos, "ufstype=sunos"}, 369 {Opt_type_44bsd, "ufstype=44bsd"}, 370 {Opt_type_ufs2, "ufstype=ufs2"}, 371 {Opt_type_ufs2, "ufstype=5xbsd"}, 372 {Opt_type_hp, "ufstype=hp"}, 373 {Opt_type_nextstepcd, "ufstype=nextstep-cd"}, 374 {Opt_type_nextstep, "ufstype=nextstep"}, 375 {Opt_type_openstep, "ufstype=openstep"}, 376 /*end of possible ufs types */ 377 {Opt_onerror_panic, "onerror=panic"}, 378 {Opt_onerror_lock, "onerror=lock"}, 379 {Opt_onerror_umount, "onerror=umount"}, 380 {Opt_onerror_repair, "onerror=repair"}, 381 {Opt_err, NULL} 382 }; 383 384 static int ufs_parse_options (char * options, unsigned * mount_options) 385 { 386 char * p; 387 388 UFSD("ENTER\n"); 389 390 if (!options) 391 return 1; 392 393 while ((p = strsep(&options, ",")) != NULL) { 394 substring_t args[MAX_OPT_ARGS]; 395 int token; 396 if (!*p) 397 continue; 398 399 token = match_token(p, tokens, args); 400 switch (token) { 401 case Opt_type_old: 402 ufs_clear_opt (*mount_options, UFSTYPE); 403 ufs_set_opt (*mount_options, UFSTYPE_OLD); 404 break; 405 case Opt_type_sunx86: 406 ufs_clear_opt (*mount_options, UFSTYPE); 407 ufs_set_opt (*mount_options, UFSTYPE_SUNx86); 408 break; 409 case Opt_type_sun: 410 ufs_clear_opt (*mount_options, UFSTYPE); 411 ufs_set_opt (*mount_options, UFSTYPE_SUN); 412 break; 413 case Opt_type_sunos: 414 ufs_clear_opt(*mount_options, UFSTYPE); 415 ufs_set_opt(*mount_options, UFSTYPE_SUNOS); 416 break; 417 case Opt_type_44bsd: 418 ufs_clear_opt (*mount_options, UFSTYPE); 419 ufs_set_opt (*mount_options, UFSTYPE_44BSD); 420 break; 421 case Opt_type_ufs2: 422 ufs_clear_opt(*mount_options, UFSTYPE); 423 ufs_set_opt(*mount_options, UFSTYPE_UFS2); 424 break; 425 case Opt_type_hp: 426 ufs_clear_opt (*mount_options, UFSTYPE); 427 ufs_set_opt (*mount_options, UFSTYPE_HP); 428 break; 429 case Opt_type_nextstepcd: 430 ufs_clear_opt (*mount_options, UFSTYPE); 431 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD); 432 break; 433 case Opt_type_nextstep: 434 ufs_clear_opt (*mount_options, UFSTYPE); 435 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP); 436 break; 437 case Opt_type_openstep: 438 ufs_clear_opt (*mount_options, UFSTYPE); 439 ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP); 440 break; 441 case Opt_onerror_panic: 442 ufs_clear_opt (*mount_options, ONERROR); 443 ufs_set_opt (*mount_options, ONERROR_PANIC); 444 break; 445 case Opt_onerror_lock: 446 ufs_clear_opt (*mount_options, ONERROR); 447 ufs_set_opt (*mount_options, ONERROR_LOCK); 448 break; 449 case Opt_onerror_umount: 450 ufs_clear_opt (*mount_options, ONERROR); 451 ufs_set_opt (*mount_options, ONERROR_UMOUNT); 452 break; 453 case Opt_onerror_repair: 454 printk("UFS-fs: Unable to do repair on error, " 455 "will lock lock instead\n"); 456 ufs_clear_opt (*mount_options, ONERROR); 457 ufs_set_opt (*mount_options, ONERROR_REPAIR); 458 break; 459 default: 460 printk("UFS-fs: Invalid option: \"%s\" " 461 "or missing value\n", p); 462 return 0; 463 } 464 } 465 return 1; 466 } 467 468 /* 469 * Diffrent types of UFS hold fs_cstotal in different 470 * places, and use diffrent data structure for it. 471 * To make things simplier we just copy fs_cstotal to ufs_sb_private_info 472 */ 473 static void ufs_setup_cstotal(struct super_block *sb) 474 { 475 struct ufs_sb_info *sbi = UFS_SB(sb); 476 struct ufs_sb_private_info *uspi = sbi->s_uspi; 477 struct ufs_super_block_first *usb1; 478 struct ufs_super_block_second *usb2; 479 struct ufs_super_block_third *usb3; 480 unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE; 481 482 UFSD("ENTER, mtype=%u\n", mtype); 483 usb1 = ubh_get_usb_first(uspi); 484 usb2 = ubh_get_usb_second(uspi); 485 usb3 = ubh_get_usb_third(uspi); 486 487 if ((mtype == UFS_MOUNT_UFSTYPE_44BSD && 488 (usb1->fs_flags & UFS_FLAGS_UPDATED)) || 489 mtype == UFS_MOUNT_UFSTYPE_UFS2) { 490 /*we have statistic in different place, then usual*/ 491 uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir); 492 uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree); 493 uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree); 494 uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree); 495 } else { 496 uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir); 497 uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree); 498 uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree); 499 uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree); 500 } 501 UFSD("EXIT\n"); 502 } 503 504 /* 505 * Read on-disk structures associated with cylinder groups 506 */ 507 static int ufs_read_cylinder_structures(struct super_block *sb) 508 { 509 struct ufs_sb_info *sbi = UFS_SB(sb); 510 struct ufs_sb_private_info *uspi = sbi->s_uspi; 511 struct ufs_buffer_head * ubh; 512 unsigned char * base, * space; 513 unsigned size, blks, i; 514 struct ufs_super_block_third *usb3; 515 516 UFSD("ENTER\n"); 517 518 usb3 = ubh_get_usb_third(uspi); 519 /* 520 * Read cs structures from (usually) first data block 521 * on the device. 