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