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#include <linux/exportfs.h> 69#include <linux/module.h> 70#include <linux/bitops.h> 71 72#include <stdarg.h> 73 74#include <asm/uaccess.h> 75 76#include <linux/errno.h> 77#include <linux/fs.h> 78#include <linux/slab.h> 79#include <linux/time.h> 80#include <linux/stat.h> 81#include <linux/string.h> 82#include <linux/blkdev.h> 83#include <linux/init.h> 84#include <linux/parser.h> 85#include <linux/buffer_head.h> 86#include <linux/vfs.h> 87#include <linux/log2.h> 88#include <linux/mount.h> 89#include <linux/seq_file.h> 90 91#include "ufs_fs.h" 92#include "ufs.h" 93#include "swab.h" 94#include "util.h" 95 96void lock_ufs(struct super_block *sb) 97{ 98 struct ufs_sb_info *sbi = UFS_SB(sb); 99 100 mutex_lock(&sbi->mutex); 101 sbi->mutex_owner = current; 102} 103 104void unlock_ufs(struct super_block *sb) 105{ 106 struct ufs_sb_info *sbi = UFS_SB(sb); 107 108 sbi->mutex_owner = NULL; 109 mutex_unlock(&sbi->mutex); 110} 111 112static struct inode *ufs_nfs_get_inode(struct super_block *sb, u64 ino, u32 generation) 113{ 114 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 115 struct inode *inode; 116 117 if (ino < UFS_ROOTINO || ino > uspi->s_ncg * uspi->s_ipg) 118 return ERR_PTR(-ESTALE); 119 120 inode = ufs_iget(sb, ino); 121 if (IS_ERR(inode)) 122 return ERR_CAST(inode); 123 if (generation && inode->i_generation != generation) { 124 iput(inode); 125 return ERR_PTR(-ESTALE); 126 } 127 return inode; 128} 129 130static struct dentry *ufs_fh_to_dentry(struct super_block *sb, struct fid *fid, 131 int fh_len, int fh_type) 132{ 133 return generic_fh_to_dentry(sb, fid, fh_len, fh_type, ufs_nfs_get_inode); 134} 135 136static struct dentry *ufs_fh_to_parent(struct super_block *sb, struct fid *fid, 137 int fh_len, int fh_type) 138{ 139 return generic_fh_to_parent(sb, fid, fh_len, fh_type, ufs_nfs_get_inode); 140} 141 142static struct dentry *ufs_get_parent(struct dentry *child) 143{ 144 struct qstr dot_dot = QSTR_INIT("..", 2); 145 ino_t ino; 146 147 ino = ufs_inode_by_name(d_inode(child), &dot_dot); 148 if (!ino) 149 return ERR_PTR(-ENOENT); 150 return d_obtain_alias(ufs_iget(d_inode(child)->i_sb, ino)); 151} 152 153static const struct export_operations ufs_export_ops = { 154 .fh_to_dentry = ufs_fh_to_dentry, 155 .fh_to_parent = ufs_fh_to_parent, 156 .get_parent = ufs_get_parent, 157}; 158 159#ifdef CONFIG_UFS_DEBUG 160/* 161 * Print contents of ufs_super_block, useful for debugging 162 */ 163static void ufs_print_super_stuff(struct super_block *sb, 164 struct ufs_super_block_first *usb1, 165 struct ufs_super_block_second *usb2, 166 struct ufs_super_block_third *usb3) 167{ 168 u32 magic = fs32_to_cpu(sb, usb3->fs_magic); 169 170 pr_debug("ufs_print_super_stuff\n"); 171 pr_debug(" magic: 0x%x\n", magic); 172 if (fs32_to_cpu(sb, usb3->fs_magic) == UFS2_MAGIC) { 173 pr_debug(" fs_size: %llu\n", (unsigned long long) 174 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size)); 175 pr_debug(" fs_dsize: %llu\n", (unsigned long long) 176 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize)); 177 pr_debug(" bsize: %u\n", 178 fs32_to_cpu(sb, usb1->fs_bsize)); 179 pr_debug(" fsize: %u\n", 180 fs32_to_cpu(sb, usb1->fs_fsize)); 181 pr_debug(" fs_volname: %s\n", usb2->fs_un.fs_u2.fs_volname); 182 pr_debug(" fs_sblockloc: %llu\n", (unsigned long long) 183 fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc)); 184 pr_debug(" cs_ndir(No of dirs): %llu\n", (unsigned long long) 185 fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir)); 186 pr_debug(" cs_nbfree(No of free blocks): %llu\n", 187 (unsigned long long) 188 fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree)); 189 pr_info(" cs_nifree(Num of free inodes): %llu\n", 190 (unsigned long long) 191 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree)); 192 pr_info(" cs_nffree(Num of free frags): %llu\n", 193 (unsigned long long) 194 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree)); 195 pr_info(" fs_maxsymlinklen: %u\n", 196 fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen)); 197 } else { 198 pr_debug(" sblkno: %u\n", fs32_to_cpu(sb, usb1->fs_sblkno)); 199 pr_debug(" cblkno: %u\n", fs32_to_cpu(sb, usb1->fs_cblkno)); 200 pr_debug(" iblkno: %u\n", fs32_to_cpu(sb, usb1->fs_iblkno)); 201 pr_debug(" dblkno: %u\n", fs32_to_cpu(sb, usb1->fs_dblkno)); 202 pr_debug(" cgoffset: %u\n", 203 fs32_to_cpu(sb, usb1->fs_cgoffset)); 204 pr_debug(" ~cgmask: 0x%x\n", 205 ~fs32_to_cpu(sb, usb1->fs_cgmask)); 206 pr_debug(" size: %u\n", fs32_to_cpu(sb, usb1->fs_size)); 207 pr_debug(" dsize: %u\n", fs32_to_cpu(sb, usb1->fs_dsize)); 208 pr_debug(" ncg: %u\n", fs32_to_cpu(sb, usb1->fs_ncg)); 209 pr_debug(" bsize: %u\n", fs32_to_cpu(sb, usb1->fs_bsize)); 210 pr_debug(" fsize: %u\n", fs32_to_cpu(sb, usb1->fs_fsize)); 211 pr_debug(" frag: %u\n", fs32_to_cpu(sb, usb1->fs_frag)); 212 pr_debug(" fragshift: %u\n", 213 fs32_to_cpu(sb, usb1->fs_fragshift)); 214 pr_debug(" ~fmask: %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask)); 215 pr_debug(" fshift: %u\n", fs32_to_cpu(sb, usb1->fs_fshift)); 216 pr_debug(" sbsize: %u\n", fs32_to_cpu(sb, usb1->fs_sbsize)); 217 pr_debug(" spc: %u\n", fs32_to_cpu(sb, usb1->fs_spc)); 218 pr_debug(" cpg: %u\n", fs32_to_cpu(sb, usb1->fs_cpg)); 219 pr_debug(" ipg: %u\n", fs32_to_cpu(sb, usb1->fs_ipg)); 220 pr_debug(" fpg: %u\n", fs32_to_cpu(sb, usb1->fs_fpg)); 221 pr_debug(" csaddr: %u\n", fs32_to_cpu(sb, usb1->fs_csaddr)); 222 pr_debug(" cssize: %u\n", fs32_to_cpu(sb, usb1->fs_cssize)); 223 pr_debug(" cgsize: %u\n", fs32_to_cpu(sb, usb1->fs_cgsize)); 224 pr_debug(" fstodb: %u\n", 225 fs32_to_cpu(sb, usb1->fs_fsbtodb)); 226 pr_debug(" nrpos: %u\n", fs32_to_cpu(sb, usb3->fs_nrpos)); 227 pr_debug(" ndir %u\n", 228 fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir)); 229 pr_debug(" nifree %u\n", 230 