522 */ 523 size = uspi->s_cssize; 524 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift; 525 base = space = kmalloc(size, GFP_KERNEL); 526 if (!base) 527 goto failed; 528 sbi->s_csp = (struct ufs_csum *)space; 529 for (i = 0; i < blks; i += uspi->s_fpb) { 530 size = uspi->s_bsize; 531 if (i + uspi->s_fpb > blks) 532 size = (blks - i) * uspi->s_fsize; 533 534 ubh = ubh_bread(sb, uspi->s_csaddr + i, size); 535 536 if (!ubh) 537 goto failed; 538 539 ubh_ubhcpymem (space, ubh, size); 540 541 space += size; 542 ubh_brelse (ubh); 543 ubh = NULL; 544 } 545 546 /* 547 * Read cylinder group (we read only first fragment from block 548 * at this time) and prepare internal data structures for cg caching. 549 */ 550 if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_KERNEL))) 551 goto failed; 552 for (i = 0; i < uspi->s_ncg; i++) 553 sbi->s_ucg[i] = NULL; 554 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) { 555 sbi->s_ucpi[i] = NULL; 556 sbi->s_cgno[i] = UFS_CGNO_EMPTY; 557 } 558 for (i = 0; i < uspi->s_ncg; i++) { 559 UFSD("read cg %u\n", i); 560 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i)))) 561 goto failed; 562 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data)) 563 goto failed; 564 565 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data); 566 } 567 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) { 568 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_KERNEL))) 569 goto failed; 570 sbi->s_cgno[i] = UFS_CGNO_EMPTY; 571 } 572 sbi->s_cg_loaded = 0; 573 UFSD("EXIT\n"); 574 return 1; 575 576 failed: 577 kfree (base); 578 if (sbi->s_ucg) { 579 for (i = 0; i < uspi->s_ncg; i++) 580 if (sbi->s_ucg[i]) 581 brelse (sbi->s_ucg[i]); 582 kfree (sbi->s_ucg); 583 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) 584 kfree (sbi->s_ucpi[i]); 585 } 586 UFSD("EXIT (FAILED)\n"); 587 return 0; 588 } 589 590 /* 591 * Sync our internal copy of fs_cstotal with disk 592 */ 593 static void ufs_put_cstotal(struct super_block *sb) 594 { 595 unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE; 596 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 597 struct ufs_super_block_first *usb1; 598 struct ufs_super_block_second *usb2; 599 struct ufs_super_block_third *usb3; 600 601 UFSD("ENTER\n"); 602 usb1 = ubh_get_usb_first(uspi); 603 usb2 = ubh_get_usb_second(uspi); 604 usb3 = ubh_get_usb_third(uspi); 605 606 if ((mtype == UFS_MOUNT_UFSTYPE_44BSD && 607 (usb1->fs_flags & UFS_FLAGS_UPDATED)) || 608 mtype == UFS_MOUNT_UFSTYPE_UFS2) { 609 /*we have statistic in different place, then usual*/ 610 usb2->fs_un.fs_u2.cs_ndir = 611 cpu_to_fs64(sb, uspi->cs_total.cs_ndir); 612 usb2->fs_un.fs_u2.cs_nbfree = 613 cpu_to_fs64(sb, uspi->cs_total.cs_nbfree); 614 usb3->fs_un1.fs_u2.cs_nifree = 615 cpu_to_fs64(sb, uspi->cs_total.cs_nifree); 616 usb3->fs_un1.fs_u2.cs_nffree = 617 cpu_to_fs64(sb, uspi->cs_total.cs_nffree); 618 } else { 619 usb1->fs_cstotal.cs_ndir = 620 cpu_to_fs32(sb, uspi->cs_total.cs_ndir); 621 usb1->fs_cstotal.cs_nbfree = 622 cpu_to_fs32(sb, uspi->cs_total.cs_nbfree); 623 usb1->fs_cstotal.cs_nifree = 624 cpu_to_fs32(sb, uspi->cs_total.cs_nifree); 625 usb1->fs_cstotal.cs_nffree = 626 cpu_to_fs32(sb, uspi->cs_total.cs_nffree); 627 } 628 ubh_mark_buffer_dirty(USPI_UBH(uspi)); 629 ufs_print_super_stuff(sb, usb1, usb2, usb3); 630 UFSD("EXIT\n"); 631 } 632 633 /** 634 * ufs_put_super_internal() - put on-disk intrenal structures 635 * @sb: pointer to super_block structure 636 * Put on-disk structures associated with cylinder groups 637 * and write them back to disk, also update cs_total on disk 638 */ 639 static void ufs_put_super_internal(struct super_block *sb) 640 { 641 struct ufs_sb_info *sbi = UFS_SB(sb); 642 struct ufs_sb_private_info *uspi = sbi->s_uspi; 643 struct ufs_buffer_head * ubh; 644 unsigned char * base, * space; 645 unsigned blks, size, i; 646 647 648 UFSD("ENTER\n"); 649 650 lock_kernel(); 651 652 ufs_put_cstotal(sb); 653 size = uspi->s_cssize; 654 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift; 655 base = space = (char*) sbi->s_csp; 656 for (i = 0; i < blks; i += uspi->s_fpb) { 657 size = uspi->s_bsize; 658 if (i + uspi->s_fpb > blks) 659 size = (blks - i) * uspi->s_fsize; 660 661 ubh = ubh_bread(sb, uspi->s_csaddr + i, size); 662 663 ubh_memcpyubh (ubh, space, size); 664 space += size; 665 ubh_mark_buffer_uptodate (ubh, 1); 666 ubh_mark_buffer_dirty (ubh); 667 ubh_brelse (ubh); 668 } 669 for (i = 