1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * linux/fs/ufs/super.c 4 * 5 * Copyright (C) 1998 6 * Daniel Pirkl <daniel.pirkl@email.cz> 7 * Charles University, Faculty of Mathematics and Physics 8 */ 9 10 /* Derived from 11 * 12 * linux/fs/ext2/super.c 13 * 14 * Copyright (C) 1992, 1993, 1994, 1995 15 * Remy Card (card@masi.ibp.fr) 16 * Laboratoire MASI - Institut Blaise Pascal 17 * Universite Pierre et Marie Curie (Paris VI) 18 * 19 * from 20 * 21 * linux/fs/minix/inode.c 22 * 23 * Copyright (C) 1991, 1992 Linus Torvalds 24 * 25 * Big-endian to little-endian byte-swapping/bitmaps by 26 * David S. Miller (davem@caip.rutgers.edu), 1995 27 */ 28 29 /* 30 * Inspired by 31 * 32 * linux/fs/ufs/super.c 33 * 34 * Copyright (C) 1996 35 * Adrian Rodriguez (adrian@franklins-tower.rutgers.edu) 36 * Laboratory for Computer Science Research Computing Facility 37 * Rutgers, The State University of New Jersey 38 * 39 * Copyright (C) 1996 Eddie C. Dost (ecd@skynet.be) 40 * 41 * Kernel module support added on 96/04/26 by 42 * Stefan Reinauer <stepan@home.culture.mipt.ru> 43 * 44 * Module usage counts added on 96/04/29 by 45 * Gertjan van Wingerde <gwingerde@gmail.com> 46 * 47 * Clean swab support on 19970406 by 48 * Francois-Rene Rideau <fare@tunes.org> 49 * 50 * 4.4BSD (FreeBSD) support added on February 1st 1998 by 51 * Niels Kristian Bech Jensen <nkbj@image.dk> partially based 52 * on code by Martin von Loewis <martin@mira.isdn.cs.tu-berlin.de>. 53 * 54 * NeXTstep support added on February 5th 1998 by 55 * Niels Kristian Bech Jensen <nkbj@image.dk>. 56 * 57 * write support Daniel Pirkl <daniel.pirkl@email.cz> 1998 58 * 59 * HP/UX hfs filesystem support added by 60 * Martin K. Petersen <mkp@mkp.net>, August 1999 61 * 62 * UFS2 (of FreeBSD 5.x) support added by 63 * Niraj Kumar <niraj17@iitbombay.org>, Jan 2004 64 * 65 * UFS2 write support added by 66 * Evgeniy Dushistov <dushistov@mail.ru>, 2007 67 */ 68 69 #include <linux/exportfs.h> 70 #include <linux/module.h> 71 #include <linux/bitops.h> 72 73 #include <linux/stdarg.h> 74 75 #include <linux/uaccess.h> 76 77 #include <linux/errno.h> 78 #include <linux/fs.h> 79 #include <linux/slab.h> 80 #include <linux/time.h> 81 #include <linux/stat.h> 82 #include <linux/string.h> 83 #include <linux/blkdev.h> 84 #include <linux/backing-dev.h> 85 #include <linux/init.h> 86 #include <linux/parser.h> 87 #include <linux/buffer_head.h> 88 #include <linux/vfs.h> 89 #include <linux/log2.h> 90 #include <linux/mount.h> 91 #include <linux/seq_file.h> 92 #include <linux/iversion.h> 93 94 #include "ufs_fs.h" 95 #include "ufs.h" 96 #include "swab.h" 97 #include "util.h" 98 99 static struct inode *ufs_nfs_get_inode(struct super_block *sb, u64 ino, u32 generation) 100 { 101 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 102 struct inode *inode; 103 104 if (ino < UFS_ROOTINO || ino > (u64)uspi->s_ncg * uspi->s_ipg) 105 return ERR_PTR(-ESTALE); 106 107 inode = ufs_iget(sb, ino); 108 if (IS_ERR(inode)) 109 return ERR_CAST(inode); 110 if (generation && inode->i_generation != generation) { 111 iput(inode); 112 return ERR_PTR(-ESTALE); 113 } 114 return inode; 115 } 116 117 static struct dentry *ufs_fh_to_dentry(struct super_block *sb, struct fid *fid, 118 int fh_len, int fh_type) 119 { 120 return generic_fh_to_dentry(sb, fid, fh_len, fh_type, ufs_nfs_get_inode); 121 } 122 123 static struct dentry *ufs_fh_to_parent(struct super_block *sb, struct fid *fid, 124 int fh_len, int fh_type) 125 { 126 return generic_fh_to_parent(sb, fid, fh_len, fh_type, ufs_nfs_get_inode); 127 } 128 129 static struct dentry *ufs_get_parent(struct dentry *child) 130 { 131 ino_t ino; 132 133 ino = ufs_inode_by_name(d_inode(child), &dotdot_name); 134 if (!ino) 135 return ERR_PTR(-ENOENT); 136 return d_obtain_alias(ufs_iget(child->d_sb, ino)); 137 } 138 139 static const struct export_operations ufs_export_ops = { 140 .encode_fh = generic_encode_ino32_fh, 141 .fh_to_dentry = ufs_fh_to_dentry, 142 .fh_to_parent = ufs_fh_to_parent, 143 .get_parent = ufs_get_parent, 144 }; 145 146 #ifdef CONFIG_UFS_DEBUG 147 /* 148 * Print contents of ufs_super_block, useful for debugging 149 */ 150 static void ufs_print_super_stuff(struct super_block *sb, 151 struct ufs_super_block_first *usb1, 152 struct ufs_super_block_second *usb2, 153 struct ufs_super_block_third *usb3) 154 { 155 u32 magic = fs32_to_cpu(sb, usb3->fs_magic); 156 157 pr_debug("ufs_print_super_stuff\n"); 158 pr_debug(" magic: 0x%x\n", magic); 159 if (fs32_to_cpu(sb, usb3->fs_magic) == UFS2_MAGIC) { 160 pr_debug(" fs_size: %llu\n", (unsigned long long) 161 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size)); 162 pr_debug(" fs_dsize: %llu\n", (unsigned long long) 163 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize)); 164 pr_debug(" bsize: %u\n", 165 fs32_to_cpu(sb, usb1->fs_bsize)); 166 pr_debug(" fsize: %u\n", 167 fs32_to_cpu(sb, usb1->fs_fsize)); 168 pr_debug(" fs_volname: %s\n", usb2->fs_un.fs_u2.fs_volname); 169 pr_debug(" fs_sblockloc: %llu\n", (unsigned long long) 170 fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc)); 171 pr_debug(" cs_ndir(No of dirs): %llu\n", (unsigned long long) 172 fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir)); 173 pr_debug(" cs_nbfree(No of free blocks): %llu\n", 174 (unsigned long long) 175 fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree)); 176 pr_info(" cs_nifree(Num of free inodes): %llu\n", 177 (unsigned long long) 178 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree)); 179 pr_info(" cs_nffree(Num of free frags): %llu\n", 180 (unsigned long long) 181 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree)); 182 pr_info(" fs_maxsymlinklen: %u\n", 183 fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen)); 184 } else { 185 pr_debug(" sblkno: %u\n", fs32_to_cpu(sb, usb1->fs_sblkno)); 186 pr_debug(" cblkno: %u\n", fs32_to_cpu(sb, usb1->fs_cblkno)); 187 pr_debug(" iblkno: %u\n", fs32_to_cpu(sb, usb1->fs_iblkno)); 188 pr_debug(" dblkno: %u\n", fs32_to_cpu(sb, usb1->fs_dblkno)); 