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree)); 231 pr_debug(" nbfree %u\n", 232 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree)); 233 pr_debug(" nffree %u\n", 234 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree)); 235 } 236 pr_debug("\n"); 237} 238 239/* 240 * Print contents of ufs_cylinder_group, useful for debugging 241 */ 242static void ufs_print_cylinder_stuff(struct super_block *sb, 243 struct ufs_cylinder_group *cg) 244{ 245 pr_debug("\nufs_print_cylinder_stuff\n"); 246 pr_debug("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group)); 247 pr_debug(" magic: %x\n", fs32_to_cpu(sb, cg->cg_magic)); 248 pr_debug(" time: %u\n", fs32_to_cpu(sb, cg->cg_time)); 249 pr_debug(" cgx: %u\n", fs32_to_cpu(sb, cg->cg_cgx)); 250 pr_debug(" ncyl: %u\n", fs16_to_cpu(sb, cg->cg_ncyl)); 251 pr_debug(" niblk: %u\n", fs16_to_cpu(sb, cg->cg_niblk)); 252 pr_debug(" ndblk: %u\n", fs32_to_cpu(sb, cg->cg_ndblk)); 253 pr_debug(" cs_ndir: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir)); 254 pr_debug(" cs_nbfree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree)); 255 pr_debug(" cs_nifree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree)); 256 pr_debug(" cs_nffree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree)); 257 pr_debug(" rotor: %u\n", fs32_to_cpu(sb, cg->cg_rotor)); 258 pr_debug(" frotor: %u\n", fs32_to_cpu(sb, cg->cg_frotor)); 259 pr_debug(" irotor: %u\n", fs32_to_cpu(sb, cg->cg_irotor)); 260 pr_debug(" frsum: %u, %u, %u, %u, %u, %u, %u, %u\n", 261 fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]), 262 fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]), 263 fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]), 264 fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7])); 265 pr_debug(" btotoff: %u\n", fs32_to_cpu(sb, cg->cg_btotoff)); 266 pr_debug(" boff: %u\n", fs32_to_cpu(sb, cg->cg_boff)); 267 pr_debug(" iuseoff: %u\n", fs32_to_cpu(sb, cg->cg_iusedoff)); 268 pr_debug(" freeoff: %u\n", fs32_to_cpu(sb, cg->cg_freeoff)); 269 pr_debug(" nextfreeoff: %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff)); 270 pr_debug(" clustersumoff %u\n", 271 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff)); 272 pr_debug(" clusteroff %u\n", 273 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff)); 274 pr_debug(" nclusterblks %u\n", 275 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks)); 276 pr_debug("\n"); 277} 278#else 279# define ufs_print_super_stuff(sb, usb1, usb2, usb3) /**/ 280# define ufs_print_cylinder_stuff(sb, cg) /**/ 281#endif /* CONFIG_UFS_DEBUG */ 282 283static const struct super_operations ufs_super_ops; 284 285void ufs_error (struct super_block * sb, const char * function, 286 const char * fmt, ...) 287{ 288 struct ufs_sb_private_info * uspi; 289 struct ufs_super_block_first * usb1; 290 struct va_format vaf; 291 va_list args; 292 293 uspi = UFS_SB(sb)->s_uspi; 294 usb1 = ubh_get_usb_first(uspi); 295 296 if (!(sb->s_flags & MS_RDONLY)) { 297 usb1->fs_clean = UFS_FSBAD; 298 ubh_mark_buffer_dirty(USPI_UBH(uspi)); 299 ufs_mark_sb_dirty(sb); 300 sb->s_flags |= MS_RDONLY; 301 } 302 va_start(args, fmt); 303 vaf.fmt = fmt; 304 vaf.va = &args; 305 switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) { 306 case UFS_MOUNT_ONERROR_PANIC: 307 panic("panic (device %s): %s: %pV\n", 308 sb->s_id, function, &vaf); 309 310 case UFS_MOUNT_ONERROR_LOCK: 311 case UFS_MOUNT_ONERROR_UMOUNT: 312 case UFS_MOUNT_ONERROR_REPAIR: 313 pr_crit("error (device %s): %s: %pV\n", 314 sb->s_id, function, &vaf); 315 } 316 va_end(args); 317} 318 319void ufs_panic (struct super_block * sb, const char * function, 320 const char * fmt, ...) 321{ 322 struct ufs_sb_private_info * uspi; 323 struct ufs_super_block_first * usb1; 324 struct va_format vaf; 325 va_list args; 326 327 uspi = UFS_SB(sb)->s_uspi; 328 usb1 = ubh_get_usb_first(uspi); 329 330 if (!(sb->s_flags & MS_RDONLY)) { 331 usb1->fs_clean = UFS_FSBAD; 332 ubh_mark_buffer_dirty(USPI_UBH(uspi)); 333 ufs_mark_sb_dirty(sb); 334 } 335 va_start(args, fmt); 336 vaf.fmt = fmt; 337 vaf.va = &args; 338 sb->s_flags |= MS_RDONLY; 339 pr_crit("panic (device %s): %s: %pV\n", 340 sb->s_id, function, &vaf); 341 va_end(args); 342} 343 344void ufs_warning (struct super_block * sb, const char * function, 345 const char * fmt, ...) 346{ 347 struct va_format vaf; 348 va_list args; 349 350 va_start(args, fmt); 351 vaf.fmt = fmt; 352 vaf.va = &args; 353 pr_warn("(device %s): %s: %pV\n", 354 sb->s_id, function, &vaf); 355 va_end(args); 356} 357 358enum { 359 Opt_type_old = UFS_MOUNT_UFSTYPE_OLD, 360 Opt_type_sunx86 = UFS_MOUNT_UFSTYPE_SUNx86, 361 Opt_type_sun = UFS_MOUNT_UFSTYPE_SUN, 362 Opt_type_sunos = UFS_MOUNT_UFSTYPE_SUNOS, 363 Opt_type_44bsd = UFS_MOUNT_UFSTYPE_44BSD, 364 Opt_type_ufs2 = UFS_MOUNT_UFSTYPE_UFS2, 365 Opt_type_hp = UFS_MOUNT_UFSTYPE_HP, 366 Opt_type_nextstepcd = UFS_MOUNT_UFSTYPE_NEXTSTEP_CD, 367 Opt_type_nextstep = UFS_MOUNT_UFSTYPE_NEXTSTEP, 368 Opt_type_openstep = UFS_MOUNT_UFSTYPE_OPENSTEP, 369 Opt_onerror_panic = UFS_MOUNT_ONERROR_PANIC, 370 Opt_onerror_lock = UFS_MOUNT_ONERROR_LOCK, 371 Opt_onerror_umount = UFS_MOUNT_ONERROR_UMOUNT, 372 Opt_onerror_repair = UFS_MOUNT_ONERROR_REPAIR, 373 Opt_err 374}; 375 376static const match_table_t tokens = { 377 {Opt_type_old, "ufstype=old"}, 378 {Opt_type_sunx86, "ufstype=sunx86"}, 379 {Opt_type_sun, "ufstype=sun"}, 380 {Opt_type_sunos, "ufstype=sunos"}, 381 {Opt_type_44bsd, "ufstype=44bsd"}, 382 {Opt_type_ufs2, "ufstype=ufs2"}, 383 {Opt_type_ufs2, "ufstype=5xbsd"}, 384 {Opt_type_hp, "ufstype=hp"}, 385 {Opt_type_nextstepcd, "ufstype=nextstep-cd"}, 386 {Opt_type_nextstep, "ufstype=nextstep"}, 387 {Opt_type_openstep, "ufstype=openstep"}, 388/*end of possible ufs types */ 389 {Opt_onerror_panic, "onerror=panic"}, 390 {Opt_onerror_lock, "onerror=lock"}, 391 {Opt_onerror_umount, "onerror=umount"}, 392 {Opt_onerror_repair, "onerror=repair"}, 393 {Opt_err, NULL} 394}; 395 396static int ufs_parse_options (char * options, unsigned * mount_options) 397{ 398 char * p; 399 400 UFSD("ENTER\n"); 401 402 if (!options) 403 return 1; 404 405 while ((p = strsep(&options, ",")) != NULL) { 406 substring_t args[MAX_OPT_ARGS]; 407 int token; 408 if (!