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 <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 > uspi->s_ncg * uspi->s_ipg) 105 return ERR_PTR(-ESTALE); 106 107 inode = ufs_iget(sb, ino); 108 if (IS_ERR(inode)) 109 return ERR_CAST(inode); 110 if (generation && inode->i_generation != generation) { 111 iput(inode); 112 return ERR_PTR(-ESTALE); 113 } 114 return inode; 115 } 116 117 static struct dentry *ufs_fh_to_dentry(struct super_block *sb, struct fid *fid, 118 int fh_len, int fh_type) 119 { 120 return generic_fh_to_dentry(sb, fid, fh_len, fh_type, ufs_nfs_get_inode); 121 } 122 123 static struct dentry *ufs_fh_to_parent(struct super_block *sb, struct fid *fid, 124 int fh_len, int fh_type) 125 { 126 return generic_fh_to_parent(sb, fid, fh_len, fh_type, ufs_nfs_get_inode); 127 } 128 129 static struct dentry *ufs_get_parent(struct dentry *child) 130 { 131 struct qstr dot_dot = QSTR_INIT("..", 2); 132 ino_t ino; 133 134 ino = ufs_inode_by_name(d_inode(child), &dot_dot); 135 if (!ino) 136 return ERR_PTR(-ENOENT); 137 return d_obtain_alias(ufs_iget(child->d_sb, ino)); 138 } 139 140 static const struct export_operations ufs_export_ops = { 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 struct ufs_buffer_head * ubh; 509 unsigned char * base, * space; 510 unsigned size, blks, i; 511 512 UFSD("ENTER\n"); 513 514 /* 515 * Read cs structures from (usually) first data block 516 * on the device. 517 */ 518 size = uspi->s_cssize; 519 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift; 520 base = space = kmalloc(size, GFP_NOFS); 521 if (!base) 522 goto failed; 523 sbi->s_csp = (struct ufs_csum *)space; 524 for (i = 0; i < blks; i += uspi->s_fpb) { 525 size = uspi->s_bsize; 526 if (i + uspi->s_fpb > blks) 527 size = (blks - i) * uspi->s_fsize; 528 529 ubh = ubh_bread(sb, uspi->s_csaddr + i, size); 530 531 if (!ubh) 532 goto failed; 533 534 ubh_ubhcpymem (space, ubh, size); 535 536 space += size; 537 ubh_brelse (ubh); 538 ubh = NULL; 539 } 540 541 /* 542 * Read cylinder group (we read only first fragment from block 543 * at this time) and prepare internal data structures for cg caching. 544 */ 545 sbi->s_ucg = kmalloc_array(uspi->s_ncg, sizeof(struct buffer_head *), 546 GFP_NOFS); 547 if (!sbi->s_ucg) 548 goto failed; 549 for (i = 0; i < uspi->s_ncg; i++) 550 sbi->s_ucg[i] = NULL; 551 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) { 552 sbi->s_ucpi[i] = NULL; 553 sbi->s_cgno[i] = UFS_CGNO_EMPTY; 554 } 555 for (i = 0; i < uspi->s_ncg; i++) { 556 UFSD("read cg %u\n", i); 557 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i)))) 558 goto failed; 559 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data)) 560 goto failed; 561 562 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data); 563 } 564 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) { 565 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_NOFS))) 566 goto failed; 567 sbi->s_cgno[i] = UFS_CGNO_EMPTY; 568 } 569 sbi->s_cg_loaded = 0; 570 UFSD("EXIT\n"); 571 return 1; 572 573 failed: 574 kfree (base); 575 if (sbi->s_ucg) { 576 for (i = 0; i < uspi->s_ncg; i++) 577 if (sbi->s_ucg[i]) 578 brelse (sbi->s_ucg[i]); 579 kfree (sbi->s_ucg); 580 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) 581 kfree (sbi->s_ucpi[i]); 582 } 583 UFSD("EXIT (FAILED)\n"); 584 return 0; 585 } 586 587 /* 588 * Sync our internal copy of fs_cstotal with disk 589 */ 590 static void ufs_put_cstotal(struct super_block *sb) 591 { 592 unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE; 593 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 594 struct ufs_super_block_first *usb1; 595 struct ufs_super_block_second *usb2; 596 struct ufs_super_block_third *usb3; 597 598 UFSD("ENTER\n"); 599 usb1 = ubh_get_usb_first(uspi); 600 usb2 = ubh_get_usb_second(uspi); 601 usb3 = ubh_get_usb_third(uspi); 602 603 if (mtype == UFS_MOUNT_UFSTYPE_UFS2) { 604 /*we have statistic in different place, then usual*/ 605 usb2->fs_un.fs_u2.cs_ndir = 606 cpu_to_fs64(sb, uspi->cs_total.cs_ndir); 607 usb2->fs_un.fs_u2.cs_nbfree = 608 cpu_to_fs64(sb, uspi->cs_total.cs_nbfree); 609 usb3->fs_un1.fs_u2.cs_nifree = 610 cpu_to_fs64(sb, uspi->cs_total.cs_nifree); 611 usb3->fs_un1.fs_u2.cs_nffree = 612 cpu_to_fs64(sb, uspi->cs_total.cs_nffree); 613 goto out; 614 } 615 616 if (mtype == UFS_MOUNT_UFSTYPE_44BSD && 617 (usb2->fs_un.fs_u2.fs_maxbsize == usb1->fs_bsize)) { 618 /* store stats in both old and new places */ 619 usb2->fs_un.fs_u2.cs_ndir = 620 cpu_to_fs64(sb, uspi->cs_total.cs_ndir); 621 usb2->fs_un.fs_u2.cs_nbfree = 622 cpu_to_fs64(sb, uspi->cs_total.cs_nbfree); 623 usb3->fs_un1.fs_u2.cs_nifree = 624 cpu_to_fs64(sb, uspi->cs_total.cs_nifree); 625 usb3->fs_un1.fs_u2.cs_nffree = 626 cpu_to_fs64(sb, uspi->cs_total.cs_nffree); 627 } 628 usb1->fs_cstotal.cs_ndir = cpu_to_fs32(sb, uspi->cs_total.cs_ndir); 629 usb1->fs_cstotal.cs_nbfree = cpu_to_fs32(sb, uspi->cs_total.cs_nbfree); 630 usb1->fs_cstotal.cs_nifree = cpu_to_fs32(sb, uspi->cs_total.cs_nifree); 631 usb1->fs_cstotal.cs_nffree = cpu_to_fs32(sb, uspi->cs_total.cs_nffree); 632 out: 633 ubh_mark_buffer_dirty(USPI_UBH(uspi)); 634 ufs_print_super_stuff(sb, usb1, usb2, usb3); 635 UFSD("EXIT\n"); 636 } 637 638 /** 639 * ufs_put_super_internal() - put on-disk intrenal structures 640 * @sb: pointer to super_block structure 641 * Put on-disk structures associated with cylinder groups 642 * and write them back to disk, also update cs_total on disk 643 */ 644 static void ufs_put_super_internal(struct super_block *sb) 645 { 646 struct ufs_sb_info *sbi = UFS_SB(sb); 647 struct ufs_sb_private_info *uspi = sbi->s_uspi; 648 struct ufs_buffer_head * ubh; 649 unsigned char * base, * space; 650 unsigned blks, size, i; 651 652 653 UFSD("ENTER\n"); 654 655 ufs_put_cstotal(sb); 656 size = uspi->s_cssize; 657 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift; 658 base = space = (char*) sbi->s_csp; 659 for (i = 0; i < blks; i += uspi->s_fpb) { 660 size = uspi->s_bsize; 661 if (i + uspi->s_fpb > blks) 662 size = (blks - i) * uspi->s_fsize; 663 664 ubh = ubh_bread(sb, uspi->s_csaddr + i, size); 665 666 ubh_memcpyubh (ubh, space, size); 667 space += size; 668 ubh_mark_buffer_uptodate (ubh, 1); 669 ubh_mark_buffer_dirty (ubh); 670 ubh_brelse (ubh); 671 } 672 for (i = 0; i < sbi->s_cg_loaded; i++) { 673 ufs_put_cylinder (sb, i); 674 kfree (sbi->s_ucpi[i]); 675 } 676 for (; i < UFS_MAX_GROUP_LOADED; i++) 677 kfree (sbi->s_ucpi[i]); 678 for (i = 0; i < uspi->s_ncg; i++) 679 brelse (sbi->s_ucg[i]); 680 kfree (sbi->s_ucg); 681 kfree (base); 682 683 UFSD("EXIT\n"); 684 } 685 686 static int ufs_sync_fs(struct super_block *sb, int wait) 687 { 688 struct ufs_sb_private_info * uspi; 689 struct ufs_super_block_first * usb1; 690 struct ufs_super_block_third * usb3; 691 unsigned flags; 692 693 mutex_lock(&UFS_SB(sb)->s_lock); 694 695 UFSD("ENTER\n"); 696 697 flags = UFS_SB(sb)->s_flags; 698 uspi = UFS_SB(sb)->s_uspi; 699 usb1 = ubh_get_usb_first(uspi); 700 usb3 = ubh_get_usb_third(uspi); 701 702 usb1->fs_time = ufs_get_seconds(sb); 703 if ((flags & UFS_ST_MASK) == UFS_ST_SUN || 704 (flags & UFS_ST_MASK) == UFS_ST_SUNOS || 705 (flags & UFS_ST_MASK) == UFS_ST_SUNx86) 706 ufs_set_fs_state(sb, usb1, usb3, 707 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time)); 708 ufs_put_cstotal(sb); 709 710 UFSD("EXIT\n"); 711 mutex_unlock(&UFS_SB(sb)->s_lock); 712 713 return 0; 714 } 715 716 static void delayed_sync_fs(struct work_struct *work) 717 { 718 struct ufs_sb_info *sbi; 719 720 sbi = container_of(work, struct ufs_sb_info, sync_work.work); 721 722 spin_lock(&sbi->work_lock); 723 sbi->work_queued = 0; 724 spin_unlock(&sbi->work_lock); 725 726 ufs_sync_fs(sbi->sb, 1); 727 } 728 729 void ufs_mark_sb_dirty(struct super_block *sb) 730 { 731 struct ufs_sb_info *sbi = UFS_SB(sb); 732 unsigned long delay; 733 734 spin_lock(&sbi->work_lock); 735 if (!sbi->work_queued) { 736 delay = msecs_to_jiffies(dirty_writeback_interval * 10); 737 queue_delayed_work(system_long_wq, &sbi->sync_work, delay); 738 sbi->work_queued = 1; 739 } 740 spin_unlock(&sbi->work_lock); 741 } 742 743 static void ufs_put_super(struct super_block *sb) 744 { 745 struct ufs_sb_info * sbi = UFS_SB(sb); 746 747 UFSD("ENTER\n"); 748 749 if (!sb_rdonly(sb)) 750 