0; i < sbi->s_cg_loaded; i++) { 670 ufs_put_cylinder (sb, i); 671 kfree (sbi->s_ucpi[i]); 672 } 673 for (; i < UFS_MAX_GROUP_LOADED; i++) 674 kfree (sbi->s_ucpi[i]); 675 for (i = 0; i < uspi->s_ncg; i++) 676 brelse (sbi->s_ucg[i]); 677 kfree (sbi->s_ucg); 678 kfree (base); 679 680 unlock_kernel(); 681 682 UFSD("EXIT\n"); 683 } 684 685 static int ufs_fill_super(struct super_block *sb, void *data, int silent) 686 { 687 struct ufs_sb_info * sbi; 688 struct ufs_sb_private_info * uspi; 689 struct ufs_super_block_first * usb1; 690 struct ufs_super_block_second * usb2; 691 struct ufs_super_block_third * usb3; 692 struct ufs_buffer_head * ubh; 693 struct inode *inode; 694 unsigned block_size, super_block_size; 695 unsigned flags; 696 unsigned super_block_offset; 697 unsigned maxsymlen; 698 int ret = -EINVAL; 699 700 uspi = NULL; 701 ubh = NULL; 702 flags = 0; 703 704 UFSD("ENTER\n"); 705 706 sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL); 707 if (!sbi) 708 goto failed_nomem; 709 sb->s_fs_info = sbi; 710 711 UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY)); 712 713 #ifndef CONFIG_UFS_FS_WRITE 714 if (!(sb->s_flags & MS_RDONLY)) { 715 printk("ufs was compiled with read-only support, " 716 "can't be mounted as read-write\n"); 717 goto failed; 718 } 719 #endif 720 /* 721 * Set default mount options 722 * Parse mount options 723 */ 724 sbi->s_mount_opt = 0; 725 ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK); 726 if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) { 727 printk("wrong mount options\n"); 728 goto failed; 729 } 730 if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) { 731 if (!silent) 732 printk("You didn't specify the type of your ufs filesystem\n\n" 733 "mount -t ufs -o ufstype=" 734 "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n" 735 ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, " 736 "default is ufstype=old\n"); 737 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD); 738 } 739 740 uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL); 741 sbi->s_uspi = uspi; 742 if (!uspi) 743 goto failed; 744 uspi->s_dirblksize = UFS_SECTOR_SIZE; 745 super_block_offset=UFS_SBLOCK; 746 747 /* Keep 2Gig file limit. Some UFS variants need to override 748 this but as I don't know which I'll let those in the know loosen 749 the rules */ 750 switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) { 751 case UFS_MOUNT_UFSTYPE_44BSD: 752 UFSD("ufstype=44bsd\n"); 753 uspi->s_fsize = block_size = 512; 754 uspi->s_fmask = ~(512 - 1); 755 uspi->s_fshift = 9; 756 uspi->s_sbsize = super_block_size = 1536; 757 uspi->s_sbbase = 0; 758 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; 759 break; 760 case UFS_MOUNT_UFSTYPE_UFS2: 761 UFSD("ufstype=ufs2\n"); 762 super_block_offset=SBLOCK_UFS2; 763 uspi->s_fsize = block_size = 512; 764 uspi->s_fmask = ~(512 - 1); 765 uspi->s_fshift = 9; 766 uspi->s_sbsize = super_block_size = 1536; 767 uspi->s_sbbase = 0; 768 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; 769 break; 770 771 case UFS_MOUNT_UFSTYPE_SUN: 772 UFSD("ufstype=sun\n"); 773 uspi->s_fsize = block_size = 1024; 774 uspi->s_fmask = ~(1024 - 1); 775 uspi->s_fshift = 10; 776 uspi->s_sbsize = super_block_size = 2048; 777 uspi->s_sbbase = 0; 778 uspi->s_maxsymlinklen = 0; /* Not supported on disk */ 779 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN; 780 break; 781 782 case UFS_MOUNT_UFSTYPE_SUNOS: 783 UFSD(("ufstype=sunos\n")) 784 uspi->s_fsize = block_size = 1024; 785 uspi->s_fmask = ~(1024 - 1); 786 uspi->s_fshift = 10; 787 uspi->s_sbsize = 2048; 788 super_block_size = 2048; 789 uspi->s_sbbase = 0; 790 uspi->s_maxsymlinklen = 0; /* Not supported on disk */ 791 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_SUNOS | UFS_CG_SUN; 792 break; 793 794 case UFS_MOUNT_UFSTYPE_SUNx86: 795 UFSD("ufstype=sunx86\n"); 796 uspi->s_fsize = block_size = 1024; 797 uspi->s_fmask = ~(1024 - 1); 798 uspi->s_fshift = 10; 799 uspi->s_sbsize = super_block_size = 2048; 800 uspi->s_sbbase = 0; 801 uspi->s_maxsymlinklen = 0; /* Not supported on disk */ 802 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN; 803 break; 804 805 case UFS_MOUNT_UFSTYPE_OLD: 806 UFSD("ufstype=old\n"); 807 uspi->s_fsize = block_size = 1024; 808 uspi->s_fmask = ~(1024 - 1); 809 uspi->s_fshift = 10; 810 uspi->s_sbsize = super_block_size = 2048; 811 uspi->s_sbbase = 0; 812 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 813 if (!(sb->s_flags & MS_RDONLY)) { 814 if (!silent) 815 printk(KERN_INFO "ufstype=old is supported read-only\n"); 816 sb->s_flags |= MS_RDONLY; 817 } 818 break; 819 820 case UFS_MOUNT_UFSTYPE_NEXTSTEP: 821 UFSD("ufstype=nextstep\n"); 822 uspi->s_fsize = block_size = 1024; 823 uspi->s_fmask = ~(1024 - 1); 824 uspi->s_fshift = 10; 825 uspi->s_sbsize = super_block_size = 2048; 826 uspi->s_sbbase = 0; 827 uspi->s_dirblksize = 1024; 828 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 829 if (!