*p) 409 continue; 410 411 token = match_token(p, tokens, args); 412 switch (token) { 413 case Opt_type_old: 414 ufs_clear_opt (*mount_options, UFSTYPE); 415 ufs_set_opt (*mount_options, UFSTYPE_OLD); 416 break; 417 case Opt_type_sunx86: 418 ufs_clear_opt (*mount_options, UFSTYPE); 419 ufs_set_opt (*mount_options, UFSTYPE_SUNx86); 420 break; 421 case Opt_type_sun: 422 ufs_clear_opt (*mount_options, UFSTYPE); 423 ufs_set_opt (*mount_options, UFSTYPE_SUN); 424 break; 425 case Opt_type_sunos: 426 ufs_clear_opt(*mount_options, UFSTYPE); 427 ufs_set_opt(*mount_options, UFSTYPE_SUNOS); 428 break; 429 case Opt_type_44bsd: 430 ufs_clear_opt (*mount_options, UFSTYPE); 431 ufs_set_opt (*mount_options, UFSTYPE_44BSD); 432 break; 433 case Opt_type_ufs2: 434 ufs_clear_opt(*mount_options, UFSTYPE); 435 ufs_set_opt(*mount_options, UFSTYPE_UFS2); 436 break; 437 case Opt_type_hp: 438 ufs_clear_opt (*mount_options, UFSTYPE); 439 ufs_set_opt (*mount_options, UFSTYPE_HP); 440 break; 441 case Opt_type_nextstepcd: 442 ufs_clear_opt (*mount_options, UFSTYPE); 443 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD); 444 break; 445 case Opt_type_nextstep: 446 ufs_clear_opt (*mount_options, UFSTYPE); 447 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP); 448 break; 449 case Opt_type_openstep: 450 ufs_clear_opt (*mount_options, UFSTYPE); 451 ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP); 452 break; 453 case Opt_onerror_panic: 454 ufs_clear_opt (*mount_options, ONERROR); 455 ufs_set_opt (*mount_options, ONERROR_PANIC); 456 break; 457 case Opt_onerror_lock: 458 ufs_clear_opt (*mount_options, ONERROR); 459 ufs_set_opt (*mount_options, ONERROR_LOCK); 460 break; 461 case Opt_onerror_umount: 462 ufs_clear_opt (*mount_options, ONERROR); 463 ufs_set_opt (*mount_options, ONERROR_UMOUNT); 464 break; 465 case Opt_onerror_repair: 466 pr_err("Unable to do repair on error, will lock lock instead\n"); 467 ufs_clear_opt (*mount_options, ONERROR); 468 ufs_set_opt (*mount_options, ONERROR_REPAIR); 469 break; 470 default: 471 pr_err("Invalid option: \"%s\" or missing value\n", p); 472 return 0; 473 } 474 } 475 return 1; 476} 477 478/* 479 * Different types of UFS hold fs_cstotal in different 480 * places, and use different data structure for it. 481 * To make things simpler we just copy fs_cstotal to ufs_sb_private_info 482 */ 483static void ufs_setup_cstotal(struct super_block *sb) 484{ 485 struct ufs_sb_info *sbi = UFS_SB(sb); 486 struct ufs_sb_private_info *uspi = sbi->s_uspi; 487 struct ufs_super_block_first *usb1; 488 struct ufs_super_block_second *usb2; 489 struct ufs_super_block_third *usb3; 490 unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE; 491 492 UFSD("ENTER, mtype=%u\n", mtype); 493 usb1 = ubh_get_usb_first(uspi); 494 usb2 = ubh_get_usb_second(uspi); 495 usb3 = ubh_get_usb_third(uspi); 496 497 if ((mtype == UFS_MOUNT_UFSTYPE_44BSD && 498 (usb1->fs_flags & UFS_FLAGS_UPDATED)) || 499 mtype == UFS_MOUNT_UFSTYPE_UFS2) { 500 /*we have statistic in different place, then usual*/ 501 uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir); 502 uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree); 503 uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree); 504 uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree); 505 } else { 506 uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir); 507 uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree); 508 uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree); 509 uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree); 510 } 511 UFSD("EXIT\n"); 512} 513 514/* 515 * Read on-disk structures associated with cylinder groups 516 */ 517static int ufs_read_cylinder_structures(struct super_block *sb) 518{ 519 struct ufs_sb_info *sbi = UFS_SB(sb); 520 struct ufs_sb_private_info *uspi = sbi->s_uspi; 521 struct ufs_buffer_head * ubh; 522 unsigned char * base, * space; 523 unsigned size, blks, i; 524 525 UFSD("ENTER\n"); 526 527 /* 528 * Read cs structures from (usually) first data block 529 * on the device. 530 */ 531 size = uspi->s_cssize; 532 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift; 533 base = space = kmalloc(size, GFP_NOFS); 534 if (!base) 535 goto failed; 536 sbi->s_csp = (struct ufs_csum *)space; 537 for (i = 0; i < blks; i += uspi->s_fpb) { 538 size = uspi->s_bsize; 539 if (i + uspi->s_fpb > blks) 540 size = (blks - i) * uspi->s_fsize; 541 542 ubh = ubh_bread(sb, uspi->s_csaddr + i, size); 543 544 if (!ubh) 545 goto failed; 546 547 ubh_ubhcpymem (space, ubh, size); 548 549 space += size; 550 ubh_brelse (ubh); 551 ubh = NULL; 552 } 553 554 /* 555 * Read cylinder group (we read only first fragment from block 556 * at this time) and prepare internal data structures for cg caching. 