189 pr_debug(" cgoffset: %u\n", 190 fs32_to_cpu(sb, usb1->fs_cgoffset)); 191 pr_debug(" ~cgmask: 0x%x\n", 192 ~fs32_to_cpu(sb, usb1->fs_cgmask)); 193 pr_debug(" size: %u\n", fs32_to_cpu(sb, usb1->fs_size)); 194 pr_debug(" dsize: %u\n", fs32_to_cpu(sb, usb1->fs_dsize)); 195 pr_debug(" ncg: %u\n", fs32_to_cpu(sb, usb1->fs_ncg)); 196 pr_debug(" bsize: %u\n", fs32_to_cpu(sb, usb1->fs_bsize)); 197 pr_debug(" fsize: %u\n", fs32_to_cpu(sb, usb1->fs_fsize)); 198 pr_debug(" frag: %u\n", fs32_to_cpu(sb, usb1->fs_frag)); 199 pr_debug(" fragshift: %u\n", 200 fs32_to_cpu(sb, usb1->fs_fragshift)); 201 pr_debug(" ~fmask: %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask)); 202 pr_debug(" fshift: %u\n", fs32_to_cpu(sb, usb1->fs_fshift)); 203 pr_debug(" sbsize: %u\n", fs32_to_cpu(sb, usb1->fs_sbsize)); 204 pr_debug(" spc: %u\n", fs32_to_cpu(sb, usb1->fs_spc)); 205 pr_debug(" cpg: %u\n", fs32_to_cpu(sb, usb1->fs_cpg)); 206 pr_debug(" ipg: %u\n", fs32_to_cpu(sb, usb1->fs_ipg)); 207 pr_debug(" fpg: %u\n", fs32_to_cpu(sb, usb1->fs_fpg)); 208 pr_debug(" csaddr: %u\n", fs32_to_cpu(sb, usb1->fs_csaddr)); 209 pr_debug(" cssize: %u\n", fs32_to_cpu(sb, usb1->fs_cssize)); 210 pr_debug(" cgsize: %u\n", fs32_to_cpu(sb, usb1->fs_cgsize)); 211 pr_debug(" fstodb: %u\n", 212 fs32_to_cpu(sb, usb1->fs_fsbtodb)); 213 pr_debug(" nrpos: %u\n", fs32_to_cpu(sb, usb3->fs_nrpos)); 214 pr_debug(" ndir %u\n", 215 fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir)); 216 pr_debug(" nifree %u\n", 217 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree)); 218 pr_debug(" nbfree %u\n", 219 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree)); 220 pr_debug(" nffree %u\n", 221 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree)); 222 } 223 pr_debug("\n"); 224 } 225 226 /* 227 * Print contents of ufs_cylinder_group, useful for debugging 228 */ 229 static void ufs_print_cylinder_stuff(struct super_block *sb, 230 struct ufs_cylinder_group *cg) 231 { 232 pr_debug("\nufs_print_cylinder_stuff\n"); 233 pr_debug("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group)); 234 pr_debug(" magic: %x\n", fs32_to_cpu(sb, cg->cg_magic)); 235 pr_debug(" time: %u\n", fs32_to_cpu(sb, cg->cg_time)); 236 pr_debug(" cgx: %u\n", fs32_to_cpu(sb, cg->cg_cgx)); 237 pr_debug(" ncyl: %u\n", fs16_to_cpu(sb, cg->cg_ncyl)); 238 pr_debug(" niblk: %u\n", fs16_to_cpu(sb, cg->cg_niblk)); 239 pr_debug(" ndblk: %u\n", fs32_to_cpu(sb, cg->cg_ndblk)); 240 pr_debug(" cs_ndir: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir)); 241 pr_debug(" cs_nbfree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree)); 242 pr_debug(" cs_nifree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree)); 243 pr_debug(" cs_nffree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree)); 244 pr_debug(" rotor: %u\n", fs32_to_cpu(sb, cg->cg_rotor)); 245 pr_debug(" frotor: %u\n", fs32_to_cpu(sb, cg->cg_frotor)); 246 pr_debug(" irotor: %u\n", fs32_to_cpu(sb, cg->cg_irotor)); 247 pr_debug(" frsum: %u, %u, %u, %u, %u, %u, %u, %u\n", 248 fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]), 249 fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]), 250 fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]), 251 fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7])); 252 pr_debug(" btotoff: %u\n", fs32_to_cpu(sb, cg->cg_btotoff)); 253 pr_debug(" boff: %u\n", fs32_to_cpu(sb, cg->cg_boff)); 254 pr_debug(" iuseoff: %u\n", fs32_to_cpu(sb, cg->cg_iusedoff)); 255 pr_debug(" freeoff: %u\n", fs32_to_cpu(sb, cg->cg_freeoff)); 256 pr_debug(" nextfreeoff: %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff)); 257 pr_debug(" clustersumoff %u\n", 258 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff)); 259 pr_debug(" clusteroff %u\n", 260 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff)); 261 pr_debug(" nclusterblks %u\n", 262 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks)); 263 pr_debug("\n"); 264 } 265 #else 266 # define ufs_print_super_stuff(sb, usb1, usb2, usb3) /**/ 267 # define ufs_print_cylinder_stuff(sb, cg) /**/ 268 #endif /* CONFIG_UFS_DEBUG */ 269 270 static const struct super_operations ufs_super_ops; 271 272 void ufs_error (struct super_block * sb, const char * function, 273 const char * fmt, ...) 274 { 275 struct ufs_sb_private_info * uspi; 276 struct ufs_super_block_first * usb1; 277 struct va_format vaf; 278 va_list args; 279 280 uspi = UFS_SB(sb)->s_uspi; 281 usb1 = ubh_get_usb_first(uspi); 282 283 if (!sb_rdonly(sb)) { 284 usb1->fs_clean = UFS_FSBAD; 285 ubh_mark_buffer_dirty(USPI_UBH(uspi)); 286 ufs_mark_sb_dirty(sb); 287 sb->s_flags |= SB_RDONLY; 288 } 289 va_start(args, fmt); 290 vaf.fmt = fmt; 291 vaf.va = &args; 292 switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) { 293 case UFS_MOUNT_ONERROR_PANIC: 294 panic("panic (device %s): %s: %pV\n", 295 sb->s_id, function, &vaf); 296 297 case UFS_MOUNT_ONERROR_LOCK: 298 case UFS_MOUNT_ONERROR_UMOUNT: 299 case UFS_MOUNT_ONERROR_REPAIR: 300 pr_crit("error (device %s): %s: %pV\n", 301 sb->s_id, function, &vaf); 302 } 303 va_end(args); 304 } 305 306 void ufs_panic (struct super_block * sb, const char * function, 307 const char * fmt, ...) 308 { 309 struct ufs_sb_private_info * uspi; 310 struct ufs_super_block_first * usb1; 311 struct va_format vaf; 312 va_list args; 313 314 uspi = UFS_SB(sb)->s_uspi; 315 usb1 = ubh_get_usb_first(uspi); 316 317 if (!sb_rdonly(sb)) { 318 usb1->fs_clean = UFS_FSBAD; 319 ubh_mark_buffer_dirty(USPI_UBH(uspi)); 320 ufs_mark_sb_dirty(sb); 321 } 322 va_start(args, fmt); 323 vaf.fmt = fmt; 324 vaf.va = &args; 325 sb->s_flags |= SB_RDONLY; 326 pr_crit("panic (device %s): %s: %pV\n", 327 sb->s_id, function, &vaf); 328 va_end(args); 329 } 330 331 void ufs_warning (struct super_block * sb, const char * function, 332 const char * fmt, ...) 