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/config.h> 68 #include <linux/module.h> 69 #include <linux/bitops.h> 70 71 #include <stdarg.h> 72 73 #include <asm/uaccess.h> 74 #include <asm/system.h> 75 76 #include <linux/errno.h> 77 #include <linux/fs.h> 78 #include <linux/ufs_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/init.h> 85 #include <linux/parser.h> 86 #include <linux/smp_lock.h> 87 #include <linux/buffer_head.h> 88 #include <linux/vfs.h> 89 90 #include "swab.h" 91 #include "util.h" 92 93 #ifdef CONFIG_UFS_DEBUG 94 /* 95 * Print contents of ufs_super_block, useful for debugging 96 */ 97 static void ufs_print_super_stuff(struct super_block *sb, unsigned flags, 98 struct ufs_super_block_first *usb1, 99 struct ufs_super_block_second *usb2, 100 struct ufs_super_block_third *usb3) 101 { 102 printk("ufs_print_super_stuff\n"); 103 printk(" magic: 0x%x\n", fs32_to_cpu(sb, usb3->fs_magic)); 104 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { 105 printk(" fs_size: %llu\n", (unsigned long long) 106 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size)); 107 printk(" fs_dsize: %llu\n", (unsigned long long) 108 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize)); 109 printk(" bsize: %u\n", 110 fs32_to_cpu(sb, usb1->fs_bsize)); 111 printk(" fsize: %u\n", 112 fs32_to_cpu(sb, usb1->fs_fsize)); 113 printk(" fs_volname: %s\n", usb2->fs_un.fs_u2.fs_volname); 114 printk(" fs_sblockloc: %llu\n", (unsigned long long) 115 fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc)); 116 printk(" cs_ndir(No of dirs): %llu\n", (unsigned long long) 117 fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir)); 118 printk(" cs_nbfree(No of free blocks): %llu\n", 119 (unsigned long long) 120 fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree)); 121 } else { 122 printk(" sblkno: %u\n", fs32_to_cpu(sb, usb1->fs_sblkno)); 123 printk(" cblkno: %u\n", fs32_to_cpu(sb, usb1->fs_cblkno)); 124 printk(" iblkno: %u\n", fs32_to_cpu(sb, usb1->fs_iblkno)); 125 printk(" dblkno: %u\n", fs32_to_cpu(sb, usb1->fs_dblkno)); 126 printk(" cgoffset: %u\n", 127 fs32_to_cpu(sb, usb1->fs_cgoffset)); 128 printk(" ~cgmask: 0x%x\n", 129 ~fs32_to_cpu(sb, usb1->fs_cgmask)); 130 printk(" size: %u\n", fs32_to_cpu(sb, usb1->fs_size)); 131 printk(" dsize: %u\n", fs32_to_cpu(sb, usb1->fs_dsize)); 132 printk(" ncg: %u\n", fs32_to_cpu(sb, usb1->fs_ncg)); 133 printk(" bsize: %u\n", fs32_to_cpu(sb, usb1->fs_bsize)); 134 printk(" fsize: %u\n", fs32_to_cpu(sb, usb1->fs_fsize)); 135 printk(" frag: %u\n", fs32_to_cpu(sb, usb1->fs_frag)); 136 printk(" fragshift: %u\n", 137 fs32_to_cpu(sb, usb1->fs_fragshift)); 138 printk(" ~fmask: %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask)); 139 printk(" fshift: %u\n", fs32_to_cpu(sb, usb1->fs_fshift)); 140 printk(" sbsize: %u\n", fs32_to_cpu(sb, usb1->fs_sbsize)); 141 printk(" spc: %u\n", fs32_to_cpu(sb, usb1->fs_spc)); 142 printk(" cpg: %u\n", fs32_to_cpu(sb, usb1->fs_cpg)); 143 printk(" ipg: %u\n", fs32_to_cpu(sb, usb1->fs_ipg)); 144 printk(" fpg: %u\n", fs32_to_cpu(sb, usb1->fs_fpg)); 145 printk(" csaddr: %u\n", fs32_to_cpu(sb, usb1->fs_csaddr)); 146 printk(" cssize: %u\n", fs32_to_cpu(sb, usb1->fs_cssize)); 147 printk(" cgsize: %u\n", fs32_to_cpu(sb, usb1->fs_cgsize)); 148 printk(" fstodb: %u\n", 149 fs32_to_cpu(sb, usb1->fs_fsbtodb)); 150 printk(" nrpos: %u\n", fs32_to_cpu(sb, usb3->fs_nrpos)); 151 printk(" ndir %u\n", 152 fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir)); 153 printk(" nifree %u\n", 154 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree)); 155 printk(" nbfree %u\n", 156 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree)); 157 printk(" nffree %u\n", 158 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree)); 159 } 160 printk("\n"); 161 } 162 163 /* 164 * Print contents of ufs_cylinder_group, useful for debugging 165 */ 166 static void ufs_print_cylinder_stuff(struct super_block *sb, 167 struct ufs_cylinder_group *cg) 168 { 169 printk("\nufs_print_cylinder_stuff\n"); 170 printk("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group)); 171 printk(" magic: %x\n", fs32_to_cpu(sb, cg->cg_magic)); 172 printk(" time: %u\n", fs32_to_cpu(sb, cg->cg_time)); 173 printk(" cgx: %u\n", fs32_to_cpu(sb, cg->cg_cgx)); 174 printk(" ncyl: %u\n", fs16_to_cpu(sb, cg->cg_ncyl)); 175 printk(" niblk: %u\n", fs16_to_cpu(sb, cg->cg_niblk)); 176 printk(" ndblk: %u\n", fs32_to_cpu(sb, cg->cg_ndblk)); 177 printk(" cs_ndir: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir)); 178 printk(" cs_nbfree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree)); 179 printk(" cs_nifree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree)); 180 printk(" cs_nffree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree)); 181 printk(" rotor: %u\n", fs32_to_cpu(sb, cg->cg_rotor)); 182 printk(" frotor: %u\n", fs32_to_cpu(sb, cg->cg_frotor)); 183 printk(" irotor: %u\n", fs32_to_cpu(sb, cg->cg_irotor)); 184 printk(" frsum: %u, %u, %u, %u, %u, %u, %u, %u\n", 185 fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]), 186 fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]), 187 fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]), 188 fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7])); 189 printk(" btotoff: %u\n", fs32_to_cpu(sb, cg->cg_btotoff)); 190 printk(" boff: %u\n", fs32_to_cpu(sb, cg->cg_boff)); 191 printk(" iuseoff: %u\n", fs32_to_cpu(sb, cg->cg_iusedoff)); 192 printk(" freeoff: %u\n", fs32_to_cpu(sb, cg->cg_freeoff)); 193 printk(" nextfreeoff: %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff)); 194 printk(" clustersumoff %u\n", 195 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff)); 196 printk(" clusteroff %u\n", 197 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff)); 198 printk(" nclusterblks %u\n", 199 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks)); 200 printk("\n"); 201 } 202 #else 203 # define ufs_print_super_stuff(sb, flags, usb1, usb2, usb3) /**/ 204 # define ufs_print_cylinder_stuff(sb, cg) /**/ 205 #endif /* CONFIG_UFS_DEBUG */ 206 207 static struct super_operations ufs_super_ops; 208 209 static char error_buf[1024]; 210 211 void ufs_error (struct super_block * sb, const char * function, 212 const char * fmt, ...) 213 { 214 struct ufs_sb_private_info * uspi; 215 struct ufs_super_block_first * usb1; 216 va_list args; 217 218 uspi = UFS_SB(sb)->s_uspi; 219 usb1 = ubh_get_usb_first(uspi); 220 221 if (!(sb->s_flags & MS_RDONLY)) { 222 usb1->fs_clean = UFS_FSBAD; 223 ubh_mark_buffer_dirty(USPI_UBH(uspi)); 224 sb->s_dirt = 1; 225 sb->s_flags |= MS_RDONLY; 226 } 227 va_start (args, fmt); 228 vsprintf (error_buf, fmt, args); 229 va_end (args); 230 switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) { 231 case UFS_MOUNT_ONERROR_PANIC: 232 panic ("UFS-fs panic (device %s): %s: %s\n", 233 sb->s_id, function, error_buf); 234 235 case UFS_MOUNT_ONERROR_LOCK: 236 case UFS_MOUNT_ONERROR_UMOUNT: 237 case UFS_MOUNT_ONERROR_REPAIR: 238 printk (KERN_CRIT "UFS-fs error (device %s): %s: %s\n", 239 sb->s_id, function, error_buf); 240 } 241 } 242 243 void ufs_panic (struct super_block * sb, const char * function, 244 const char * fmt, ...) 