(sb->s_flags & MS_RDONLY)) { 830 if (!silent) 831 printk(KERN_INFO "ufstype=nextstep is supported read-only\n"); 832 sb->s_flags |= MS_RDONLY; 833 } 834 break; 835 836 case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD: 837 UFSD("ufstype=nextstep-cd\n"); 838 uspi->s_fsize = block_size = 2048; 839 uspi->s_fmask = ~(2048 - 1); 840 uspi->s_fshift = 11; 841 uspi->s_sbsize = super_block_size = 2048; 842 uspi->s_sbbase = 0; 843 uspi->s_dirblksize = 1024; 844 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 845 if (!(sb->s_flags & MS_RDONLY)) { 846 if (!silent) 847 printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n"); 848 sb->s_flags |= MS_RDONLY; 849 } 850 break; 851 852 case UFS_MOUNT_UFSTYPE_OPENSTEP: 853 UFSD("ufstype=openstep\n"); 854 uspi->s_fsize = block_size = 1024; 855 uspi->s_fmask = ~(1024 - 1); 856 uspi->s_fshift = 10; 857 uspi->s_sbsize = super_block_size = 2048; 858 uspi->s_sbbase = 0; 859 uspi->s_dirblksize = 1024; 860 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; 861 if (!(sb->s_flags & MS_RDONLY)) { 862 if (!silent) 863 printk(KERN_INFO "ufstype=openstep is supported read-only\n"); 864 sb->s_flags |= MS_RDONLY; 865 } 866 break; 867 868 case UFS_MOUNT_UFSTYPE_HP: 869 UFSD("ufstype=hp\n"); 870 uspi->s_fsize = block_size = 1024; 871 uspi->s_fmask = ~(1024 - 1); 872 uspi->s_fshift = 10; 873 uspi->s_sbsize = super_block_size = 2048; 874 uspi->s_sbbase = 0; 875 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 876 if (!(sb->s_flags & MS_RDONLY)) { 877 if (!silent) 878 printk(KERN_INFO "ufstype=hp is supported read-only\n"); 879 sb->s_flags |= MS_RDONLY; 880 } 881 break; 882 default: 883 if (!silent) 884 printk("unknown ufstype\n"); 885 goto failed; 886 } 887 888 again: 889 if (!sb_set_blocksize(sb, block_size)) { 890 printk(KERN_ERR "UFS: failed to set blocksize\n"); 891 goto failed; 892 } 893 894 /* 895 * read ufs super block from device 896 */ 897 898 ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size); 899 900 if (!ubh) 901 goto failed; 902 903 usb1 = ubh_get_usb_first(uspi); 904 usb2 = ubh_get_usb_second(uspi); 905 usb3 = ubh_get_usb_third(uspi); 906 907 /* Sort out mod used on SunOS 4.1.3 for fs_state */ 908 uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat); 909 if (((flags & UFS_ST_MASK) == UFS_ST_SUNOS) && 910 (uspi->s_postblformat != UFS_42POSTBLFMT)) { 911 flags &= ~UFS_ST_MASK; 912 flags |= UFS_ST_SUN; 913 } 914 915 /* 916 * Check ufs magic number 917 */ 918 sbi->s_bytesex = BYTESEX_LE; 919 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) { 920 case UFS_MAGIC: 921 case UFS2_MAGIC: 922 case UFS_MAGIC_LFN: 923 case UFS_MAGIC_FEA: 924 case UFS_MAGIC_4GB: 925 goto magic_found; 926 } 927 sbi->s_bytesex = BYTESEX_BE; 928 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) { 929 case UFS_MAGIC: 930 case UFS2_MAGIC: 931 case UFS_MAGIC_LFN: 932 case UFS_MAGIC_FEA: 933 case UFS_MAGIC_4GB: 934 goto magic_found; 935 } 936 937 if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP) 938 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD) 939 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP)) 940 && uspi->s_sbbase < 256) { 941 ubh_brelse_uspi(uspi); 942 ubh = NULL; 943 uspi->s_sbbase += 8; 944 goto again; 945 } 946 if (!silent) 947 printk("ufs_read_super: bad magic number\n"); 948 goto failed; 949 950 magic_found: 951 /* 952 * Check block and fragment sizes 953 */ 954 uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize); 955 uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize); 956 uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize); 957 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask); 958 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift); 959 960 if (!is_power_of_2(uspi->s_fsize)) { 961 printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n", 962 uspi->s_fsize); 963 goto failed; 964 } 965 if (uspi->s_fsize < 512) { 966 printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n", 967 uspi->s_fsize); 968 goto failed; 969 } 970 if (uspi->s_fsize > 4096) { 971 printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n", 972 uspi->s_fsize); 973 goto failed; 974 } 975 if (!is_power_of_2(uspi->s_bsize)) { 976 printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n", 977 uspi->s_bsize); 978 goto failed; 979 } 980 if (uspi->s_bsize < 4096) { 981 printk(KERN_ERR "ufs_read_super: block size %u is too small\n", 982 uspi->s_bsize); 983 goto failed; 984 } 985 if (uspi->s_bsize / uspi->s_fsize > 8) { 986 printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n", 987 uspi->s_bsize / uspi->s_fsize); 988 goto failed; 989 } 990 if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) { 991 ubh_brelse_uspi(uspi); 992 ubh = NULL; 993 block_size = uspi->s_fsize; 994 super_block_size = uspi->s_sbsize; 995 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size); 996 goto again; 997 } 998 999 sbi->s_flags = flags;/*after that line some functions use s_flags*/ 1000 ufs_print_super_stuff(sb, usb1, usb2, usb3); 1001 1002 /* 1003 * Check, if file system was correctly unmounted. 