ufs_put_super_internal(sb); 751 cancel_delayed_work_sync(&sbi->sync_work); 752 753 ubh_brelse_uspi (sbi->s_uspi); 754 kfree (sbi->s_uspi); 755 kfree (sbi); 756 sb->s_fs_info = NULL; 757 UFSD("EXIT\n"); 758 return; 759 } 760 761 static u64 ufs_max_bytes(struct super_block *sb) 762 { 763 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 764 int bits = uspi->s_apbshift; 765 u64 res; 766 767 if (bits > 21) 768 res = ~0ULL; 769 else 770 res = UFS_NDADDR + (1LL << bits) + (1LL << (2*bits)) + 771 (1LL << (3*bits)); 772 773 if (res >= (MAX_LFS_FILESIZE >> uspi->s_bshift)) 774 return MAX_LFS_FILESIZE; 775 return res << uspi->s_bshift; 776 } 777 778 static int ufs_fill_super(struct super_block *sb, void *data, int silent) 779 { 780 struct ufs_sb_info * sbi; 781 struct ufs_sb_private_info * uspi; 782 struct ufs_super_block_first * usb1; 783 struct ufs_super_block_second * usb2; 784 struct ufs_super_block_third * usb3; 785 struct ufs_buffer_head * ubh; 786 struct inode *inode; 787 unsigned block_size, super_block_size; 788 unsigned flags; 789 unsigned super_block_offset; 790 unsigned maxsymlen; 791 int ret = -EINVAL; 792 793 uspi = NULL; 794 ubh = NULL; 795 flags = 0; 796 797 UFSD("ENTER\n"); 798 799 #ifndef CONFIG_UFS_FS_WRITE 800 if (!sb_rdonly(sb)) { 801 pr_err("ufs was compiled with read-only support, can't be mounted as read-write\n"); 802 return -EROFS; 803 } 804 #endif 805 806 sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL); 807 if (!sbi) 808 goto failed_nomem; 809 sb->s_fs_info = sbi; 810 sbi->sb = sb; 811 812 UFSD("flag %u\n", (int)(sb_rdonly(sb))); 813 814 mutex_init(&sbi->s_lock); 815 spin_lock_init(&sbi->work_lock); 816 INIT_DELAYED_WORK(&sbi->sync_work, delayed_sync_fs); 817 /* 818 * Set default mount options 819 * Parse mount options 820 */ 821 sbi->s_mount_opt = 0; 822 ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK); 823 if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) { 824 pr_err("wrong mount options\n"); 825 goto failed; 826 } 827 if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) { 828 if (!silent) 829 pr_err("You didn't specify the type of your ufs filesystem\n\n" 830 "mount -t ufs -o ufstype=" 831 "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n" 832 ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, " 833 "default is ufstype=old\n"); 834 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD); 835 } 836 837 uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL); 838 sbi->s_uspi = uspi; 839 if (!uspi) 840 goto failed; 841 uspi->s_dirblksize = UFS_SECTOR_SIZE; 842 super_block_offset=UFS_SBLOCK; 843 844 sb->s_maxbytes = MAX_LFS_FILESIZE; 845 846 switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) { 847 case UFS_MOUNT_UFSTYPE_44BSD: 848 UFSD("ufstype=44bsd\n"); 849 uspi->s_fsize = block_size = 512; 850 uspi->s_fmask = ~(512 - 1); 851 uspi->s_fshift = 9; 852 uspi->s_sbsize = super_block_size = 1536; 853 uspi->s_sbbase = 0; 854 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; 855 break; 856 case UFS_MOUNT_UFSTYPE_UFS2: 857 UFSD("ufstype=ufs2\n"); 858 super_block_offset=SBLOCK_UFS2; 859 uspi->s_fsize = block_size = 512; 860 uspi->s_fmask = ~(512 - 1); 861 uspi->s_fshift = 9; 862 uspi->s_sbsize = super_block_size = 1536; 863 uspi->s_sbbase = 0; 864 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; 865 break; 866 867 case UFS_MOUNT_UFSTYPE_SUN: 868 UFSD("ufstype=sun\n"); 869 uspi->s_fsize = block_size = 1024; 870 uspi->s_fmask = ~(1024 - 1); 871 uspi->s_fshift = 10; 872 uspi->s_sbsize = super_block_size = 2048; 873 uspi->s_sbbase = 0; 874 uspi->s_maxsymlinklen = 0; /* Not supported on disk */ 875 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN; 876 break; 877 878 case UFS_MOUNT_UFSTYPE_SUNOS: 879 UFSD("ufstype=sunos\n"); 880 uspi->s_fsize = block_size = 1024; 881 uspi->s_fmask = ~(1024 - 1); 882 uspi->s_fshift = 10; 883 uspi->s_sbsize = 2048; 884 super_block_size = 2048; 885 uspi->s_sbbase = 0; 886 uspi->s_maxsymlinklen = 0; /* Not supported on disk */ 887 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_SUNOS | UFS_CG_SUN; 888 break; 889 890 case UFS_MOUNT_UFSTYPE_SUNx86: 