333 { 334 struct va_format vaf; 335 va_list args; 336 337 va_start(args, fmt); 338 vaf.fmt = fmt; 339 vaf.va = &args; 340 pr_warn("(device %s): %s: %pV\n", 341 sb->s_id, function, &vaf); 342 va_end(args); 343 } 344 345 enum { 346 Opt_type_old = UFS_MOUNT_UFSTYPE_OLD, 347 Opt_type_sunx86 = UFS_MOUNT_UFSTYPE_SUNx86, 348 Opt_type_sun = UFS_MOUNT_UFSTYPE_SUN, 349 Opt_type_sunos = UFS_MOUNT_UFSTYPE_SUNOS, 350 Opt_type_44bsd = UFS_MOUNT_UFSTYPE_44BSD, 351 Opt_type_ufs2 = UFS_MOUNT_UFSTYPE_UFS2, 352 Opt_type_hp = UFS_MOUNT_UFSTYPE_HP, 353 Opt_type_nextstepcd = UFS_MOUNT_UFSTYPE_NEXTSTEP_CD, 354 Opt_type_nextstep = UFS_MOUNT_UFSTYPE_NEXTSTEP, 355 Opt_type_openstep = UFS_MOUNT_UFSTYPE_OPENSTEP, 356 Opt_onerror_panic = UFS_MOUNT_ONERROR_PANIC, 357 Opt_onerror_lock = UFS_MOUNT_ONERROR_LOCK, 358 Opt_onerror_umount = UFS_MOUNT_ONERROR_UMOUNT, 359 Opt_onerror_repair = UFS_MOUNT_ONERROR_REPAIR, 360 Opt_err 361 }; 362 363 static const match_table_t tokens = { 364 {Opt_type_old, "ufstype=old"}, 365 {Opt_type_sunx86, "ufstype=sunx86"}, 366 {Opt_type_sun, "ufstype=sun"}, 367 {Opt_type_sunos, "ufstype=sunos"}, 368 {Opt_type_44bsd, "ufstype=44bsd"}, 369 {Opt_type_ufs2, "ufstype=ufs2"}, 370 {Opt_type_ufs2, "ufstype=5xbsd"}, 371 {Opt_type_hp, "ufstype=hp"}, 372 {Opt_type_nextstepcd, "ufstype=nextstep-cd"}, 373 {Opt_type_nextstep, "ufstype=nextstep"}, 374 {Opt_type_openstep, "ufstype=openstep"}, 375 /*end of possible ufs types */ 376 {Opt_onerror_panic, "onerror=panic"}, 377 {Opt_onerror_lock, "onerror=lock"}, 378 {Opt_onerror_umount, "onerror=umount"}, 379 {Opt_onerror_repair, "onerror=repair"}, 380 {Opt_err, NULL} 381 }; 382 383 static int ufs_parse_options (char * options, unsigned * mount_options) 384 { 385 char * p; 386 387 UFSD("ENTER\n"); 388 389 if (!options) 390 return 1; 391 392 while ((p = strsep(&options, ",")) != NULL) { 393 substring_t args[MAX_OPT_ARGS]; 394 int token; 395 if (!*p) 396 continue; 397 398 token = match_token(p, tokens, args); 399 switch (token) { 400 case Opt_type_old: 401 ufs_clear_opt (*mount_options, UFSTYPE); 402 ufs_set_opt (*mount_options, UFSTYPE_OLD); 403 break; 404 case Opt_type_sunx86: 405 ufs_clear_opt (*mount_options, UFSTYPE); 406 ufs_set_opt (*mount_options, UFSTYPE_SUNx86); 407 break; 408 case Opt_type_sun: 409 ufs_clear_opt (*mount_options, UFSTYPE); 410 ufs_set_opt (*mount_options, UFSTYPE_SUN); 411 break; 412 case Opt_type_sunos: 413 ufs_clear_opt(*mount_options, UFSTYPE); 414 ufs_set_opt(*mount_options, UFSTYPE_SUNOS); 415 break; 416 case Opt_type_44bsd: 417 ufs_clear_opt (*mount_options, UFSTYPE); 418 ufs_set_opt (*mount_options, UFSTYPE_44BSD); 419 break; 420 case Opt_type_ufs2: 421 ufs_clear_opt(*mount_options, UFSTYPE); 422 ufs_set_opt(*mount_options, UFSTYPE_UFS2); 423 break; 424 case Opt_type_hp: 425 ufs_clear_opt (*mount_options, UFSTYPE); 426 ufs_set_opt (*mount_options, UFSTYPE_HP); 427 break; 428 case Opt_type_nextstepcd: 429 ufs_clear_opt (*mount_options, UFSTYPE); 430 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD); 431 break; 432 case Opt_type_nextstep: 433 ufs_clear_opt (*mount_options, UFSTYPE); 434 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP); 435 break; 436 case Opt_type_openstep: 437 ufs_clear_opt (*mount_options, UFSTYPE); 438 ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP); 439 break; 440 case Opt_onerror_panic: 441 ufs_clear_opt (*mount_options, ONERROR); 442 ufs_set_opt (*mount_options, ONERROR_PANIC); 443 break; 444 case Opt_onerror_lock: 445 ufs_clear_opt (*mount_options, ONERROR); 446 ufs_set_opt (*mount_options, ONERROR_LOCK); 447 break; 448 case Opt_onerror_umount: 449 ufs_clear_opt (*mount_options, ONERROR); 450 ufs_set_opt (*mount_options, ONERROR_UMOUNT); 451 break; 452 case Opt_onerror_repair: 453 pr_err("Unable to do repair on error, will lock lock instead\n"); 454 ufs_clear_opt (*mount_options, ONERROR); 455 ufs_set_opt (*mount_options, ONERROR_REPAIR); 456 break; 457 default: 458 pr_err("Invalid option: \"%s\" or missing value\n", p); 459 return 0; 460 } 461 } 462 return 1; 463 } 464 465 /* 466 * Different types of UFS hold fs_cstotal in different 467 * places, and use different data structure for it. 468 * To make things simpler we just copy fs_cstotal to ufs_sb_private_info 469 */ 470 static void ufs_setup_cstotal(struct super_block *sb) 471 { 472 struct ufs_sb_info *sbi = UFS_SB(sb); 473 struct ufs_sb_private_info *uspi = sbi->s_uspi; 474 struct ufs_super_block_first *usb1; 475 struct ufs_super_block_second *usb2; 476 struct ufs_super_block_third *usb3; 477 unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE; 478 479 UFSD("ENTER, mtype=%u\n", mtype); 480 usb1 = ubh_get_usb_first(uspi); 481 usb2 = ubh_get_usb_second(uspi); 482 usb3 = ubh_get_usb_third(uspi); 483 484 if ((mtype == UFS_MOUNT_UFSTYPE_44BSD && 485 (usb2->fs_un.fs_u2.fs_maxbsize == usb1->fs_bsize)) || 486 mtype == UFS_MOUNT_UFSTYPE_UFS2) { 487 /*we have statistic in different place, then usual*/ 488 uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir); 489 uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree); 490 uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree); 491 uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree); 492 } else { 493 uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir); 494 uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree); 495 uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree); 496 uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree); 497 } 498 UFSD("EXIT\n"); 499 } 500 501 /* 502 * Read on-disk structures associated with cylinder groups 503 */ 504 static int ufs_read_cylinder_structures(struct super_block *sb) 505 { 506 struct ufs_sb_info *sbi = UFS_SB(sb); 507 struct ufs_sb_private_info *uspi = sbi->s_uspi; 508 unsigned char * base, * space; 509 unsigned size, blks, i; 510 511 UFSD("ENTER\n"); 512 513 /* 514 * Read cs structures from (usually) first data block 515 * on the device. 