557 */ 558 if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_NOFS))) 559 goto failed; 560 for (i = 0; i < uspi->s_ncg; i++) 561 sbi->s_ucg[i] = NULL; 562 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) { 563 sbi->s_ucpi[i] = NULL; 564 sbi->s_cgno[i] = UFS_CGNO_EMPTY; 565 } 566 for (i = 0; i < uspi->s_ncg; i++) { 567 UFSD("read cg %u\n", i); 568 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i)))) 569 goto failed; 570 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data)) 571 goto failed; 572 573 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data); 574 } 575 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) { 576 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_NOFS))) 577 goto failed; 578 sbi->s_cgno[i] = UFS_CGNO_EMPTY; 579 } 580 sbi->s_cg_loaded = 0; 581 UFSD("EXIT\n"); 582 return 1; 583 584failed: 585 kfree (base); 586 if (sbi->s_ucg) { 587 for (i = 0; i < uspi->s_ncg; i++) 588 if (sbi->s_ucg[i]) 589 brelse (sbi->s_ucg[i]); 590 kfree (sbi->s_ucg); 591 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) 592 kfree (sbi->s_ucpi[i]); 593 } 594 UFSD("EXIT (FAILED)\n"); 595 return 0; 596} 597 598/* 599 * Sync our internal copy of fs_cstotal with disk 600 */ 601static void ufs_put_cstotal(struct super_block *sb) 602{ 603 unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE; 604 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 605 struct ufs_super_block_first *usb1; 606 struct ufs_super_block_second *usb2; 607 struct ufs_super_block_third *usb3; 608 609 UFSD("ENTER\n"); 610 usb1 = ubh_get_usb_first(uspi); 611 usb2 = ubh_get_usb_second(uspi); 612 usb3 = ubh_get_usb_third(uspi); 613 614 if ((mtype == UFS_MOUNT_UFSTYPE_44BSD && 615 (usb1->fs_flags & UFS_FLAGS_UPDATED)) || 616 mtype == UFS_MOUNT_UFSTYPE_UFS2) { 617 /*we have statistic in different place, then usual*/ 618 usb2->fs_un.fs_u2.cs_ndir = 619 cpu_to_fs64(sb, uspi->cs_total.cs_ndir); 620 usb2->fs_un.fs_u2.cs_nbfree = 621 cpu_to_fs64(sb, uspi->cs_total.cs_nbfree); 622 usb3->fs_un1.fs_u2.cs_nifree = 623 cpu_to_fs64(sb, uspi->cs_total.cs_nifree); 624 usb3->fs_un1.fs_u2.cs_nffree = 625 cpu_to_fs64(sb, uspi->cs_total.cs_nffree); 626 } else { 627 usb1->fs_cstotal.cs_ndir = 628 cpu_to_fs32(sb, uspi->cs_total.cs_ndir); 629 usb1->fs_cstotal.cs_nbfree = 630 cpu_to_fs32(sb, uspi->cs_total.cs_nbfree); 631 usb1->fs_cstotal.cs_nifree = 632 cpu_to_fs32(sb, uspi->cs_total.cs_nifree); 633 usb1->fs_cstotal.cs_nffree = 634 cpu_to_fs32(sb, uspi->cs_total.cs_nffree); 635 } 636 ubh_mark_buffer_dirty(USPI_UBH(uspi)); 637 ufs_print_super_stuff(sb, usb1, usb2, usb3); 638 UFSD("EXIT\n"); 639} 640 641/** 642 * ufs_put_super_internal() - put on-disk intrenal structures 643 * @sb: pointer to super_block structure 644 * Put on-disk structures associated with cylinder groups 645 * and write them back to disk, also update cs_total on disk 646 */ 647static void ufs_put_super_internal(struct super_block *sb) 648{ 649 struct ufs_sb_info *sbi = UFS_SB(sb); 650 struct ufs_sb_private_info *uspi = sbi->s_uspi; 651 struct ufs_buffer_head * ubh; 652 unsigned char * base, * space; 653 unsigned blks, size, i; 654 655 656 UFSD("ENTER\n"); 657 658 ufs_put_cstotal(sb); 659 size = uspi->s_cssize; 660 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift; 661 base = space = (char*) sbi->s_csp; 662 for (i = 0; i < blks; i += uspi->s_fpb) { 663 size = uspi->s_bsize; 664 if (i + uspi->s_fpb > blks) 665 size = (blks - i) * uspi->s_fsize; 666 667 ubh = ubh_bread(sb, uspi->s_csaddr + i, size); 668 669 ubh_memcpyubh (ubh, space, size); 670 space += size; 671 ubh_mark_buffer_uptodate (ubh, 1); 672 ubh_mark_buffer_dirty (ubh); 673 ubh_brelse (ubh); 674 } 675 for (i = 0; i < sbi->s_cg_loaded; i++) { 676 ufs_put_cylinder (sb, i); 677 kfree (sbi->s_ucpi[i]); 678 } 679 for (; i < UFS_MAX_GROUP_LOADED; i++) 680 kfree (sbi->s_ucpi[i]); 681 for (i = 0; i < uspi->s_ncg; i++) 682 brelse (sbi->s_ucg[i]); 683 kfree (sbi->s_ucg); 684 kfree (base); 685 686 UFSD("EXIT\n"); 687} 688 689static int ufs_sync_fs(struct super_block *sb, int wait) 690{ 691 struct ufs_sb_private_info * uspi; 692 struct ufs_super_block_first * usb1; 693 struct ufs_super_block_third * usb3; 694 unsigned flags; 695 696 lock_ufs(sb); 697 mutex_lock(&UFS_SB(sb)->s_lock); 698 699 UFSD("ENTER\n"); 700 701 flags = UFS_SB(sb)->s_flags; 702 uspi = UFS_SB(sb)->s_uspi; 703 usb1 = ubh_get_usb_first(uspi); 704 usb3 = ubh_get_usb_third(uspi); 705 706 usb1->fs_time = cpu_to_fs32(sb, get_seconds()); 707 if ((flags & UFS_ST_MASK) == UFS_ST_SUN || 708 (flags & UFS_ST_MASK) == UFS_ST_SUNOS || 709 (flags & UFS_ST_MASK) == UFS_ST_SUNx86) 710 ufs_set_fs_state(sb, usb1, usb3, 711 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time)); 712 ufs_put_cstotal(sb); 713 714 UFSD("EXIT\n"); 715 mutex_unlock(&UFS_SB(sb)->s_lock); 716 unlock_ufs(sb); 717 718 return 0; 719} 720 721static void delayed_sync_fs(struct work_struct *work) 722{ 723 struct ufs_sb_info *sbi; 724 725 sbi = container_of(work, struct ufs_sb_info, sync_work.work); 726 727 spin_lock(&sbi->work_lock); 728 sbi->work_queued = 0; 729 spin_unlock(&sbi->work_lock); 730 731 ufs_sync_fs(sbi->sb, 1); 732} 733 734void ufs_mark_sb_dirty(struct super_block *sb) 735{ 736 struct ufs_sb_info *sbi = UFS_SB(sb); 737 unsigned long delay; 738 739 spin_lock(&sbi->work_lock); 740 if (!sbi->work_queued) { 741 delay = msecs_to_jiffies(dirty_writeback_interval * 10); 742 queue_delayed_work(system_long_wq, &sbi->sync_work, delay); 743 sbi->work_queued = 1; 744 } 745 spin_unlock(&sbi->work_lock); 746} 747 748static void ufs_put_super(struct super_block *sb) 749{ 750 struct ufs_sb_info * sbi = UFS_SB(sb); 751 752 UFSD("ENTER\n"); 753 754 if (!(sb->s_flags & MS_RDONLY)) 755 ufs_put_super_internal(sb); 756 cancel_delayed_work_sync(&sbi->sync_work); 757 758 ubh_brelse_uspi (sbi->s_uspi); 759 kfree (sbi->s_uspi); 760 mutex_destroy(&sbi->mutex); 761 kfree (sbi); 762 sb->s_fs_info = NULL; 763 UFSD("EXIT\n"); 764 return; 765} 766 767static int ufs_fill_super(struct super_block *sb, void *data, int silent) 768{ 769 struct ufs_sb_info * sbi; 770 struct ufs_sb_private_info * uspi; 771 struct ufs_super_block_first * usb1; 772 struct ufs_super_block_second * usb2; 773 struct ufs_super_block_third * usb3; 774 struct ufs_buffer_head * ubh; 775 struct inode *inode; 776 unsigned block_size, super_block_size; 777 unsigned flags; 778 unsigned super_block_offset; 779 unsigned maxsymlen; 780 int ret = -EINVAL; 781 782 uspi = NULL; 783 ubh = NULL; 784 flags = 0; 785 786 UFSD("ENTER\n"); 787 788#ifndef CONFIG_UFS_FS_WRITE 789 if (!