245 { 246 struct ufs_sb_private_info * uspi; 247 struct ufs_super_block_first * usb1; 248 va_list args; 249 250 uspi = UFS_SB(sb)->s_uspi; 251 usb1 = ubh_get_usb_first(uspi); 252 253 if (!(sb->s_flags & MS_RDONLY)) { 254 usb1->fs_clean = UFS_FSBAD; 255 ubh_mark_buffer_dirty(USPI_UBH(uspi)); 256 sb->s_dirt = 1; 257 } 258 va_start (args, fmt); 259 vsprintf (error_buf, fmt, args); 260 va_end (args); 261 sb->s_flags |= MS_RDONLY; 262 printk (KERN_CRIT "UFS-fs panic (device %s): %s: %s\n", 263 sb->s_id, function, error_buf); 264 } 265 266 void ufs_warning (struct super_block * sb, const char * function, 267 const char * fmt, ...) 268 { 269 va_list args; 270 271 va_start (args, fmt); 272 vsprintf (error_buf, fmt, args); 273 va_end (args); 274 printk (KERN_WARNING "UFS-fs warning (device %s): %s: %s\n", 275 sb->s_id, function, error_buf); 276 } 277 278 enum { 279 Opt_type_old, Opt_type_sunx86, Opt_type_sun, Opt_type_44bsd, 280 Opt_type_ufs2, Opt_type_hp, Opt_type_nextstepcd, Opt_type_nextstep, 281 Opt_type_openstep, Opt_onerror_panic, Opt_onerror_lock, 282 Opt_onerror_umount, Opt_onerror_repair, Opt_err 283 }; 284 285 static match_table_t tokens = { 286 {Opt_type_old, "ufstype=old"}, 287 {Opt_type_sunx86, "ufstype=sunx86"}, 288 {Opt_type_sun, "ufstype=sun"}, 289 {Opt_type_44bsd, "ufstype=44bsd"}, 290 {Opt_type_ufs2, "ufstype=ufs2"}, 291 {Opt_type_ufs2, "ufstype=5xbsd"}, 292 {Opt_type_hp, "ufstype=hp"}, 293 {Opt_type_nextstepcd, "ufstype=nextstep-cd"}, 294 {Opt_type_nextstep, "ufstype=nextstep"}, 295 {Opt_type_openstep, "ufstype=openstep"}, 296 {Opt_onerror_panic, "onerror=panic"}, 297 {Opt_onerror_lock, "onerror=lock"}, 298 {Opt_onerror_umount, "onerror=umount"}, 299 {Opt_onerror_repair, "onerror=repair"}, 300 {Opt_err, NULL} 301 }; 302 303 static int ufs_parse_options (char * options, unsigned * mount_options) 304 { 305 char * p; 306 307 UFSD("ENTER\n"); 308 309 if (!options) 310 return 1; 311 312 while ((p = strsep(&options, ",")) != NULL) { 313 substring_t args[MAX_OPT_ARGS]; 314 int token; 315 if (!*p) 316 continue; 317 318 token = match_token(p, tokens, args); 319 switch (token) { 320 case Opt_type_old: 321 ufs_clear_opt (*mount_options, UFSTYPE); 322 ufs_set_opt (*mount_options, UFSTYPE_OLD); 323 break; 324 case Opt_type_sunx86: 325 ufs_clear_opt (*mount_options, UFSTYPE); 326 ufs_set_opt (*mount_options, UFSTYPE_SUNx86); 327 break; 328 case Opt_type_sun: 329 ufs_clear_opt (*mount_options, UFSTYPE); 330 ufs_set_opt (*mount_options, UFSTYPE_SUN); 331 break; 332 case Opt_type_44bsd: 333 ufs_clear_opt (*mount_options, UFSTYPE); 334 ufs_set_opt (*mount_options, UFSTYPE_44BSD); 335 break; 336 case Opt_type_ufs2: 337 ufs_clear_opt(*mount_options, UFSTYPE); 338 ufs_set_opt(*mount_options, UFSTYPE_UFS2); 339 break; 340 case Opt_type_hp: 341 ufs_clear_opt (*mount_options, UFSTYPE); 342 ufs_set_opt (*mount_options, UFSTYPE_HP); 343 break; 344 case Opt_type_nextstepcd: 345 ufs_clear_opt (*mount_options, UFSTYPE); 346 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD); 347 break; 348 case Opt_type_nextstep: 349 ufs_clear_opt (*mount_options, UFSTYPE); 350 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP); 