516 */ 517 size = uspi->s_cssize; 518 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift; 519 base = space = kmalloc(size, GFP_NOFS); 520 if (!base) 521 goto failed; 522 sbi->s_csp = (struct ufs_csum *)space; 523 for (i = 0; i < blks; i++) { 524 struct buffer_head *bh = sb_bread(sb, uspi->s_csaddr + i); 525 if (!bh) 526 goto failed; 527 memcpy(space, bh->b_data, uspi->s_fsize); 528 space += uspi->s_fsize; 529 brelse (bh); 530 } 531 532 /* 533 * Read cylinder group (we read only first fragment from block 534 * at this time) and prepare internal data structures for cg caching. 535 */ 536 sbi->s_ucg = kmalloc_array(uspi->s_ncg, sizeof(struct buffer_head *), 537 GFP_NOFS); 538 if (!sbi->s_ucg) 539 goto failed; 540 for (i = 0; i < uspi->s_ncg; i++) 541 sbi->s_ucg[i] = NULL; 542 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) { 543 sbi->s_ucpi[i] = NULL; 544 sbi->s_cgno[i] = UFS_CGNO_EMPTY; 545 } 546 for (i = 0; i < uspi->s_ncg; i++) { 547 UFSD("read cg %u\n", i); 548 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i)))) 549 goto failed; 550 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data)) 551 goto failed; 552 553 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data); 554 } 555 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) { 556 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_NOFS))) 557 goto failed; 558 sbi->s_cgno[i] = UFS_CGNO_EMPTY; 559 } 560 sbi->s_cg_loaded = 0; 561 UFSD("EXIT\n"); 562 return 1; 563 564 failed: 565 kfree (base); 566 if (sbi->s_ucg) { 567 for (i = 0; i < uspi->s_ncg; i++) 568 if (sbi->s_ucg[i]) 569 brelse (sbi->s_ucg[i]); 570 kfree (sbi->s_ucg); 571 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) 572 kfree (sbi->s_ucpi[i]); 573 } 574 UFSD("EXIT (FAILED)\n"); 575 return 0; 576 } 577 578 /* 579 * Sync our internal copy of fs_cstotal with disk 580 */ 581 static void ufs_put_cstotal(struct super_block *sb) 582 { 583 unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE; 584 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 585 struct ufs_super_block_first *usb1; 586 struct ufs_super_block_second *usb2; 587 struct ufs_super_block_third *usb3; 588 589 UFSD("ENTER\n"); 590 usb1 = ubh_get_usb_first(uspi); 591 usb2 = ubh_get_usb_second(uspi); 592 usb3 = ubh_get_usb_third(uspi); 593 594 if (mtype == UFS_MOUNT_UFSTYPE_UFS2) { 595 /*we have statistic in different place, then usual*/ 596 usb2->fs_un.fs_u2.cs_ndir = 597 cpu_to_fs64(sb, uspi->cs_total.cs_ndir); 598 usb2->fs_un.fs_u2.cs_nbfree = 599 cpu_to_fs64(sb, uspi->cs_total.cs_nbfree); 600 usb3->fs_un1.fs_u2.cs_nifree = 601 cpu_to_fs64(sb, uspi->cs_total.cs_nifree); 602 usb3->fs_un1.fs_u2.cs_nffree = 603 cpu_to_fs64(sb, uspi->cs_total.cs_nffree); 604 goto out; 605 } 606 607 if (mtype == UFS_MOUNT_UFSTYPE_44BSD && 608 (usb2->fs_un.fs_u2.fs_maxbsize == usb1->fs_bsize)) { 609 /* store stats in both old and new places */ 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 } 619 usb1->fs_cstotal.cs_ndir = cpu_to_fs32(sb, uspi->cs_total.cs_ndir); 620 usb1->fs_cstotal.cs_nbfree = cpu_to_fs32(sb, uspi->cs_total.cs_nbfree); 621 usb1->fs_cstotal.cs_nifree = cpu_to_fs32(sb, uspi->cs_total.cs_nifree); 622 usb1->fs_cstotal.cs_nffree = cpu_to_fs32(sb, uspi->cs_total.cs_nffree); 623 out: 624 ubh_mark_buffer_dirty(USPI_UBH(uspi)); 625 ufs_print_super_stuff(sb, usb1, usb2, usb3); 626 UFSD("EXIT\n"); 627 } 628 629 /** 630 * ufs_put_super_internal() - put on-disk intrenal structures 631 * @sb: pointer to super_block structure 632 * Put on-disk structures associated with cylinder groups 633 * and write them back to disk, also update cs_total on disk 634 */ 635 static void ufs_put_super_internal(struct super_block *sb) 636 { 637 struct ufs_sb_info *sbi = UFS_SB(sb); 638 struct ufs_sb_private_info *uspi = sbi->s_uspi; 639 unsigned char * base, * space; 640 unsigned blks, size, i; 641 642 643 UFSD("ENTER\n"); 644 645 ufs_put_cstotal(sb); 646 size = uspi->s_cssize; 647 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift; 648 base = space = (char*) sbi->s_csp; 649 for (i = 0; i < blks; i++, space += uspi->s_fsize) { 650 struct buffer_head *bh = sb_bread(sb, uspi->s_csaddr + i); 651 652 if (unlikely(!bh)) { // better than an oops... 653 ufs_panic(sb, __func__, 654 "can't write part of cylinder group summary"); 655 continue; 656 } 657 memcpy(bh->b_data, space, uspi->s_fsize); 658 mark_buffer_dirty(bh); 659 brelse(bh); 660 } 661 for (i = 0; i < sbi->s_cg_loaded; i++) { 662 ufs_put_cylinder (sb, i); 663 kfree (sbi->s_ucpi[i]); 664 } 665 for (; i < UFS_MAX_GROUP_LOADED; i++) 666 kfree (sbi->s_ucpi[i]); 667 for (i = 0; i < uspi->s_ncg; i++) 668 brelse (sbi->s_ucg[i]); 669 kfree (sbi->s_ucg); 670 kfree (base); 671 672 UFSD("EXIT\n"); 673 } 674 675 static int ufs_sync_fs(struct super_block *sb, int wait) 676 { 677 struct ufs_sb_private_info * uspi; 678 struct ufs_super_block_first * usb1; 679 struct ufs_super_block_third * usb3; 680 unsigned flags; 681 682 mutex_lock(&UFS_SB(sb)->s_lock); 683 684 UFSD("ENTER\n"); 685 686 flags = UFS_SB(sb)->s_flags; 687 uspi = UFS_SB(sb)->s_uspi; 688 usb1 = ubh_get_usb_first(uspi); 689 usb3 = ubh_get_usb_third(uspi); 690 691 usb1->fs_time = ufs_get_seconds(sb); 692 if ((flags & UFS_ST_MASK) == UFS_ST_SUN || 693 (flags & UFS_ST_MASK) == UFS_ST_SUNOS || 694 (flags & UFS_ST_MASK) == UFS_ST_SUNx86) 695 ufs_set_fs_state(sb, usb1, usb3, 696 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time)); 697 ufs_put_cstotal(sb); 698 699 UFSD("EXIT\n"); 700 mutex_unlock(&UFS_SB(sb)->s_lock); 701 702 return 0; 703 } 704 705 static void delayed_sync_fs(struct work_struct *work) 706 { 707 struct ufs_sb_info *sbi; 708 709 sbi = container_of(work, struct ufs_sb_info, sync_work.work); 710 711 spin_lock(&sbi->work_lock); 712 sbi->work_queued = 0; 713 spin_unlock(&sbi->work_lock); 714 715 ufs_sync_fs(sbi->sb, 1); 716 } 717 718 void ufs_mark_sb_dirty(struct super_block *sb) 719 { 720 struct ufs_sb_info *sbi = UFS_SB(sb); 721 unsigned long delay; 722 723 spin_lock(&sbi->work_lock); 724 if (!sbi->work_queued) { 725 delay = msecs_to_jiffies(dirty_writeback_interval * 10); 726 queue_delayed_work(system_long_wq, &sbi->sync_work, delay); 727 sbi->work_queued = 1; 728 } 729 spin_unlock(&sbi->work_lock); 730 } 731 732 static void ufs_put_super(struct