(sb->s_flags & MS_RDONLY)) { 790 pr_err("ufs was compiled with read-only support, can't be mounted as read-write\n"); 791 return -EROFS; 792 } 793#endif 794 795 sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL); 796 if (!sbi) 797 goto failed_nomem; 798 sb->s_fs_info = sbi; 799 sbi->sb = sb; 800 801 UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY)); 802 803 mutex_init(&sbi->mutex); 804 mutex_init(&sbi->s_lock); 805 spin_lock_init(&sbi->work_lock); 806 INIT_DELAYED_WORK(&sbi->sync_work, delayed_sync_fs); 807 /* 808 * Set default mount options 809 * Parse mount options 810 */ 811 sbi->s_mount_opt = 0; 812 ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK); 813 if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) { 814 pr_err("wrong mount options\n"); 815 goto failed; 816 } 817 if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) { 818 if (!silent) 819 pr_err("You didn't specify the type of your ufs filesystem\n\n" 820 "mount -t ufs -o ufstype=" 821 "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n" 822 ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, " 823 "default is ufstype=old\n"); 824 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD); 825 } 826 827 uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL); 828 sbi->s_uspi = uspi; 829 if (!uspi) 830 goto failed; 831 uspi->s_dirblksize = UFS_SECTOR_SIZE; 832 super_block_offset=UFS_SBLOCK; 833 834 /* Keep 2Gig file limit. Some UFS variants need to override 835 this but as I don't know which I'll let those in the know loosen 836 the rules */ 837 switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) { 838 case UFS_MOUNT_UFSTYPE_44BSD: 839 UFSD("ufstype=44bsd\n"); 840 uspi->s_fsize = block_size = 512; 841 uspi->s_fmask = ~(512 - 1); 842 uspi->s_fshift = 9; 843 uspi->s_sbsize = super_block_size = 1536; 844 uspi->s_sbbase = 0; 845 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; 846 break; 847 case UFS_MOUNT_UFSTYPE_UFS2: 848 UFSD("ufstype=ufs2\n"); 849 super_block_offset=SBLOCK_UFS2; 850 uspi->s_fsize = block_size = 512; 851 uspi->s_fmask = ~(512 - 1); 852 uspi->s_fshift = 9; 853 uspi->s_sbsize = super_block_size = 1536; 854 uspi->s_sbbase = 0; 855 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; 856 break; 857 858 case UFS_MOUNT_UFSTYPE_SUN: 859 UFSD("ufstype=sun\n"); 860 uspi->s_fsize = block_size = 1024; 861 uspi->s_fmask = ~(1024 - 1); 862 uspi->s_fshift = 10; 863 uspi->s_sbsize = super_block_size = 2048; 864 uspi->s_sbbase = 0; 865 uspi->s_maxsymlinklen = 0; /* Not supported on disk */ 866 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN; 867 break; 868 869 case UFS_MOUNT_UFSTYPE_SUNOS: 870 UFSD("ufstype=sunos\n"); 871 uspi->s_fsize = block_size = 1024; 872 uspi->s_fmask = ~(1024 - 1); 873 uspi->s_fshift = 10; 874 uspi->s_sbsize = 2048; 875 super_block_size = 2048; 876 uspi->s_sbbase = 0; 877 uspi->s_maxsymlinklen = 0; /* Not supported on disk */ 878 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_SUNOS | UFS_CG_SUN; 879 break; 880 881 case UFS_MOUNT_UFSTYPE_SUNx86: 882 UFSD("ufstype=sunx86\n"); 883 uspi->s_fsize = block_size = 1024; 884 uspi->s_fmask = ~(1024 - 1); 885 uspi->s_fshift = 10; 886 uspi->s_sbsize = super_block_size = 2048; 887 uspi->s_sbbase = 0; 888 uspi->s_maxsymlinklen = 0; /* Not supported on disk */ 889 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN; 890 break; 891 892 case UFS_MOUNT_UFSTYPE_OLD: 893 UFSD("ufstype=old\n"); 894 uspi->s_fsize = block_size = 1024; 895 uspi->s_fmask = ~(1024 - 1); 896 uspi->s_fshift = 10; 897 uspi->s_sbsize = super_block_size = 2048; 898 uspi->s_sbbase = 0; 899 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 900 if (!(sb->s_flags & MS_RDONLY)) { 901 if (!silent) 902 pr_info("ufstype=old is supported read-only\n"); 903 sb->s_flags |= MS_RDONLY; 904 } 905 break; 906 907 case UFS_MOUNT_UFSTYPE_NEXTSTEP: 908 UFSD("ufstype=nextstep\n"); 909 uspi->s_fsize = block_size = 1024; 910 uspi->s_fmask = ~(1024 - 1); 911 uspi->s_fshift = 10; 912 uspi->s_sbsize = super_block_size = 2048; 913 uspi->s_sbbase = 0; 914 uspi->s_dirblksize = 1024; 915 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 916 if (!(sb->s_flags & MS_RDONLY)) { 917 if (!silent) 918 pr_info("ufstype=nextstep is supported read-only\n"); 919 sb->s_flags |= MS_RDONLY; 920 } 921 break; 922 923 case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD: 924 UFSD("ufstype=nextstep-cd\n"); 925 uspi->s_fsize = block_size = 2048; 926 uspi->s_fmask = ~(2048 - 1); 927 uspi->s_fshift = 11; 928 uspi->s_sbsize = super_block_size = 2048; 929 uspi->s_sbbase = 0; 930 uspi->s_dirblksize = 1024; 931 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 932 if (!(sb->s_flags & MS_RDONLY)) { 933 if (!silent) 934 pr_info("ufstype=nextstep-cd is supported read-only\n"); 935 sb->s_flags |= MS_RDONLY; 936 } 937 break; 938 939 case UFS_MOUNT_UFSTYPE_OPENSTEP: 940 UFSD("ufstype=openstep\n"); 941 uspi->s_fsize = block_size = 1024; 942 uspi->s_fmask = ~(1024 - 1); 943 uspi->s_fshift = 10; 944 uspi->s_sbsize = super_block_size = 2048; 945 uspi->s_sbbase = 0; 946 uspi->s_dirblksize = 1024; 947 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; 948 if (!(sb->s_flags & MS_RDONLY)) { 949 if (!silent) 950 pr_info("ufstype=openstep is supported read-only\n"); 951 sb->s_flags |= MS_RDONLY; 952 } 953 break; 954 955 case UFS_MOUNT_UFSTYPE_HP: 956 UFSD("ufstype=hp\n"); 957 uspi->s_fsize = block_size = 1024; 958 uspi->s_fmask = ~(1024 - 1); 959 uspi->s_fshift = 10; 960 uspi->s_sbsize = super_block_size = 2048; 961 uspi->s_sbbase = 0; 962 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 963 if (!