891 UFSD("ufstype=sunx86\n"); 892 uspi->s_fsize = block_size = 1024; 893 uspi->s_fmask = ~(1024 - 1); 894 uspi->s_fshift = 10; 895 uspi->s_sbsize = super_block_size = 2048; 896 uspi->s_sbbase = 0; 897 uspi->s_maxsymlinklen = 0; /* Not supported on disk */ 898 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN; 899 break; 900 901 case UFS_MOUNT_UFSTYPE_OLD: 902 UFSD("ufstype=old\n"); 903 uspi->s_fsize = block_size = 1024; 904 uspi->s_fmask = ~(1024 - 1); 905 uspi->s_fshift = 10; 906 uspi->s_sbsize = super_block_size = 2048; 907 uspi->s_sbbase = 0; 908 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 909 if (!sb_rdonly(sb)) { 910 if (!silent) 911 pr_info("ufstype=old is supported read-only\n"); 912 sb->s_flags |= SB_RDONLY; 913 } 914 break; 915 916 case UFS_MOUNT_UFSTYPE_NEXTSTEP: 917 UFSD("ufstype=nextstep\n"); 918 uspi->s_fsize = block_size = 1024; 919 uspi->s_fmask = ~(1024 - 1); 920 uspi->s_fshift = 10; 921 uspi->s_sbsize = super_block_size = 2048; 922 uspi->s_sbbase = 0; 923 uspi->s_dirblksize = 1024; 924 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 925 if (!sb_rdonly(sb)) { 926 if (!silent) 927 pr_info("ufstype=nextstep is supported read-only\n"); 928 sb->s_flags |= SB_RDONLY; 929 } 930 break; 931 932 case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD: 933 UFSD("ufstype=nextstep-cd\n"); 934 uspi->s_fsize = block_size = 2048; 935 uspi->s_fmask = ~(2048 - 1); 936 uspi->s_fshift = 11; 937 uspi->s_sbsize = super_block_size = 2048; 938 uspi->s_sbbase = 0; 939 uspi->s_dirblksize = 1024; 940 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 941 if (!sb_rdonly(sb)) { 942 if (!silent) 943 pr_info("ufstype=nextstep-cd is supported read-only\n"); 944 sb->s_flags |= SB_RDONLY; 945 } 946 break; 947 948 case UFS_MOUNT_UFSTYPE_OPENSTEP: 949 UFSD("ufstype=openstep\n"); 950 uspi->s_fsize = block_size = 1024; 951 uspi->s_fmask = ~(1024 - 1); 952 uspi->s_fshift = 10; 953 uspi->s_sbsize = super_block_size = 2048; 954 uspi->s_sbbase = 0; 955 uspi->s_dirblksize = 1024; 956 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; 957 if (!sb_rdonly(sb)) { 958 if (!silent) 959 pr_info("ufstype=openstep is supported read-only\n"); 960 sb->s_flags |= SB_RDONLY; 961 } 962 break; 963 964 case UFS_MOUNT_UFSTYPE_HP: 965 UFSD("ufstype=hp\n"); 966 uspi->s_fsize = block_size = 1024; 967 uspi->s_fmask = ~(1024 - 1); 968 uspi->s_fshift = 10; 969 uspi->s_sbsize = super_block_size = 2048; 970 uspi->s_sbbase = 0; 971 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 972 if (!sb_rdonly(sb)) { 973 if (!silent) 974 pr_info("ufstype=hp is supported read-only\n"); 975 sb->s_flags |= SB_RDONLY; 976 } 977 break; 978 default: 979 if (!silent) 980 pr_err("unknown ufstype\n"); 981 goto failed; 982 } 983 984 again: 985 if (!sb_set_blocksize(sb, block_size)) { 986 pr_err("failed to set blocksize\n"); 987 goto failed; 988 } 989 990 /* 991 * read ufs super block from device 992 */ 993 994 ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size); 995 996 if (!ubh) 997 goto failed; 998 999 usb1 = ubh_get_usb_first(uspi); 1000 usb2 = ubh_get_usb_second(uspi); 1001 usb3 = ubh_get_usb_third(uspi); 1002 1003 /* Sort out mod used on SunOS 4.1.3 for fs_state */ 1004 uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat); 1005 if (((flags & UFS_ST_MASK) == UFS_ST_SUNOS) && 1006 (uspi->s_postblformat != UFS_42POSTBLFMT)) { 1007 flags &= ~UFS_ST_MASK; 1008 flags |= UFS_ST_SUN; 1009 } 1010 1011 if ((flags & UFS_ST_MASK) == UFS_ST_44BSD && 1012 uspi->s_postblformat == UFS_42POSTBLFMT) { 1013 if (!silent) 1014 pr_err("this is not a 44bsd filesystem"); 1015 goto failed; 1016 } 1017 1018 /* 1019 * Check ufs magic number 1020 */ 1021 sbi->s_bytesex = BYTESEX_LE; 1022 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) { 1023 case UFS_MAGIC: 1024 case UFS_MAGIC_BW: 1025 case UFS2_MAGIC: 1026 case UFS_MAGIC_LFN: 1027 case UFS_MAGIC_FEA: 1028 case UFS_MAGIC_4GB: 1029 goto magic_found; 1030 } 1031 sbi->s_bytesex = BYTESEX_BE; 1032 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) { 1033 case UFS_MAGIC: 1034 case UFS_MAGIC_BW: 1035 case UFS2_MAGIC: 1036 case