super_block *sb) 733 { 734 struct ufs_sb_info * sbi = UFS_SB(sb); 735 736 UFSD("ENTER\n"); 737 738 if (!sb_rdonly(sb)) 739 ufs_put_super_internal(sb); 740 cancel_delayed_work_sync(&sbi->sync_work); 741 742 ubh_brelse_uspi (sbi->s_uspi); 743 kfree (sbi->s_uspi); 744 kfree (sbi); 745 sb->s_fs_info = NULL; 746 UFSD("EXIT\n"); 747 return; 748 } 749 750 static u64 ufs_max_bytes(struct super_block *sb) 751 { 752 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 753 int bits = uspi->s_apbshift; 754 u64 res; 755 756 if (bits > 21) 757 res = ~0ULL; 758 else 759 res = UFS_NDADDR + (1LL << bits) + (1LL << (2*bits)) + 760 (1LL << (3*bits)); 761 762 if (res >= (MAX_LFS_FILESIZE >> uspi->s_bshift)) 763 return MAX_LFS_FILESIZE; 764 return res << uspi->s_bshift; 765 } 766 767 static 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_rdonly(sb)) { 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_rdonly(sb))); 802 803 mutex_init(&sbi->s_lock); 804 spin_lock_init(&sbi->work_lock); 805 INIT_DELAYED_WORK(&sbi->sync_work, delayed_sync_fs); 806 /* 807 * Set default mount options 808 * Parse mount options 809 */ 810 sbi->s_mount_opt = 0; 811 ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK); 812 if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) { 813 pr_err("wrong mount options\n"); 814 goto failed; 815 } 816 if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) { 817 if (!silent) 818 pr_err("You didn't specify the type of your ufs filesystem\n\n" 819 "mount -t ufs -o ufstype=" 820 "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n" 821 ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, " 822 "default is ufstype=old\n"); 823 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD); 824 } 825 826 uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL); 827 sbi->s_uspi = uspi; 828 if (!uspi) 829 goto failed; 830 uspi->s_dirblksize = UFS_SECTOR_SIZE; 831 super_block_offset=UFS_SBLOCK; 832 833 sb->s_maxbytes = MAX_LFS_FILESIZE; 834 835 sb->s_time_gran = NSEC_PER_SEC; 836 sb->s_time_min = S32_MIN; 837 sb->s_time_max = S32_MAX; 838 839 switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) { 840 case UFS_MOUNT_UFSTYPE_44BSD: 841 UFSD("ufstype=44bsd\n"); 842 uspi->s_fsize = block_size = 512; 843 uspi->s_fmask = ~(512 - 1); 844 uspi->s_fshift = 9; 845 uspi->s_sbsize = super_block_size = 1536; 846 uspi->s_sbbase = 0; 847 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; 848 break; 849 case UFS_MOUNT_UFSTYPE_UFS2: 850 UFSD("ufstype=ufs2\n"); 851 super_block_offset=SBLOCK_UFS2; 852 uspi->s_fsize = block_size = 512; 853 uspi->s_fmask = ~(512 - 1); 854 uspi->s_fshift = 9; 855 uspi->s_sbsize = super_block_size = 1536; 856 uspi->s_sbbase = 0; 857 sb->s_time_gran = 1; 858 sb->s_time_min = S64_MIN; 859 sb->s_time_max = S64_MAX; 860 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; 861 break; 862 863 case UFS_MOUNT_UFSTYPE_SUN: 864 UFSD("ufstype=sun\n"); 865 uspi->s_fsize = block_size = 1024; 866 uspi->s_fmask = ~(1024 - 1); 867 uspi->s_fshift = 10; 868 uspi->s_sbsize = super_block_size = 2048; 869 uspi->s_sbbase = 0; 870 uspi->s_maxsymlinklen = 0; /* Not supported on disk */ 871 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN; 872 break; 873 874 case UFS_MOUNT_UFSTYPE_SUNOS: 875 UFSD("ufstype=sunos\n"); 876 uspi->s_fsize = block_size = 1024; 877 uspi->s_fmask = ~(1024 - 1); 878 uspi->s_fshift = 10; 879 uspi->s_sbsize = 2048; 880 super_block_size = 2048; 881 uspi->s_sbbase = 0; 882 uspi->s_maxsymlinklen = 0; /* Not supported on disk */ 883 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_SUNOS | UFS_CG_SUN; 884 break; 885 886 case UFS_MOUNT_UFSTYPE_SUNx86: 887 UFSD("ufstype=sunx86\n"); 888 uspi->s_fsize = block_size = 1024; 889 uspi->s_fmask = ~(1024 - 1); 890 uspi->s_fshift = 10; 891 uspi->s_sbsize = super_block_size = 2048; 892 uspi->s_sbbase = 0; 893 uspi->s_maxsymlinklen = 0; /* Not supported on disk */ 894 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN; 895 break; 896 897 case UFS_MOUNT_UFSTYPE_OLD: 898 UFSD("ufstype=old\n"); 899 uspi->s_fsize = block_size = 1024; 900 uspi->s_fmask = ~(1024 - 1); 901 uspi->s_fshift = 10; 902 uspi->s_sbsize = super_block_size = 2048; 903 uspi->s_sbbase = 0; 904 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 905 if (!sb_rdonly(sb)) { 906 if (!silent) 907 pr_info("ufstype=old is supported read-only\n"); 908 sb->s_flags |= SB_RDONLY; 909 } 910 break; 911 912 case UFS_MOUNT_UFSTYPE_NEXTSTEP: 913 UFSD("ufstype=nextstep\n"); 914 uspi->s_fsize = block_size = 1024; 915 uspi->s_fmask = ~(1024 - 1); 916 uspi->s_fshift = 10; 917 uspi->s_sbsize = super_block_size = 2048; 918 uspi->s_sbbase = 0; 919 uspi->s_dirblksize = 1024; 920 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 921 if (!sb_rdonly(sb)) { 922 if (!silent) 923 pr_info("ufstype=nextstep is supported read-only\n"); 924 sb->s_flags |= SB_RDONLY; 925 } 926 break; 927 928 case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD: 929 UFSD("ufstype=nextstep-cd\n"); 930 uspi->s_fsize = block_size = 2048; 931 uspi->s_fmask = ~(2048 - 1); 932 uspi->s_fshift = 11; 933 uspi->s_sbsize = super_block_size = 2048; 934 uspi->s_sbbase = 0; 935 uspi->s_dirblksize = 1024; 936 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 937 if (!sb_rdonly(sb)) { 938 if (!silent) 939 pr_info("ufstype=nextstep-cd is supported read-only\n"); 940 sb->s_flags |= SB_RDONLY; 941 } 942 break; 943 944 case UFS_MOUNT_UFSTYPE_OPENSTEP: 945 UFSD("ufstype=openstep\n"); 946 uspi->s_fsize = block_size = 1024; 947 uspi->s_fmask = ~(1024 - 1); 948 uspi->s_fshift = 10; 949 uspi->s_sbsize = super_block_size = 2048; 950 uspi->s_sbbase = 0; 951 uspi->s_dirblksize = 1024; 952 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; 953 if (!sb_rdonly(sb)) { 954 if (!silent) 955 pr_info("ufstype=openstep is supported read-only\n"); 956 sb->s_flags |= SB_RDONLY; 957 } 958 break; 959 960 case UFS_MOUNT_UFSTYPE_HP: 961 UFSD("ufstype=hp\n"); 962 uspi->s_fsize = block_size = 1024; 963 uspi->s_fmask = ~(1024 - 1); 964 