(sb->s_flags & MS_RDONLY)) { 964 if (!silent) 965 pr_info("ufstype=hp is supported read-only\n"); 966 sb->s_flags |= MS_RDONLY; 967 } 968 break; 969 default: 970 if (!silent) 971 pr_err("unknown ufstype\n"); 972 goto failed; 973 } 974 975again: 976 if (!sb_set_blocksize(sb, block_size)) { 977 pr_err("failed to set blocksize\n"); 978 goto failed; 979 } 980 981 /* 982 * read ufs super block from device 983 */ 984 985 ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size); 986 987 if (!ubh) 988 goto failed; 989 990 usb1 = ubh_get_usb_first(uspi); 991 usb2 = ubh_get_usb_second(uspi); 992 usb3 = ubh_get_usb_third(uspi); 993 994 /* Sort out mod used on SunOS 4.1.3 for fs_state */ 995 uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat); 996 if (((flags & UFS_ST_MASK) == UFS_ST_SUNOS) && 997 (uspi->s_postblformat != UFS_42POSTBLFMT)) { 998 flags &= ~UFS_ST_MASK; 999 flags |= UFS_ST_SUN; 1000 } 1001 1002 /* 1003 * Check ufs magic number 1004 */ 1005 sbi->s_bytesex = BYTESEX_LE; 1006 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) { 1007 case UFS_MAGIC: 1008 case UFS_MAGIC_BW: 1009 case UFS2_MAGIC: 1010 case UFS_MAGIC_LFN: 1011 case UFS_MAGIC_FEA: 1012 case UFS_MAGIC_4GB: 1013 goto magic_found; 1014 } 1015 sbi->s_bytesex = BYTESEX_BE; 1016 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) { 1017 case UFS_MAGIC: 1018 case UFS_MAGIC_BW: 1019 case UFS2_MAGIC: 1020 case UFS_MAGIC_LFN: 1021 case UFS_MAGIC_FEA: 1022 case UFS_MAGIC_4GB: 1023 goto magic_found; 1024 } 1025 1026 if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP) 1027 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD) 1028 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP)) 1029 && uspi->s_sbbase < 256) { 1030 ubh_brelse_uspi(uspi); 1031 ubh = NULL; 1032 uspi->s_sbbase += 8; 1033 goto again; 1034 } 1035 if (!silent) 1036 pr_err("%s(): bad magic number\n", __func__); 1037 goto failed; 1038 1039magic_found: 1040 /* 1041 * Check block and fragment sizes 1042 */ 1043 uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize); 1044 uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize); 1045 uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize); 1046 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask); 1047 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift); 1048 1049 if (!is_power_of_2(uspi->s_fsize)) { 1050 pr_err("%s(): fragment size %u is not a power of 2\n", 1051 __func__, uspi->s_fsize); 1052 goto failed; 1053 } 1054 if (uspi->s_fsize < 512) { 1055 pr_err("%s(): fragment size %u is too small\n", 1056 __func__, uspi->s_fsize); 1057 goto failed; 1058 } 1059 if (uspi->s_fsize > 4096) { 1060 pr_err("%s(): fragment size %u is too large\n", 1061 __func__, uspi->s_fsize); 1062 goto failed; 1063 } 1064 if (!is_power_of_2(uspi->s_bsize)) { 1065 pr_err("%s(): block size %u is not a power of 2\n", 1066 __func__, uspi->s_bsize); 1067 goto failed; 1068 } 1069 if (uspi->s_bsize < 4096) { 1070 pr_err("%s(): block size %u is too small\n", 1071 __func__, uspi->s_bsize); 1072 goto failed; 1073 } 1074 if (uspi->s_bsize / uspi->s_fsize > 8) { 1075 pr_err("%s(): too many fragments per block (%u)\n", 1076 __func__, uspi->s_bsize / uspi->s_fsize); 1077 goto failed; 1078 } 1079 if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) { 1080 ubh_brelse_uspi(uspi); 1081 ubh = NULL; 1082 block_size = uspi->s_fsize; 1083 super_block_size = uspi->s_sbsize; 1084 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size); 1085 goto again; 1086 } 1087 1088 sbi->s_flags = flags;/*after that line some functions use s_flags*/ 1089 ufs_print_super_stuff(sb, usb1, usb2, usb3); 1090 1091 /* 1092 * Check, if file system was correctly unmounted. 1093 * If not, make it read only. 1094 */ 1095 if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) || 1096 ((flags & UFS_ST_MASK) == UFS_ST_OLD) || 1097 (((flags & UFS_ST_MASK) == UFS_ST_SUN || 1098 (flags & UFS_ST_MASK) == UFS_ST_SUNOS || 1099 (flags & UFS_ST_MASK) == UFS_ST_SUNx86) && 1100 (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) { 1101 switch(usb1->fs_clean) { 1102 case UFS_FSCLEAN: 1103 UFSD("fs is clean\n"); 1104 break; 1105 case UFS_FSSTABLE: 1106 UFSD("fs is stable\n"); 1107 break; 1108 case UFS_FSLOG: 1109 UFSD("fs is logging fs\n"); 1110 break; 1111 case UFS_FSOSF1: 1112 UFSD("fs is DEC OSF/1\n"); 1113 break; 1114 case UFS_FSACTIVE: 1115 pr_err("%s(): fs is active\n", __func__); 1116 sb->s_flags |= MS_RDONLY; 1117 break; 1118 case UFS_FSBAD: 1119 pr_err("%s(): fs is bad\n", __func__); 1120 sb->s_flags |= MS_RDONLY; 1121 break; 1122 default: 1123 pr_err("%s(): can't grok fs_clean 0x%x\n", 1124 __func__, usb1->fs_clean); 1125 sb->s_flags |= MS_RDONLY; 1126 break; 1127 } 1128 } else { 1129 pr_err("%s(): fs needs fsck\n", __func__); 1130 sb->s_flags |= MS_RDONLY; 1131 } 1132 1133 /* 1134 * Read ufs_super_block into internal data structures 1135 */ 1136 sb->s_op = &ufs_super_ops; 1137 sb->s_export_op = &ufs_export_ops; 1138 1139 sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic); 1140 1141 uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno); 1142 uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno); 1143 uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno); 1144 uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno); 1145 uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset); 1146 uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask); 1147 1148 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { 1149 uspi->s_u2_size = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size); 1150 uspi->s_u2_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize); 1151 } else { 1152 uspi->s_size = fs32_to_cpu(sb, usb1->fs_size); 1153 uspi->s_dsize = fs32_to_cpu(sb, usb1->fs_dsize); 1154 } 1155 1156 uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg); 1157 /* s_bsize already set */ 1158 /* s_fsize already set */ 1159 uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag); 1160 uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree); 1161 uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask); 