UFS_MAGIC_LFN: 1037 case UFS_MAGIC_FEA: 1038 case UFS_MAGIC_4GB: 1039 goto magic_found; 1040 } 1041 1042 if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP) 1043 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD) 1044 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP)) 1045 && uspi->s_sbbase < 256) { 1046 ubh_brelse_uspi(uspi); 1047 ubh = NULL; 1048 uspi->s_sbbase += 8; 1049 goto again; 1050 } 1051 if (!silent) 1052 pr_err("%s(): bad magic number\n", __func__); 1053 goto failed; 1054 1055 magic_found: 1056 /* 1057 * Check block and fragment sizes 1058 */ 1059 uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize); 1060 uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize); 1061 uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize); 1062 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask); 1063 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift); 1064 1065 if (!is_power_of_2(uspi->s_fsize)) { 1066 pr_err("%s(): fragment size %u is not a power of 2\n", 1067 __func__, uspi->s_fsize); 1068 goto failed; 1069 } 1070 if (uspi->s_fsize < 512) { 1071 pr_err("%s(): fragment size %u is too small\n", 1072 __func__, uspi->s_fsize); 1073 goto failed; 1074 } 1075 if (uspi->s_fsize > 4096) { 1076 pr_err("%s(): fragment size %u is too large\n", 1077 __func__, uspi->s_fsize); 1078 goto failed; 1079 } 1080 if (!is_power_of_2(uspi->s_bsize)) { 1081 pr_err("%s(): block size %u is not a power of 2\n", 1082 __func__, uspi->s_bsize); 1083 goto failed; 1084 } 1085 if (uspi->s_bsize < 4096) { 1086 pr_err("%s(): block size %u is too small\n", 1087 __func__, uspi->s_bsize); 1088 goto failed; 1089 } 1090 if (uspi->s_bsize / uspi->s_fsize > 8) { 1091 pr_err("%s(): too many fragments per block (%u)\n", 1092 __func__, uspi->s_bsize / uspi->s_fsize); 1093 goto failed; 1094 } 1095 if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) { 1096 ubh_brelse_uspi(uspi); 1097 ubh = NULL; 1098 block_size = uspi->s_fsize; 1099 super_block_size = uspi->s_sbsize; 1100 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size); 1101 goto again; 1102 } 1103 1104 sbi->s_flags = flags;/*after that line some functions use s_flags*/ 1105 ufs_print_super_stuff(sb, usb1, usb2, usb3); 1106 1107 /* 1108 * Check, if file system was correctly unmounted. 1109 * If not, make it read only. 1110 */ 1111 if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) || 1112 ((flags & UFS_ST_MASK) == UFS_ST_OLD) || 1113 (((flags & UFS_ST_MASK) == UFS_ST_SUN || 1114 (flags & UFS_ST_MASK) == UFS_ST_SUNOS || 1115 (flags & UFS_ST_MASK) == UFS_ST_SUNx86) && 1116 (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) { 1117 switch(usb1->fs_clean) { 1118 case UFS_FSCLEAN: 1119 UFSD("fs is clean\n"); 1120 break; 1121 case UFS_FSSTABLE: 1122 UFSD("fs is stable\n"); 1123 break; 1124 case UFS_FSLOG: 1125 UFSD("fs is logging fs\n"); 1126 break; 1127 case UFS_FSOSF1: 1128 UFSD("fs is DEC OSF/1\n"); 1129 break; 1130 case UFS_FSACTIVE: 1131 pr_err("%s(): fs is active\n", __func__); 1132 sb->s_flags |= SB_RDONLY; 1133 break; 1134 case UFS_FSBAD: 1135 pr_err("%s(): fs is bad\n", __func__); 1136 sb->s_flags |= SB_RDONLY; 1137 break; 1138 default: 1139 pr_err("%s(): can't grok fs_clean 0x%x\n", 1140 __func__, usb1->fs_clean); 1141 sb->s_flags |= SB_RDONLY; 1142 break; 1143 } 1144 } else { 1145 pr_err("%s(): fs needs fsck\n", __func__); 1146 sb->s_flags |= SB_RDONLY; 1147 } 1148 1149 /* 1150 * Read ufs_super_block into internal data structures 1151 */ 1152 sb->s_op = &ufs_super_ops; 1153 sb->s_export_op = &ufs_export_ops; 1154 1155 sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic); 1156 1157 uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno); 1158 uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno); 1159 uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno); 1160 uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno); 1161 uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset); 1162 uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask); 1163 1164 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { 1165 uspi->s_size = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size); 