uspi->s_fshift = 10; 965 uspi->s_sbsize = super_block_size = 2048; 966 uspi->s_sbbase = 0; 967 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 968 if (!sb_rdonly(sb)) { 969 if (!silent) 970 pr_info("ufstype=hp is supported read-only\n"); 971 sb->s_flags |= SB_RDONLY; 972 } 973 break; 974 default: 975 if (!silent) 976 pr_err("unknown ufstype\n"); 977 goto failed; 978 } 979 980 again: 981 if (!sb_set_blocksize(sb, block_size)) { 982 pr_err("failed to set blocksize\n"); 983 goto failed; 984 } 985 986 /* 987 * read ufs super block from device 988 */ 989 990 ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size); 991 992 if (!ubh) 993 goto failed; 994 995 usb1 = ubh_get_usb_first(uspi); 996 usb2 = ubh_get_usb_second(uspi); 997 usb3 = ubh_get_usb_third(uspi); 998 999 /* Sort out mod used on SunOS 4.1.3 for fs_state */ 1000 uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat); 1001 if (((flags & UFS_ST_MASK) == UFS_ST_SUNOS) && 1002 (uspi->s_postblformat != UFS_42POSTBLFMT)) { 1003 flags &= ~UFS_ST_MASK; 1004 flags |= UFS_ST_SUN; 1005 } 1006 1007 if ((flags & UFS_ST_MASK) == UFS_ST_44BSD && 1008 uspi->s_postblformat == UFS_42POSTBLFMT) { 1009 if (!silent) 1010 pr_err("this is not a 44bsd filesystem"); 1011 goto failed; 1012 } 1013 1014 /* 1015 * Check ufs magic number 1016 */ 1017 sbi->s_bytesex = BYTESEX_LE; 1018 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) { 1019 case UFS_MAGIC: 1020 case UFS_MAGIC_BW: 1021 case UFS2_MAGIC: 1022 case UFS_MAGIC_LFN: 1023 case UFS_MAGIC_FEA: 1024 case UFS_MAGIC_4GB: 1025 goto magic_found; 1026 } 1027 sbi->s_bytesex = BYTESEX_BE; 1028 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) { 1029 case UFS_MAGIC: 1030 case UFS_MAGIC_BW: 1031 case UFS2_MAGIC: 1032 case UFS_MAGIC_LFN: 1033 case UFS_MAGIC_FEA: 1034 case UFS_MAGIC_4GB: 1035 goto magic_found; 1036 } 1037 1038 if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP) 1039 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD) 1040 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP)) 1041 && uspi->s_sbbase < 256) { 1042 ubh_brelse_uspi(uspi); 1043 ubh = NULL; 1044 uspi->s_sbbase += 8; 1045 goto again; 1046 } 1047 if (!silent) 1048 pr_err("%s(): bad magic number\n", __func__); 1049 goto failed; 1050 1051 magic_found: 1052 /* 1053 * Check block and fragment sizes 1054 */ 1055 uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize); 1056 uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize); 1057 uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize); 1058 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask); 1059 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift); 1060 1061 if (!is_power_of_2(uspi->s_fsize)) { 1062 pr_err("%s(): fragment size %u is not a power of 2\n", 1063 __func__, uspi->s_fsize); 1064 goto failed; 1065 } 1066 if (uspi->s_fsize < 512) { 1067 pr_err("%s(): fragment size %u is too small\n", 1068 __func__, uspi->s_fsize); 1069 goto failed; 1070 } 1071 if (uspi->s_fsize > 4096) { 1072 pr_err("%s(): fragment size %u is too large\n", 1073 __func__, uspi->s_fsize); 1074 goto failed; 1075 } 1076 if (!is_power_of_2(uspi->s_bsize)) { 1077 pr_err("%s(): block size %u is not a power of 2\n", 1078 __func__, uspi->s_bsize); 1079 goto failed; 1080 } 1081 if (uspi->s_bsize < 4096) { 1082 pr_err("%s(): block size %u is too small\n", 1083 __func__, uspi->s_bsize); 1084 goto failed; 1085 } 1086 if (uspi->s_bsize / uspi->s_fsize > 8) { 1087 pr_err("%s(): too many fragments per block (%u)\n", 1088 __func__, uspi->s_bsize / uspi->s_fsize); 1089 goto failed; 1090 } 1091 if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) { 1092 ubh_brelse_uspi(uspi); 1093 ubh = NULL; 1094 block_size = uspi->s_fsize; 1095 super_block_size = uspi->s_sbsize; 1096 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size); 1097 goto again; 1098 } 1099 1100 sbi->s_flags = flags;/*after that line some functions use s_flags*/ 1101 ufs_print_super_stuff(sb, usb1, usb2, usb3); 1102 1103 /* 1104 * Check, if file system was correctly unmounted. 1105 * If not, make it read only. 1106 */ 1107 if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) || 1108 ((flags & UFS_ST_MASK) == UFS_ST_OLD) || 1109 (((flags & UFS_ST_MASK) == UFS_ST_SUN || 1110 (flags & UFS_ST_MASK) == UFS_ST_SUNOS || 1111 (flags & UFS_ST_MASK) == UFS_ST_SUNx86) && 1112 (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) { 1113 switch(usb1->fs_clean) { 1114 case UFS_FSCLEAN: 1115 UFSD("fs is clean\n"); 1116 break; 1117 case UFS_FSSTABLE: 1118 UFSD("fs is stable\n"); 1119 break; 1120 case UFS_FSLOG: 1121 UFSD("fs is logging fs\n"); 1122 break; 1123 case UFS_FSOSF1: 1124 UFSD("fs is DEC OSF/1\n"); 1125 break; 1126 case UFS_FSACTIVE: 1127 pr_err("%s(): fs is active\n", __func__); 1128 sb->s_flags |= SB_RDONLY; 1129 break; 1130 case UFS_FSBAD: 1131 pr_err("%s(): fs is bad\n", __func__); 1132 sb->s_flags |= SB_RDONLY; 1133 break; 1134 default: 1135 pr_err("%s(): can't grok fs_clean 0x%x\n", 1136 __func__, usb1->fs_clean); 1137 sb->s_flags |= SB_RDONLY; 1138 break; 1139 } 1140 } else { 1141 pr_err("%s(): fs needs fsck\n", __func__); 1142 sb->s_flags |= SB_RDONLY; 1143 } 1144 1145 /* 1146 * Read ufs_super_block into internal data structures 1147 */ 1148 sb->s_op = &ufs_super_ops; 1149 sb->s_export_op = &ufs_export_ops; 1150 1151 sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic); 1152 1153 uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno); 1154 uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno); 1155 uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno); 1156 uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno); 1157 uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset); 1158 uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask); 1159 1160 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { 1161 uspi->s_size = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size); 1162 uspi->s_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize); 1163 } else { 1164 uspi->s_size = fs32_to_cpu(sb, usb1->fs_size); 1165 uspi->s_dsize = fs32_to_cpu(sb, usb1->fs_dsize); 1166 } 1167 1168 uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg); 1169 /* s_bsize already set */ 1170 /* s_fsize already set */ 1171 uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag); 1172 uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree); 1173 uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask); 1174 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask); 1175 uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift); 1176 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift); 1177 UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift, 1178 uspi->s_fshift); 1179 uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift); 1180 uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb); 1181 /* s_sbsize already set */ 1182 uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask); 1183 uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift); 1184 uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir); 1185 uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb); 1186 uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf); 1187 uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3); 1188 uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave); 1189 uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew); 1190 1191 if (uspi->fs_magic == UFS2_MAGIC) 1192 uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr); 1193 else 1194 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr); 1195 1196 uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize); 1197 uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize); 1198 uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak); 1199 uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect); 1200 uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc); 1201 uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg); 1202 uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg); 1203 uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc); 1204 uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize); 1205 uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3); 1206 uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3); 1207 uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos); 1208 uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff); 1209 uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff); 1210 1211 uspi->s_root_blocks = mul_u64_u32_div(uspi->s_dsize, 1212 uspi->s_minfree, 100); 1213 if (uspi->s_minfree <= 5) { 1214 uspi->s_time_to_space = ~0ULL; 1215 uspi->s_space_to_time = 0; 1216 usb1->fs_optim = cpu_to_fs32(sb, UFS_OPTSPACE); 1217 } else { 1218 uspi->s_time_to_space = (uspi->s_root_blocks / 2) + 1; 1219 uspi->s_space_to_time = mul_u64_u32_div(uspi->s_dsize, 1220 uspi->s_minfree - 2, 100) - 1; 1221 } 1222 1223 /* 1224 * Compute another frequently used values 1225 */ 1226 uspi->s_fpbmask = uspi->s_fpb - 1; 1227 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) 1228 uspi->s_apbshift = uspi->s_bshift - 3; 1229 else 1230 uspi->s_apbshift = uspi->s_bshift - 2; 1231 1232 uspi->s_apb = 1 << uspi->s_apbshift; 1233 uspi->s_apbmask = uspi->s_apb - 1; 1234 uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS; 1235 uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift; 1236 uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift; 1237 uspi->s_bpf = uspi->s_fsize << 3; 1238 uspi->s_bpfshift = uspi->s_fshift + 3; 1239 uspi->s_bpfmask = uspi->s_bpf - 1; 1240 if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_44BSD || 1241 (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_UFS2) 1242 uspi->s_maxsymlinklen = 1243 fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen); 1244 1245 if (uspi->fs_magic == UFS2_MAGIC) 1246 maxsymlen = 2 * 4 * (UFS_NDADDR + UFS_NINDIR); 1247 else 1248 maxsymlen = 4 * (UFS_NDADDR + UFS_NINDIR); 1249 if (uspi->s_maxsymlinklen > maxsymlen) { 1250 ufs_warning(sb, __func__, "ufs_read_super: excessive maximum " 1251 "fast symlink size (%u)\n", uspi->s_maxsymlinklen); 1252 uspi->s_maxsymlinklen = maxsymlen; 1253 } 1254 sb->s_maxbytes = ufs_max_bytes(sb); 1255 sb->s_max_links = UFS_LINK_MAX; 1256 1257 inode = ufs_iget(sb, UFS_ROOTINO); 1258 if (IS_ERR(inode)) { 1259 ret = PTR_ERR(inode); 1260 goto failed; 1261 } 1262 sb->s_root = d_make_root(inode); 1263 if (!sb->s_root) { 1264 ret = -ENOMEM; 1265 goto failed; 1266 } 1267 1268 ufs_setup_cstotal(sb); 1269 /* 1270 * Read cylinder group structures 1271 */ 1272 if (!sb_rdonly(sb)) 1273 if (!ufs_read_cylinder_structures(sb)) 1274 goto failed; 1275 1276 UFSD("EXIT\n"); 1277 return 0; 1278 1279 failed: 1280 if (ubh) 1281 ubh_brelse_uspi (uspi); 1282 kfree (uspi); 1283 kfree(sbi); 1284 sb->s_fs_info = NULL; 1285 UFSD("EXIT (FAILED)\n"); 1286 return ret; 1287 1288 failed_nomem: 1289 UFSD("EXIT (NOMEM)\n"); 1290 return -ENOMEM; 1291 } 1292 1293 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data) 1294 { 1295 struct ufs_sb_private_info * uspi; 1296 struct ufs_super_block_first * usb1; 1297 struct ufs_super_block_third * usb3; 1298 unsigned new_mount_opt, ufstype; 1299 unsigned flags; 1300 1301 sync_filesystem(sb); 1302 mutex_lock(&UFS_SB(sb)->s_lock); 1303 uspi = UFS_SB(sb)->s_uspi; 1304 flags = UFS_SB(sb)->s_flags; 1305 usb1 = ubh_get_usb_first(uspi); 1306 usb3 = ubh_get_usb_third(uspi); 1307 1308 /* 1309 * Allow the "check" option to be passed as a remount option. 