1162 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask); 1163 uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift); 1164 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift); 1165 UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift, 1166 uspi->s_fshift); 1167 uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift); 1168 uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb); 1169 /* s_sbsize already set */ 1170 uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask); 1171 uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift); 1172 uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir); 1173 uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb); 1174 uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf); 1175 uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3); 1176 uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave); 1177 uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew); 1178 1179 if (uspi->fs_magic == UFS2_MAGIC) 1180 uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr); 1181 else 1182 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr); 1183 1184 uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize); 1185 uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize); 1186 uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak); 1187 uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect); 1188 uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc); 1189 uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg); 1190 uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg); 1191 uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc); 1192 uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize); 1193 uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3); 1194 uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3); 1195 uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos); 1196 uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff); 1197 uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff); 1198 1199 /* 1200 * Compute another frequently used values 1201 */ 1202 uspi->s_fpbmask = uspi->s_fpb - 1; 1203 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) 1204 uspi->s_apbshift = uspi->s_bshift - 3; 1205 else 1206 uspi->s_apbshift = uspi->s_bshift - 2; 1207 1208 uspi->s_2apbshift = uspi->s_apbshift * 2; 1209 uspi->s_3apbshift = uspi->s_apbshift * 3; 1210 uspi->s_apb = 1 << uspi->s_apbshift; 1211 uspi->s_2apb = 1 << uspi->s_2apbshift; 1212 uspi->s_3apb = 1 << uspi->s_3apbshift; 1213 uspi->s_apbmask = uspi->s_apb - 1; 1214 uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS; 1215 uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift; 1216 uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift; 1217 uspi->s_bpf = uspi->s_fsize << 3; 1218 uspi->s_bpfshift = uspi->s_fshift + 3; 1219 uspi->s_bpfmask = uspi->s_bpf - 1; 1220 if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_44BSD || 1221 (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_UFS2) 1222 uspi->s_maxsymlinklen = 1223 fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen); 1224 1225 if (uspi->fs_magic == UFS2_MAGIC) 1226 maxsymlen = 2 * 4 * (UFS_NDADDR + UFS_NINDIR); 1227 else 1228 maxsymlen = 4 * (UFS_NDADDR + UFS_NINDIR); 1229 if (uspi->s_maxsymlinklen > maxsymlen) { 1230 ufs_warning(sb, __func__, "ufs_read_super: excessive maximum " 1231 "fast symlink size (%u)\n", uspi->s_maxsymlinklen); 1232 uspi->s_maxsymlinklen = maxsymlen; 1233 } 1234 sb->s_max_links = UFS_LINK_MAX; 1235 1236 inode = ufs_iget(sb, UFS_ROOTINO); 1237 if (IS_ERR(inode)) { 1238 ret = PTR_ERR(inode); 1239 goto failed; 1240 } 1241 sb->s_root = d_make_root(inode); 1242 if (!sb->s_root) { 1243 ret = -ENOMEM; 1244 goto failed; 1245 } 1246 1247 ufs_setup_cstotal(sb); 1248 /* 1249 * Read cylinder group structures 1250 */ 1251 if (!(sb->s_flags & MS_RDONLY)) 1252 if (!ufs_read_cylinder_structures(sb)) 1253 goto failed; 1254 1255 UFSD("EXIT\n"); 1256 return 0; 1257 1258failed: 1259 mutex_destroy(&sbi->mutex); 1260 if (ubh) 1261 ubh_brelse_uspi (uspi); 1262 kfree (uspi); 1263 kfree(sbi); 1264 sb->s_fs_info = NULL; 1265 UFSD("EXIT (FAILED)\n"); 1266 return ret; 1267 1268failed_nomem: 1269 UFSD("EXIT (NOMEM)\n"); 1270 return -ENOMEM; 1271} 1272 1273static int ufs_remount (struct super_block *sb, int *mount_flags, char *data) 1274{ 1275 struct ufs_sb_private_info * uspi; 1276 struct ufs_super_block_first * usb1; 1277 struct ufs_super_block_third * usb3; 1278 unsigned new_mount_opt, ufstype; 1279 unsigned flags; 1280 1281 sync_filesystem(sb); 1282 lock_ufs(sb); 1283 mutex_lock(&UFS_SB(sb)->s_lock); 1284 uspi = UFS_SB(sb)->s_uspi; 1285 flags = UFS_SB(sb)->s_flags; 1286 usb1 = ubh_get_usb_first(uspi); 1287 usb3 = ubh_get_usb_third(uspi); 1288 1289 /* 1290 * Allow the "check" option to be passed as a remount option. 1291 * It is not possible to change ufstype option during remount 1292 */ 1293 ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE; 1294 new_mount_opt = 0; 1295 ufs_set_opt (new_mount_opt, ONERROR_LOCK); 1296 if (!ufs_parse_options (data, &new_mount_opt)) { 1297 mutex_unlock(&UFS_SB(sb)->s_lock); 1298 unlock_ufs(sb); 1299 return -EINVAL; 1300 } 1301 if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) { 1302 new_mount_opt |= ufstype; 1303 } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) { 1304 pr_err("ufstype can't be changed during remount\n"); 1305 mutex_unlock(&UFS_SB(sb)->s_lock); 1306 unlock_ufs(sb); 1307 return -EINVAL; 1308 } 1309 1310 if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) { 1311 UFS_SB(sb)->s_mount_opt = new_mount_opt; 1312 mutex_unlock(&UFS_SB(sb)->s_lock); 1313 unlock_ufs(sb); 1314 return 0; 1315 } 1316 1317 /* 1318 * fs was mouted as rw, remounting ro 1319 */ 1320 if (*mount_flags & MS_RDONLY) { 1321 ufs_put_super_internal(sb); 1322 usb1->fs_time = cpu_to_fs32(sb, get_seconds()); 1323 if ((flags & UFS_ST_MASK) == UFS_ST_SUN 1324 || (flags & UFS_ST_MASK) == UFS_ST_SUNOS 1325 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86) 1326 ufs_set_fs_state(sb, usb1, usb3, 1327 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time)); 1328 ubh_mark_buffer_dirty (USPI_UBH(uspi)); 1329 sb->s_flags |= MS_RDONLY; 1330 } else { 1331 /* 1332 * fs was mounted as ro, remounting rw 1333 */ 1334#ifndef CONFIG_UFS_FS_WRITE 1335 pr_err("ufs was compiled with read-only support, can't be mounted as read-write\n"); 1336 mutex_unlock(&UFS_SB(sb)->s_lock); 1337 unlock_ufs(sb); 1338 return -EINVAL; 1339#else 1340 if (ufstype != UFS_MOUNT_UFSTYPE_SUN && 1341 ufstype != UFS_MOUNT_UFSTYPE_SUNOS && 1342 ufstype != UFS_MOUNT_UFSTYPE_44BSD && 1343 ufstype != UFS_MOUNT_UFSTYPE_SUNx86 && 1344 ufstype != UFS_MOUNT_UFSTYPE_UFS2) { 1345 pr_err("this ufstype is read-only supported\n"); 1346 mutex_unlock(&UFS_SB(sb)->s_lock); 1347 unlock_ufs(sb); 1348 return -EINVAL; 1349 } 1350 if (!ufs_read_cylinder_structures(sb)) { 1351 pr_err("failed during remounting\n"); 1352 mutex_unlock(&UFS_SB(sb)->s_lock); 1353 unlock_ufs(sb); 1354 return -EPERM; 1355 } 1356 sb->s_flags &= ~MS_RDONLY; 1357#endif 1358 } 1359 UFS_SB(sb)->s_mount_opt = new_mount_opt; 1360 mutex_unlock(&UFS_SB(sb)->s_lock); 1361 unlock_ufs(sb); 1362 return 0; 1363} 1364 1365static int ufs_show_options(struct seq_file *seq, struct dentry *root) 1366{ 1367 struct ufs_sb_info *sbi = UFS_SB(root->d_sb); 1368 unsigned mval = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE; 1369 const struct match_token *tp = tokens; 1370 1371 while (tp->token != Opt_onerror_panic && tp->token != mval) 1372 ++tp; 1373 BUG_ON(tp->token == Opt_onerror_panic); 1374 seq_printf(seq, ",%s", tp->pattern); 1375 1376 mval = sbi->s_mount_opt & UFS_MOUNT_ONERROR; 1377 while (tp->token != Opt_err && tp->token != mval) 1378 ++tp; 1379 BUG_ON(tp->token == Opt_err); 1380 seq_printf(seq, ",%s", tp->pattern); 1381 1382 return 0; 1383} 1384 1385static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf) 1386{ 1387 struct super_block *sb = dentry->d_sb; 1388 struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi; 1389 unsigned flags = UFS_SB(sb)->s_flags; 1390 struct ufs_super_block_third *usb3; 1391 u64 id = huge_encode_dev(sb->s_bdev->bd_dev); 1392 1393 lock_ufs(sb); 1394 1395 usb3 = ubh_get_usb_third(uspi); 1396 1397 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { 1398 buf->f_type = UFS2_MAGIC; 1399 buf->f_blocks = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize); 1400 } else { 1401 buf->f_type = UFS_MAGIC; 1402 buf->f_blocks = uspi->s_dsize; 1403 } 1404 buf->f_bfree = ufs_blkstofrags(uspi->cs_total.cs_nbfree) + 1405 uspi->cs_total.cs_nffree; 1406 buf->f_ffree = uspi->cs_total.cs_nifree; 1407 buf->f_bsize = sb->s_blocksize; 1408 buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree)) 1409 ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0; 1410 buf->f_files = uspi->s_ncg * uspi->s_ipg; 1411 buf->f_namelen = UFS_MAXNAMLEN; 1412 buf->f_fsid.val[0] = (u32)id; 1413 buf->f_fsid.val[1] = (u32)(id >> 32); 1414 1415 unlock_ufs(sb); 1416 1417 return 0; 1418} 1419 1420static struct kmem_cache * ufs_inode_cachep; 1421 1422static struct inode *ufs_alloc_inode(struct super_block *sb) 1423{ 1424 struct ufs_inode_info *ei; 1425 1426 ei = kmem_cache_alloc(ufs_inode_cachep, GFP_NOFS); 1427 if (!ei) 1428 return NULL; 1429 1430 ei->vfs_inode.i_version = 1; 1431 return &ei->vfs_inode; 1432} 1433 1434static void ufs_i_callback(struct rcu_head *head) 1435{ 1436 struct inode *inode = container_of(head, struct inode, i_rcu); 1437 kmem_cache_free(ufs_inode_cachep, UFS_I(inode)); 1438} 1439 1440static void ufs_destroy_inode(struct inode *inode) 1441{ 1442 call_rcu(&inode->i_rcu, ufs_i_callback); 1443} 1444 1445static void init_once(void *foo) 1446{ 1447 struct ufs_inode_info *ei = (struct ufs_inode_info *) foo; 1448 1449 inode_init_once(&ei->vfs_inode); 1450} 1451 1452static int __init init_inodecache(void) 1453{ 1454 ufs_inode_cachep = kmem_cache_create("ufs_inode_cache", 1455 sizeof(struct ufs_inode_info), 1456 0, (SLAB_RECLAIM_ACCOUNT| 1457 SLAB_MEM_SPREAD), 1458 init_once); 1459 if (ufs_inode_cachep == NULL) 1460 return -ENOMEM; 1461 return 0; 1462} 1463 1464static void destroy_inodecache(void) 1465{ 1466 /* 1467 * Make sure all delayed rcu free inodes are flushed before we 1468 * destroy cache. 1469 */ 1470 rcu_barrier(); 1471 kmem_cache_destroy(ufs_inode_cachep); 1472} 1473 1474static const struct super_operations ufs_super_ops = { 1475 .alloc_inode = ufs_alloc_inode, 1476 .destroy_inode = ufs_destroy_inode, 1477 .write_inode = ufs_write_inode, 1478 .evict_inode = ufs_evict_inode, 1479 .put_super = ufs_put_super, 1480 .sync_fs = ufs_sync_fs, 1481 .statfs = ufs_statfs, 1482 .remount_fs = ufs_remount, 1483 .show_options = ufs_show_options, 1484}; 1485 1486static struct dentry *ufs_mount(struct file_system_type *fs_type, 1487 int flags, const char *dev_name, void *data) 1488{ 1489 return mount_bdev(fs_type, flags, dev_name, data, ufs_fill_super); 1490} 1491 1492static struct file_system_type ufs_fs_type = { 1493 .owner = THIS_MODULE, 1494 .name = "ufs", 1495 .mount = ufs_mount, 1496 .kill_sb = kill_block_super, 1497 .fs_flags = FS_REQUIRES_DEV, 1498}; 1499MODULE_ALIAS_FS("ufs"); 1500 1501static int __init init_ufs_fs(void) 1502{ 1503 int err = init_inodecache(); 1504 if (err) 1505 goto out1; 1506 err = register_filesystem(&ufs_fs_type); 1507 if (err) 1508 goto out; 1509 return 0; 1510out: 1511 destroy_inodecache(); 1512out1: 1513 return err; 1514} 1515 1516static void __exit exit_ufs_fs(void) 1517{ 1518 unregister_filesystem(&ufs_fs_type); 1519 destroy_inodecache(); 1520} 1521 1522module_init(init_ufs_fs) 1523module_exit(exit_ufs_fs) 1524MODULE_LICENSE("GPL"); 1525