1004 * If not, make it read only. 1005 */ 1006 if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) || 1007 ((flags & UFS_ST_MASK) == UFS_ST_OLD) || 1008 (((flags & UFS_ST_MASK) == UFS_ST_SUN || 1009 (flags & UFS_ST_MASK) == UFS_ST_SUNOS || 1010 (flags & UFS_ST_MASK) == UFS_ST_SUNx86) && 1011 (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) { 1012 switch(usb1->fs_clean) { 1013 case UFS_FSCLEAN: 1014 UFSD("fs is clean\n"); 1015 break; 1016 case UFS_FSSTABLE: 1017 UFSD("fs is stable\n"); 1018 break; 1019 case UFS_FSOSF1: 1020 UFSD("fs is DEC OSF/1\n"); 1021 break; 1022 case UFS_FSACTIVE: 1023 printk("ufs_read_super: fs is active\n"); 1024 sb->s_flags |= MS_RDONLY; 1025 break; 1026 case UFS_FSBAD: 1027 printk("ufs_read_super: fs is bad\n"); 1028 sb->s_flags |= MS_RDONLY; 1029 break; 1030 default: 1031 printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean); 1032 sb->s_flags |= MS_RDONLY; 1033 break; 1034 } 1035 } else { 1036 printk("ufs_read_super: fs needs fsck\n"); 1037 sb->s_flags |= MS_RDONLY; 1038 } 1039 1040 /* 1041 * Read ufs_super_block into internal data structures 1042 */ 1043 sb->s_op = &ufs_super_ops; 1044 sb->s_export_op = &ufs_export_ops; 1045 sb->dq_op = NULL; /***/ 1046 sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic); 1047 1048 uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno); 1049 uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno); 1050 uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno); 1051 uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno); 1052 uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset); 1053 uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask); 1054 1055 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { 1056 uspi->s_u2_size = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size); 1057 uspi->s_u2_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize); 1058 } else { 1059 uspi->s_size = fs32_to_cpu(sb, usb1->fs_size); 1060 uspi->s_dsize = fs32_to_cpu(sb, usb1->fs_dsize); 1061 } 1062 1063 uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg); 1064 /* s_bsize already set */ 1065 /* s_fsize already set */ 1066 uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag); 1067 uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree); 1068 uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask); 1069 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask); 1070 uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift); 1071 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift); 1072 UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift, 1073 uspi->s_fshift); 1074 uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift); 1075 uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb); 1076 /* s_sbsize already set */ 1077 uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask); 1078 uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift); 1079 uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir); 1080 uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb); 1081 uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf); 1082 uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3); 1083 uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave); 1084 uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew); 1085 1086 if (uspi->fs_magic == UFS2_MAGIC) 1087 uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr); 1088 else 1089 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr); 1090 1091 uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize); 1092 uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize); 1093 uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak); 1094 uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect); 1095 uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc); 1096 uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg); 1097 uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg); 1098 uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc); 1099 uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize); 1100 uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3); 