1310 * It is not possible to change ufstype option during remount 1311 */ 1312 ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE; 1313 new_mount_opt = 0; 1314 ufs_set_opt (new_mount_opt, ONERROR_LOCK); 1315 if (!ufs_parse_options (data, &new_mount_opt)) { 1316 mutex_unlock(&UFS_SB(sb)->s_lock); 1317 return -EINVAL; 1318 } 1319 if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) { 1320 new_mount_opt |= ufstype; 1321 } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) { 1322 pr_err("ufstype can't be changed during remount\n"); 1323 mutex_unlock(&UFS_SB(sb)->s_lock); 1324 return -EINVAL; 1325 } 1326 1327 if ((bool)(*mount_flags & SB_RDONLY) == sb_rdonly(sb)) { 1328 UFS_SB(sb)->s_mount_opt = new_mount_opt; 1329 mutex_unlock(&UFS_SB(sb)->s_lock); 1330 return 0; 1331 } 1332 1333 /* 1334 * fs was mouted as rw, remounting ro 1335 */ 1336 if (*mount_flags & SB_RDONLY) { 1337 ufs_put_super_internal(sb); 1338 usb1->fs_time = ufs_get_seconds(sb); 1339 if ((flags & UFS_ST_MASK) == UFS_ST_SUN 1340 || (flags & UFS_ST_MASK) == UFS_ST_SUNOS 1341 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86) 1342 ufs_set_fs_state(sb, usb1, usb3, 1343 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time)); 1344 ubh_mark_buffer_dirty (USPI_UBH(uspi)); 1345 sb->s_flags |= SB_RDONLY; 1346 } else { 1347 /* 1348 * fs was mounted as ro, remounting rw 1349 */ 1350 #ifndef CONFIG_UFS_FS_WRITE 1351 pr_err("ufs was compiled with read-only support, can't be mounted as read-write\n"); 1352 mutex_unlock(&UFS_SB(sb)->s_lock); 1353 return -EINVAL; 1354 #else 1355 if (ufstype != UFS_MOUNT_UFSTYPE_SUN && 1356 ufstype != UFS_MOUNT_UFSTYPE_SUNOS && 1357 ufstype != UFS_MOUNT_UFSTYPE_44BSD && 1358 ufstype != UFS_MOUNT_UFSTYPE_SUNx86 && 1359 ufstype != UFS_MOUNT_UFSTYPE_UFS2) { 1360 pr_err("this ufstype is read-only supported\n"); 1361 mutex_unlock(&UFS_SB(sb)->s_lock); 1362 return -EINVAL; 1363 } 1364 if (!ufs_read_cylinder_structures(sb)) { 1365 pr_err("failed during remounting\n"); 1366 mutex_unlock(&UFS_SB(sb)->s_lock); 1367 return -EPERM; 1368 } 1369 sb->s_flags &= ~SB_RDONLY; 1370 #endif 1371 } 1372 UFS_SB(sb)->s_mount_opt = new_mount_opt; 1373 mutex_unlock(&UFS_SB(sb)->s_lock); 1374 return 0; 1375 } 1376 1377 static int ufs_show_options(struct seq_file *seq, struct dentry *root) 1378 { 1379 struct ufs_sb_info *sbi = UFS_SB(root->d_sb); 1380 unsigned mval = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE; 1381 const struct match_token *tp = tokens; 1382 1383 while (tp->token != Opt_onerror_panic && tp->token != mval) 1384 ++tp; 1385 BUG_ON(tp->token == Opt_onerror_panic); 1386 seq_printf(seq, ",%s", tp->pattern); 1387 1388 mval = sbi->s_mount_opt & UFS_MOUNT_ONERROR; 1389 while (tp->token != Opt_err && tp->token != mval) 1390 ++tp; 1391 BUG_ON(tp->token == Opt_err); 1392 seq_printf(seq, ",%s", tp->pattern); 1393 1394 return 0; 1395 } 1396 1397 static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf) 1398 { 1399 struct super_block *sb = dentry->d_sb; 1400 struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi; 1401 unsigned flags = UFS_SB(sb)->s_flags; 1402 u64 id = huge_encode_dev(sb->s_bdev->bd_dev); 1403 1404 mutex_lock(&UFS_SB(sb)->s_lock); 1405 1406 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) 1407 buf->f_type = UFS2_MAGIC; 1408 else 1409 buf->f_type = UFS_MAGIC; 1410 1411 buf->f_blocks = uspi->s_dsize; 1412 buf->f_bfree = ufs_freefrags(uspi); 1413 buf->f_ffree = uspi->cs_total.cs_nifree; 1414 buf->f_bsize = sb->s_blocksize; 1415 buf->f_bavail = (buf->f_bfree > uspi->s_root_blocks) 1416 ? (buf->f_bfree - uspi->s_root_blocks) : 0; 1417 buf->f_files = uspi->s_ncg * uspi->s_ipg; 1418 buf->f_namelen = UFS_MAXNAMLEN; 1419 buf->f_fsid = u64_to_fsid(id); 1420 1421 mutex_unlock(&UFS_SB(sb)->s_lock); 1422 1423 return 0; 1424 } 1425 1426 static struct kmem_cache * ufs_inode_cachep; 1427 1428 static struct inode *ufs_alloc_inode(struct super_block *sb) 1429 { 1430 struct ufs_inode_info *ei; 1431 1432 ei = alloc_inode_sb(sb, ufs_inode_cachep, GFP_NOFS); 1433 if (!ei) 1434 return NULL; 1435 1436 inode_set_iversion(&ei->vfs_inode, 1); 1437 seqlock_init(&ei->meta_lock); 1438 mutex_init(&ei->truncate_mutex); 1439 return &ei->vfs_inode; 1440 } 1441 1442 static void ufs_free_in_core_inode(struct inode *inode) 1443 { 1444 kmem_cache_free(ufs_inode_cachep, UFS_I(inode)); 1445 } 1446 1447 static void init_once(void *foo) 1448 { 1449 struct ufs_inode_info *ei = (struct ufs_inode_info *) foo; 1450 1451 inode_init_once(&ei->vfs_inode); 1452 } 1453 1454 static int __init init_inodecache(void) 1455 { 1456 ufs_inode_cachep = kmem_cache_create_usercopy("ufs_inode_cache", 1457 sizeof(struct ufs_inode_info), 0, 1458 (SLAB_RECLAIM_ACCOUNT | SLAB_ACCOUNT), 1459 offsetof(struct ufs_inode_info, i_u1.i_symlink), 1460 sizeof_field(struct ufs_inode_info, 1461 i_u1.i_symlink), 1462 init_once); 1463 if (ufs_inode_cachep == NULL) 1464 return -ENOMEM; 1465 return 0; 1466 } 1467 1468 static void destroy_inodecache(void) 1469 { 1470 /* 1471 * Make sure all delayed rcu free inodes are flushed before we 1472 * destroy cache. 1473 */ 1474 rcu_barrier(); 1475 kmem_cache_destroy(ufs_inode_cachep); 1476 } 1477 1478 static const struct super_operations ufs_super_ops = { 1479 .alloc_inode = ufs_alloc_inode, 1480 .free_inode = ufs_free_in_core_inode, 1481 .write_inode = ufs_write_inode, 1482 .evict_inode = ufs_evict_inode, 1483 .put_super = ufs_put_super, 1484 .sync_fs = ufs_sync_fs, 1485 .statfs = ufs_statfs, 1486 .remount_fs = ufs_remount, 1487 .show_options = ufs_show_options, 1488 }; 1489 1490 static struct dentry *ufs_mount(struct file_system_type *fs_type, 1491 int flags, const char *dev_name, void *data) 1492 { 1493 return mount_bdev(fs_type, flags, dev_name, data, ufs_fill_super); 1494 } 1495 1496 static struct file_system_type ufs_fs_type = { 1497 .owner = THIS_MODULE, 1498 .name = "ufs", 1499 .mount = ufs_mount, 1500 .kill_sb = kill_block_super, 1501 .fs_flags = FS_REQUIRES_DEV, 1502 }; 1503 MODULE_ALIAS_FS("ufs"); 1504 1505 static int __init init_ufs_fs(void) 1506 { 1507 int err = init_inodecache(); 1508 if (err) 1509 goto out1; 1510 err = register_filesystem(&ufs_fs_type); 1511 if (err) 1512 goto out; 1513 return 0; 1514 out: 1515 destroy_inodecache(); 1516 out1: 1517 return err; 1518 } 1519 1520 static void __exit exit_ufs_fs(void) 1521 { 1522 unregister_filesystem(&ufs_fs_type); 1523 destroy_inodecache(); 1524 } 1525 1526 module_init(init_ufs_fs) 1527 module_exit(exit_ufs_fs) 1528 MODULE_DESCRIPTION("UFS Filesystem"); 1529 MODULE_LICENSE("GPL"); 1530