1166 uspi->s_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize); 1167 } else { 1168 uspi->s_size = fs32_to_cpu(sb, usb1->fs_size); 1169 uspi->s_dsize = fs32_to_cpu(sb, usb1->fs_dsize); 1170 } 1171 1172 uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg); 1173 /* s_bsize already set */ 1174 /* s_fsize already set */ 1175 uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag); 1176 uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree); 1177 uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask); 1178 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask); 1179 uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift); 1180 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift); 1181 UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift, 1182 uspi->s_fshift); 1183 uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift); 1184 uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb); 1185 /* s_sbsize already set */ 1186 uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask); 1187 uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift); 1188 uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir); 1189 uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb); 1190 uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf); 1191 uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3); 1192 uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave); 1193 uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew); 1194 1195 if (uspi->fs_magic == UFS2_MAGIC) 1196 uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr); 1197 else 1198 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr); 1199 1200 uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize); 1201 uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize); 1202 uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak); 1203 uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect); 1204 uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc); 1205 uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg); 1206 uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg); 1207 uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc); 1208 uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize); 1209 uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3); 1210 uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3); 1211 uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos); 1212 uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff); 1213 uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff); 1214 1215 uspi->s_root_blocks = mul_u64_u32_div(uspi->s_dsize, 1216 uspi->s_minfree, 100); 1217 if (uspi->s_minfree <= 5) { 1218 uspi->s_time_to_space = ~0ULL; 1219 uspi->s_space_to_time = 0; 1220 usb1->fs_optim = cpu_to_fs32(sb, UFS_OPTSPACE); 1221 } else { 1222 uspi->s_time_to_space = (uspi->s_root_blocks / 2) + 1; 1223 uspi->s_space_to_time = mul_u64_u32_div(uspi->s_dsize, 1224 uspi->s_minfree - 2, 100) - 1; 1225 } 1226 1227 /* 1228 * Compute another frequently used values 1229 */ 1230 uspi->s_fpbmask = uspi->s_fpb - 1; 1231 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) 1232 uspi->s_apbshift = uspi->s_bshift - 3; 1233 else 1234 uspi->s_apbshift = uspi->s_bshift - 2; 1235 1236 uspi->s_2apbshift = uspi->s_apbshift * 2; 1237 uspi->s_3apbshift = uspi->s_apbshift * 3; 1238 uspi->s_apb = 1 << uspi->s_apbshift; 1239 uspi->s_2apb = 1 << uspi->s_2apbshift; 1240 uspi->s_3apb = 1 << uspi->s_3apbshift; 1241 uspi->s_apbmask = uspi->s_apb - 1; 1242 uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS; 1243 uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift; 1244 uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift; 1245 uspi->s_bpf = uspi->s_fsize << 3; 1246 uspi->s_bpfshift = uspi->s_fshift + 3; 1247 uspi->s_bpfmask = uspi->s_bpf - 1; 1248 if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_44BSD || 1249 (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_UFS2) 1250 uspi->s_maxsymlinklen = 1251 fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen); 1252 1253 if (uspi->fs_magic == UFS2_MAGIC) 