1101 uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3); 1102 uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos); 1103 uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff); 1104 uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff); 1105 1106 /* 1107 * Compute another frequently used values 1108 */ 1109 uspi->s_fpbmask = uspi->s_fpb - 1; 1110 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) 1111 uspi->s_apbshift = uspi->s_bshift - 3; 1112 else 1113 uspi->s_apbshift = uspi->s_bshift - 2; 1114 1115 uspi->s_2apbshift = uspi->s_apbshift * 2; 1116 uspi->s_3apbshift = uspi->s_apbshift * 3; 1117 uspi->s_apb = 1 << uspi->s_apbshift; 1118 uspi->s_2apb = 1 << uspi->s_2apbshift; 1119 uspi->s_3apb = 1 << uspi->s_3apbshift; 1120 uspi->s_apbmask = uspi->s_apb - 1; 1121 uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS; 1122 uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift; 1123 uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift; 1124 uspi->s_bpf = uspi->s_fsize << 3; 1125 uspi->s_bpfshift = uspi->s_fshift + 3; 1126 uspi->s_bpfmask = uspi->s_bpf - 1; 1127 if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_44BSD || 1128 (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_UFS2) 1129 uspi->s_maxsymlinklen = 1130 fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen); 1131 1132 if (uspi->fs_magic == UFS2_MAGIC) 1133 maxsymlen = 2 * 4 * (UFS_NDADDR + UFS_NINDIR); 1134 else 1135 maxsymlen = 4 * (UFS_NDADDR + UFS_NINDIR); 1136 if (uspi->s_maxsymlinklen > maxsymlen) { 1137 ufs_warning(sb, __func__, "ufs_read_super: excessive maximum " 1138 "fast symlink size (%u)\n", uspi->s_maxsymlinklen); 1139 uspi->s_maxsymlinklen = maxsymlen; 1140 } 1141 1142 inode = ufs_iget(sb, UFS_ROOTINO); 1143 if (IS_ERR(inode)) { 1144 ret = PTR_ERR(inode); 1145 goto failed; 1146 } 1147 sb->s_root = d_alloc_root(inode); 1148 if (!sb->s_root) { 1149 ret = -ENOMEM; 1150 goto dalloc_failed; 1151 } 1152 1153 ufs_setup_cstotal(sb); 1154 /* 1155 * Read cylinder group structures 1156 */ 1157 if (!(sb->s_flags & MS_RDONLY)) 1158 if (!ufs_read_cylinder_structures(sb)) 1159 goto failed; 1160 1161 UFSD("EXIT\n"); 1162 return 0; 1163 1164 dalloc_failed: 1165 iput(inode); 1166 failed: 1167 if (ubh) 1168 ubh_brelse_uspi (uspi); 1169 kfree (uspi); 1170 kfree(sbi); 1171 sb->s_fs_info = NULL; 1172 UFSD("EXIT (FAILED)\n"); 1173 return ret; 1174 1175 failed_nomem: 1176 UFSD("EXIT (NOMEM)\n"); 1177 return -ENOMEM; 1178 } 1179 1180 static int ufs_sync_fs(struct super_block *sb, int wait) 1181 { 1182 struct ufs_sb_private_info * uspi; 1183 struct ufs_super_block_first * usb1; 1184 struct ufs_super_block_third * usb3; 1185 unsigned flags; 1186 1187 lock_super(sb); 1188 lock_kernel(); 1189 1190 UFSD("ENTER\n"); 1191 1192 flags = UFS_SB(sb)->s_flags; 1193 uspi = UFS_SB(sb)->s_uspi; 1194 usb1 = ubh_get_usb_first(uspi); 1195 usb3 = ubh_get_usb_third(uspi); 1196 1197 usb1->fs_time = cpu_to_fs32(sb, get_seconds()); 1198 if ((flags & UFS_ST_MASK) == UFS_ST_SUN || 1199 (flags & UFS_ST_MASK) == UFS_ST_SUNOS || 1200 (flags & UFS_ST_MASK) == UFS_ST_SUNx86) 1201 ufs_set_fs_state(sb, usb1, usb3, 1202 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time)); 1203 ufs_put_cstotal(sb); 1204 sb->s_dirt = 0; 1205 1206 UFSD("EXIT\n"); 1207 unlock_kernel(); 1208 unlock_super(sb); 1209 1210 return 0; 1211 } 1212 1213 static void ufs_write_super(struct super_block *sb) 1214 { 1215 if (!(sb->s_flags & MS_RDONLY)) 1216 ufs_sync_fs(sb, 1); 1217 else 1218 sb->s_dirt = 0; 1219 } 1220 1221 static void ufs_put_super(struct super_block *sb) 1222 { 1223 struct ufs_sb_info * sbi = UFS_SB(sb); 1224 1225 UFSD("ENTER\n"); 1226 1227 if (sb->s_dirt) 1228 ufs_write_super(sb); 1229 1230 if (!(sb->s_flags & MS_RDONLY)) 1231 ufs_put_super_internal(sb); 1232 1233 ubh_brelse_uspi (sbi->s_uspi); 1234 kfree (sbi->s_uspi); 1235 kfree (sbi); 1236 sb->s_fs_info = NULL; 1237 UFSD("EXIT\n"); 1238 return; 1239 } 1240 1241 1242 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data) 1243 { 1244 struct ufs_sb_private_info * uspi; 1245 struct ufs_super_block_first * usb1; 1246 struct ufs_super_block_third * usb3; 1247 unsigned new_mount_opt, ufstype; 1248 unsigned flags; 1249 1250 lock_kernel(); 1251 lock_super(sb); 1252 uspi = UFS_SB(sb)->s_uspi; 1253 flags = UFS_SB(sb)->s_flags; 1254 usb1 = ubh_get_usb_first(uspi); 1255 usb3 = ubh_get_usb_third(uspi); 1256 1257 /* 1258 * Allow the "check" option to be passed as a remount option. 1259 * It is not possible to change ufstype option during remount 1260 */ 1261 ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE; 1262 new_mount_opt = 0; 1263 ufs_set_opt (new_mount_opt, ONERROR_LOCK); 1264 if (!ufs_parse_options (data, &new_mount_opt)) { 1265 unlock_super(sb); 1266 unlock_kernel(); 1267 return -EINVAL; 1268 } 1269 if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) { 1270 new_mount_opt |= ufstype; 1271 } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) { 1272 printk("ufstype can't be changed during remount\n"); 1273 unlock_super(sb); 1274 unlock_kernel(); 1275 return -EINVAL; 1276 } 1277 1278 if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) { 1279 UFS_SB(sb)->s_mount_opt = new_mount_opt; 1280 unlock_super(sb); 1281 unlock_kernel(); 1282 return 0; 1283 } 1284 1285 /* 1286 * fs was mouted as rw, remounting ro 1287 */ 1288 if (*mount_flags & MS_RDONLY) { 1289 ufs_put_super_internal(sb); 1290 usb1->fs_time = cpu_to_fs32(sb, get_seconds()); 1291 if ((flags & UFS_ST_MASK) == UFS_ST_SUN 1292 || (flags & UFS_ST_MASK) == UFS_ST_SUNOS 1293 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86) 1294 ufs_set_fs_state(sb, usb1, usb3, 1295 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time)); 1296 ubh_mark_buffer_dirty (USPI_UBH(uspi)); 1297 sb->s_dirt = 0; 1298 sb->s_flags |= MS_RDONLY; 1299 } else { 1300 /* 1301 * fs was mounted as ro, remounting rw 1302 */ 1303 #ifndef CONFIG_UFS_FS_WRITE 1304 printk("ufs was compiled with read-only support, " 1305 "can't be mounted as read-write\n"); 1306 unlock_super(sb); 1307 unlock_kernel(); 1308 return -EINVAL; 1309 #else 1310 if (ufstype != UFS_MOUNT_UFSTYPE_SUN && 1311 ufstype != UFS_MOUNT_UFSTYPE_SUNOS && 1312 ufstype != UFS_MOUNT_UFSTYPE_44BSD && 1313 ufstype != UFS_MOUNT_UFSTYPE_SUNx86 && 1314 ufstype != UFS_MOUNT_UFSTYPE_UFS2) { 1315 printk("this ufstype is read-only supported\n"); 1316 unlock_super(sb); 1317 unlock_kernel(); 1318 return -EINVAL; 1319 } 1320 if (!ufs_read_cylinder_structures(sb)) { 1321 printk("failed during remounting\n"); 1322 unlock_super(sb); 1323 unlock_kernel(); 1324 return -EPERM; 1325 } 1326 sb->s_flags &= ~MS_RDONLY; 1327 #endif 1328 } 1329 UFS_SB(sb)->s_mount_opt = new_mount_opt; 1330 unlock_super(sb); 1331 unlock_kernel(); 1332 return 0; 1333 } 1334 1335 static int ufs_show_options(struct seq_file *seq, struct vfsmount *vfs) 1336 { 1337 struct ufs_sb_info *sbi = UFS_SB(vfs->mnt_sb); 1338 unsigned mval = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE; 1339 const struct match_token *tp = tokens; 1340 1341 while (tp->token != Opt_onerror_panic && tp->token != mval) 1342 ++tp; 1343 BUG_ON(tp->token == Opt_onerror_panic); 1344 seq_printf(seq, ",%s", tp->pattern); 1345 1346 mval = sbi->s_mount_opt & UFS_MOUNT_ONERROR; 1347 while (tp->token != Opt_err && tp->token != mval) 1348 ++tp; 1349 BUG_ON(tp->token == Opt_err); 1350 seq_printf(seq, ",%s", tp->pattern); 1351 1352 return 0; 1353 } 1354 1355 static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf) 1356 { 1357 struct super_block *sb = dentry->d_sb; 1358 struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi; 1359 unsigned flags = UFS_SB(sb)->s_flags; 1360 struct ufs_super_block_first *usb1; 1361 struct ufs_super_block_second *usb2; 1362 struct ufs_super_block_third *usb3; 1363 u64 id = huge_encode_dev(sb->s_bdev->bd_dev); 1364 1365 lock_kernel(); 1366 1367 usb1 = ubh_get_usb_first(uspi); 1368 usb2 = ubh_get_usb_second(uspi); 1369 usb3 = ubh_get_usb_third(uspi); 1370 1371 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { 1372 buf->f_type = UFS2_MAGIC; 1373 buf->f_blocks = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize); 1374 } else { 1375 buf->f_type = UFS_MAGIC; 1376 buf->f_blocks = uspi->s_dsize; 1377 } 1378 buf->f_bfree = ufs_blkstofrags(uspi->cs_total.cs_nbfree) + 1379 uspi->cs_total.cs_nffree; 1380 buf->f_ffree = uspi->cs_total.cs_nifree; 1381 buf->f_bsize = sb->s_blocksize; 1382 buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree)) 1383 ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0; 1384 buf->f_files = uspi->s_ncg * uspi->s_ipg; 1385 buf->f_namelen = UFS_MAXNAMLEN; 1386 buf->f_fsid.val[0] = (u32)id; 1387 buf->f_fsid.val[1] = (u32)(id >> 32); 1388 1389 unlock_kernel(); 1390 1391 return 0; 1392 } 1393 1394 static struct kmem_cache * ufs_inode_cachep; 1395 1396 static struct inode *ufs_alloc_inode(struct super_block *sb) 1397 { 1398 struct ufs_inode_info *ei; 1399 ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, GFP_KERNEL); 1400 if (!ei) 1401 return NULL; 1402 ei->vfs_inode.i_version = 1; 1403 return &ei->vfs_inode; 1404 } 1405 1406 static void ufs_destroy_inode(struct inode *inode) 1407 { 1408 kmem_cache_free(ufs_inode_cachep, UFS_I(inode)); 1409 } 1410 1411 static void init_once(void *foo) 1412 { 1413 struct ufs_inode_info *ei = (struct ufs_inode_info *) foo; 1414 1415 inode_init_once(&ei->vfs_inode); 1416 } 1417 