1254 maxsymlen = 2 * 4 * (UFS_NDADDR + UFS_NINDIR); 1255 else 1256 maxsymlen = 4 * (UFS_NDADDR + UFS_NINDIR); 1257 if (uspi->s_maxsymlinklen > maxsymlen) { 1258 ufs_warning(sb, __func__, "ufs_read_super: excessive maximum " 1259 "fast symlink size (%u)\n", uspi->s_maxsymlinklen); 1260 uspi->s_maxsymlinklen = maxsymlen; 1261 } 1262 sb->s_maxbytes = ufs_max_bytes(sb); 1263 sb->s_max_links = UFS_LINK_MAX; 1264 1265 inode = ufs_iget(sb, UFS_ROOTINO); 1266 if (IS_ERR(inode)) { 1267 ret = PTR_ERR(inode); 1268 goto failed; 1269 } 1270 sb->s_root = d_make_root(inode); 1271 if (!sb->s_root) { 1272 ret = -ENOMEM; 1273 goto failed; 1274 } 1275 1276 ufs_setup_cstotal(sb); 1277 /* 1278 * Read cylinder group structures 1279 */ 1280 if (!sb_rdonly(sb)) 1281 if (!ufs_read_cylinder_structures(sb)) 1282 goto failed; 1283 1284 UFSD("EXIT\n"); 1285 return 0; 1286 1287 failed: 1288 if (ubh) 1289 ubh_brelse_uspi (uspi); 1290 kfree (uspi); 1291 kfree(sbi); 1292 sb->s_fs_info = NULL; 1293 UFSD("EXIT (FAILED)\n"); 1294 return ret; 1295 1296 failed_nomem: 1297 UFSD("EXIT (NOMEM)\n"); 1298 return -ENOMEM; 1299 } 1300 1301 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data) 1302 { 1303 struct ufs_sb_private_info * uspi; 1304 struct ufs_super_block_first * usb1; 1305 struct ufs_super_block_third * usb3; 1306 unsigned new_mount_opt, ufstype; 1307 unsigned flags; 1308 1309 sync_filesystem(sb); 1310 mutex_lock(&UFS_SB(sb)->s_lock); 1311 uspi = UFS_SB(sb)->s_uspi; 1312 flags = UFS_SB(sb)->s_flags; 1313 usb1 = ubh_get_usb_first(uspi); 1314 usb3 = ubh_get_usb_third(uspi); 1315 1316 /* 1317 * Allow the "check" option to be passed as a remount option. 1318 * It is not possible to change ufstype option during remount 1319 */ 1320 ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE; 1321 new_mount_opt = 0; 1322 ufs_set_opt (new_mount_opt, ONERROR_LOCK); 1323 if (!ufs_parse_options (data, &new_mount_opt)) { 1324 mutex_unlock(&UFS_SB(sb)->s_lock); 1325 return -EINVAL; 1326 } 1327 if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) { 1328 new_mount_opt |= ufstype; 1329 } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) { 1330 pr_err("ufstype can't be changed during remount\n"); 1331 mutex_unlock(&UFS_SB(sb)->s_lock); 1332 return -EINVAL; 1333 } 1334 1335 if ((bool)(*mount_flags & SB_RDONLY) == sb_rdonly(sb)) { 1336 UFS_SB(sb)->s_mount_opt = new_mount_opt; 1337 mutex_unlock(&UFS_SB(sb)->s_lock); 1338 return 0; 1339 } 1340 1341 /* 1342 * fs was mouted as rw, remounting ro 1343 */ 1344 if (*mount_flags & SB_RDONLY) { 1345 ufs_put_super_internal(sb); 1346 usb1->fs_time = ufs_get_seconds(sb); 1347 if ((flags & UFS_ST_MASK) == UFS_ST_SUN 1348 || (flags & UFS_ST_MASK) == UFS_ST_SUNOS 1349 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86) 1350 ufs_set_fs_state(sb, usb1, usb3, 1351 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time)); 1352 ubh_mark_buffer_dirty (USPI_UBH(uspi)); 1353 sb->s_flags |= SB_RDONLY; 1354 } else { 1355 /* 1356 * fs was mounted as ro, remounting rw 1357 */ 1358 #ifndef CONFIG_UFS_FS_WRITE 1359 pr_err("ufs was compiled with read-only support, can't be mounted as read-write\n"); 1360 mutex_unlock(&UFS_SB(sb)->s_lock); 1361 return -EINVAL; 1362 #else 1363 if (ufstype != UFS_MOUNT_UFSTYPE_SUN && 1364 ufstype != UFS_MOUNT_UFSTYPE_SUNOS && 1365 ufstype != UFS_MOUNT_UFSTYPE_44BSD && 1366 ufstype != UFS_MOUNT_UFSTYPE_SUNx86 && 1367 ufstype != UFS_MOUNT_UFSTYPE_UFS2) { 1368 pr_err("this ufstype is read-only supported\n"); 1369 mutex_unlock(&UFS_SB(sb)->s_lock); 1370 return -EINVAL; 1371 } 1372 if (!ufs_read_cylinder_structures(sb)) { 1373 pr_err("failed during remounting\n"); 1374 mutex_unlock(&UFS_SB(sb)->s_lock); 1375 return -EPERM; 1376 } 1377 sb->s_flags &= ~SB_RDONLY; 1378 #endif 1379 } 1380 UFS_SB(sb)->s_mount_opt = new_mount_opt; 1381 mutex_unlock(&UFS_SB(sb)->s_lock); 1382 return 0; 1383 } 1384 1385 static int ufs_show_options(struct seq_file *seq, struct dentry *root) 1386 { 1387 struct ufs_sb_info *sbi = UFS_SB(root->d_sb); 1388 unsigned mval = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE; 1389 const struct match_token *tp = tokens; 1390 1391 while (tp->token != Opt_onerror_panic && tp->token != mval) 1392 ++tp; 1393 BUG_ON(tp->token == Opt_onerror_panic); 1394 seq_printf(seq, ",%s", tp->pattern); 1395 1396 mval = sbi->s_mount_opt & UFS_MOUNT_ONERROR; 1397 while (tp->token != Opt_err && tp->token != mval) 1398 ++tp; 1399 BUG_ON(tp->token == Opt_err); 1400 seq_printf(seq, ",%s", tp->pattern); 1401 1402 return 0; 1403 } 1404 1405 static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf) 1406 { 1407 struct super_block *sb = dentry->d_sb; 1408 struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi; 1409 unsigned flags = UFS_SB(sb)->s_flags; 1410 u64 id = huge_encode_dev(sb->s_bdev->bd_dev); 1411 1412 mutex_lock(&UFS_SB(sb)->s_lock); 1413 1414 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) 1415 buf->f_type = UFS2_MAGIC; 1416 else 1417 buf->f_type = UFS_MAGIC; 1418 1419 buf->f_blocks = uspi->s_dsize; 1420 buf->f_bfree = ufs_freefrags(uspi); 1421 buf->f_ffree = uspi->cs_total.cs_nifree; 1422 buf->f_bsize = sb->s_blocksize; 1423 buf->f_bavail = (buf->f_bfree > uspi->s_root_blocks) 1424 ? (buf->f_bfree - uspi->s_root_blocks) : 0; 1425 buf->f_files = uspi->s_ncg * uspi->s_ipg; 1426 buf->f_namelen = UFS_MAXNAMLEN; 1427 buf->f_fsid.val[0] = (u32)id; 1428 buf->f_fsid.val[1] = (u32)(id >> 32); 1429 1430 mutex_unlock(&UFS_SB(sb)->s_lock); 1431 1432 return 0; 1433 } 1434 1435 static struct kmem_cache * ufs_inode_cachep; 1436 1437 static struct inode *ufs_alloc_inode(struct super_block *sb) 1438 { 1439 struct ufs_inode_info *ei; 1440 1441 ei = kmem_cache_alloc(ufs_inode_cachep, GFP_NOFS); 1442 if (!ei) 1443 return NULL; 1444 1445 inode_set_iversion(&ei->vfs_inode, 1); 1446 seqlock_init(&ei->meta_lock); 1447 mutex_init(&ei->truncate_mutex); 1448 return &ei->vfs_inode; 1449 } 1450 1451 static void ufs_free_in_core_inode(struct inode *inode) 1452 { 1453 kmem_cache_free(ufs_inode_cachep, UFS_I(inode)); 1454 } 1455 1456 static void init_once(void *foo) 1457 { 1458 struct ufs_inode_info *ei = (struct ufs_inode_info *) foo; 1459 1460 inode_init_once(&ei->vfs_inode); 1461 } 1462 1463 static int __init init_inodecache(void) 1464 { 1465 ufs_inode_cachep = kmem_cache_create_usercopy("ufs_inode_cache", 1466 sizeof(struct ufs_inode_info), 0, 1467 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD| 1468 SLAB_ACCOUNT), 1469 offsetof(struct ufs_inode_info, i_u1.i_symlink), 1470 sizeof_field(struct ufs_inode_info, 1471 i_u1.i_symlink), 1472 init_once); 1473 if (ufs_inode_cachep == NULL) 1474 return -ENOMEM; 1475 return 0; 1476 } 1477 1478 static void destroy_inodecache(void) 1479 { 1480 /* 1481 * Make sure all delayed rcu free inodes are flushed before we 1482 * destroy cache. 1483 */ 1484 rcu_barrier(); 1485 kmem_cache_destroy(ufs_inode_cachep); 1486 } 1487 1488 static const struct super_operations ufs_super_ops = { 1489 .alloc_inode = ufs_alloc_inode, 1490 .free_inode = ufs_free_in_core_inode, 1491 .write_inode = ufs_write_inode, 1492 .evict_inode = ufs_evict_inode, 1493 .put_super = ufs_put_super, 1494 .sync_fs = ufs_sync_fs, 1495 .statfs = ufs_statfs, 1496 .remount_fs = ufs_remount, 1497 .show_options = ufs_show_options, 1498 }; 1499 1500 static struct dentry *ufs_mount(struct file_system_type *fs_type, 1501 int flags, const char *dev_name, void *data) 1502 { 1503 return mount_bdev(fs_type, flags, dev_name, data, ufs_fill_super); 1504 } 1505 1506 static struct file_system_type ufs_fs_type = { 1507 .owner = THIS_MODULE, 1508 .name = "ufs", 1509 .mount = ufs_mount, 1510 .kill_sb = kill_block_super, 1511 .fs_flags = FS_REQUIRES_DEV, 1512 }; 1513 MODULE_ALIAS_FS("ufs"); 1514 1515 static int __init init_ufs_fs(void) 1516 { 1517 int err = init_inodecache(); 1518 if (err) 1519 goto out1; 1520 err = register_filesystem(&ufs_fs_type); 1521 if (err) 1522 goto out; 1523 return 0; 1524 out: 1525 destroy_inodecache(); 1526 out1: 1527 return err; 1528 } 1529 1530 static void __exit exit_ufs_fs(void) 1531 { 1532 unregister_filesystem(&ufs_fs_type); 1533 destroy_inodecache(); 1534 } 1535 1536 module_init(init_ufs_fs) 1537 module_exit(exit_ufs_fs) 1538 MODULE_LICENSE("GPL"); 1539