1418 static int init_inodecache(void) 1419 { 1420 ufs_inode_cachep = kmem_cache_create("ufs_inode_cache", 1421 sizeof(struct ufs_inode_info), 1422 0, (SLAB_RECLAIM_ACCOUNT| 1423 SLAB_MEM_SPREAD), 1424 init_once); 1425 if (ufs_inode_cachep == NULL) 1426 return -ENOMEM; 1427 return 0; 1428 } 1429 1430 static void destroy_inodecache(void) 1431 { 1432 kmem_cache_destroy(ufs_inode_cachep); 1433 } 1434 1435 #ifdef CONFIG_QUOTA 1436 static ssize_t ufs_quota_read(struct super_block *, int, char *,size_t, loff_t); 1437 static ssize_t ufs_quota_write(struct super_block *, int, const char *, size_t, loff_t); 1438 #endif 1439 1440 static const struct super_operations ufs_super_ops = { 1441 .alloc_inode = ufs_alloc_inode, 1442 .destroy_inode = ufs_destroy_inode, 1443 .write_inode = ufs_write_inode, 1444 .delete_inode = ufs_delete_inode, 1445 .put_super = ufs_put_super, 1446 .write_super = ufs_write_super, 1447 .sync_fs = ufs_sync_fs, 1448 .statfs = ufs_statfs, 1449 .remount_fs = ufs_remount, 1450 .show_options = ufs_show_options, 1451 #ifdef CONFIG_QUOTA 1452 .quota_read = ufs_quota_read, 1453 .quota_write = ufs_quota_write, 1454 #endif 1455 }; 1456 1457 #ifdef CONFIG_QUOTA 1458 1459 /* Read data from quotafile - avoid pagecache and such because we cannot afford 1460 * acquiring the locks... As quota files are never truncated and quota code 1461 * itself serializes the operations (and noone else should touch the files) 1462 * we don't have to be afraid of races */ 1463 static ssize_t ufs_quota_read(struct super_block *sb, int type, char *data, 1464 size_t len, loff_t off) 1465 { 1466 struct inode *inode = sb_dqopt(sb)->files[type]; 1467 sector_t blk = off >> sb->s_blocksize_bits; 1468 int err = 0; 1469 int offset = off & (sb->s_blocksize - 1); 1470 int tocopy; 1471 size_t toread; 1472 struct buffer_head *bh; 1473 loff_t i_size = i_size_read(inode); 1474 1475 if (off > i_size) 1476 return 0; 1477 if (off+len > i_size) 1478 len = i_size-off; 1479 toread = len; 1480 while (toread > 0) { 1481 tocopy = sb->s_blocksize - offset < toread ? 1482 sb->s_blocksize - offset : toread; 1483 1484 bh = ufs_bread(inode, blk, 0, &err); 1485 if (err) 1486 return err; 1487 if (!bh) /* A hole? */ 1488 memset(data, 0, tocopy); 1489 else { 1490 memcpy(data, bh->b_data+offset, tocopy); 1491 brelse(bh); 1492 } 1493 offset = 0; 1494 toread -= tocopy; 1495 data += tocopy; 1496 blk++; 1497 } 1498 return len; 1499 } 1500 1501 /* Write to quotafile */ 1502 static ssize_t ufs_quota_write(struct super_block *sb, int type, 1503 const char *data, size_t len, loff_t off) 1504 { 1505 struct inode *inode = sb_dqopt(sb)->files[type]; 1506 sector_t blk = off >> sb->s_blocksize_bits; 1507 int err = 0; 1508 int offset = off & (sb->s_blocksize - 1); 1509 int tocopy; 1510 size_t towrite = len; 1511 struct buffer_head *bh; 1512 1513 mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); 1514 while (towrite > 0) { 1515 tocopy = sb->s_blocksize - offset < towrite ? 1516 sb->s_blocksize - offset : towrite; 1517 1518 bh = ufs_bread(inode, blk, 1, &err); 1519 if (!bh) 1520 goto out; 1521 lock_buffer(bh); 1522 memcpy(bh->b_data+offset, data, tocopy); 1523 flush_dcache_page(bh->b_page); 1524 set_buffer_uptodate(bh); 1525 mark_buffer_dirty(bh); 1526 unlock_buffer(bh); 1527 brelse(bh); 1528 offset = 0; 1529 towrite -= tocopy; 1530 data += tocopy; 1531 blk++; 1532 } 1533 out: 1534 if (len == towrite) { 1535 mutex_unlock(&inode->i_mutex); 1536 return err; 1537 } 1538 if (inode->i_size < off+len-towrite) 1539 i_size_write(inode, off+len-towrite); 1540 inode->i_version++; 1541 inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC; 1542 mark_inode_dirty(inode); 1543 mutex_unlock(&inode->i_mutex); 1544 return len - towrite; 1545 } 1546 1547 #endif 1548 1549 static int ufs_get_sb(struct file_system_type *fs_type, 1550 int flags, const char *dev_name, void *data, struct vfsmount *mnt) 1551 { 1552 return get_sb_bdev(fs_type, flags, dev_name, data, ufs_fill_super, mnt); 1553 } 1554 1555 static struct file_system_type ufs_fs_type = { 1556 .owner = THIS_MODULE, 1557 .name = "ufs", 1558 .get_sb = ufs_get_sb, 1559 .kill_sb = kill_block_super, 1560 .fs_flags = FS_REQUIRES_DEV, 1561 }; 1562 1563 static int __init init_ufs_fs(void) 1564 { 1565 int err = init_inodecache(); 1566 if (err) 1567 goto out1; 1568 err = register_filesystem(&ufs_fs_type); 1569 if (err) 1570 goto out; 1571 return 0; 1572 out: 1573 destroy_inodecache(); 1574 out1: 1575 return err; 1576 } 1577 1578 static void __exit exit_ufs_fs(void) 1579 { 1580 unregister_filesystem(&ufs_fs_type); 1581 destroy_inodecache(); 1582 } 1583 1584 module_init(init_ufs_fs) 1585 module_exit(exit_ufs_fs) 1586 MODULE_LICENSE("GPL"); 1587