351 break; 352 case Opt_type_openstep: 353 ufs_clear_opt (*mount_options, UFSTYPE); 354 ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP); 355 break; 356 case Opt_onerror_panic: 357 ufs_clear_opt (*mount_options, ONERROR); 358 ufs_set_opt (*mount_options, ONERROR_PANIC); 359 break; 360 case Opt_onerror_lock: 361 ufs_clear_opt (*mount_options, ONERROR); 362 ufs_set_opt (*mount_options, ONERROR_LOCK); 363 break; 364 case Opt_onerror_umount: 365 ufs_clear_opt (*mount_options, ONERROR); 366 ufs_set_opt (*mount_options, ONERROR_UMOUNT); 367 break; 368 case Opt_onerror_repair: 369 printk("UFS-fs: Unable to do repair on error, " 370 "will lock lock instead\n"); 371 ufs_clear_opt (*mount_options, ONERROR); 372 ufs_set_opt (*mount_options, ONERROR_REPAIR); 373 break; 374 default: 375 printk("UFS-fs: Invalid option: \"%s\" " 376 "or missing value\n", p); 377 return 0; 378 } 379 } 380 return 1; 381 } 382 383 /* 384 * Diffrent types of UFS hold fs_cstotal in different 385 * places, and use diffrent data structure for it. 386 * To make things simplier we just copy fs_cstotal to ufs_sb_private_info 387 */ 388 static void ufs_setup_cstotal(struct super_block *sb) 389 { 390 struct ufs_sb_info *sbi = UFS_SB(sb); 391 struct ufs_sb_private_info *uspi = sbi->s_uspi; 392 struct ufs_super_block_first *usb1; 393 struct ufs_super_block_second *usb2; 394 struct ufs_super_block_third *usb3; 395 unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE; 396 397 UFSD("ENTER, mtype=%u\n", mtype); 398 usb1 = ubh_get_usb_first(uspi); 399 usb2 = ubh_get_usb_second(uspi); 400 usb3 = ubh_get_usb_third(uspi); 401 402 if ((mtype == UFS_MOUNT_UFSTYPE_44BSD && 403 (usb1->fs_flags & UFS_FLAGS_UPDATED)) || 404 mtype == UFS_MOUNT_UFSTYPE_UFS2) { 405 /*we have statistic in different place, then usual*/ 406 uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir); 407 uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree); 408 uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree); 409 uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree); 410 } else { 411 uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir); 412 uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree); 413 uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree); 414 uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree); 415 } 416 UFSD("EXIT\n"); 417 } 418 419 /* 420 * Read on-disk structures associated with cylinder groups 421 */ 422 static int ufs_read_cylinder_structures(struct super_block *sb) 423 { 424 struct ufs_sb_info *sbi = UFS_SB(sb); 425 struct ufs_sb_private_info *uspi = sbi->s_uspi; 426 unsigned flags = sbi->s_flags; 427 struct ufs_buffer_head * ubh; 428 unsigned char * base, * space; 429 unsigned size, blks, i; 430 struct ufs_super_block_third *usb3; 431 432 UFSD("ENTER\n"); 433 434 usb3 = ubh_get_usb_third(uspi); 435 /* 436 * Read cs structures from (usually) first data block 437 * on the device. 438 */ 439 size = uspi->s_cssize; 440 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift; 441 base = space = kmalloc(size, GFP_KERNEL); 442 if (!base) 443 goto failed; 444 sbi->s_csp = (struct ufs_csum *)space; 445 for (i = 0; i < blks; i += uspi->s_fpb) { 446 size = uspi->s_bsize; 447 if (i + uspi->s_fpb > blks) 448 size = (blks - i) * uspi->s_fsize; 449 450 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) 451 ubh = ubh_bread(sb, 452 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr) + i, size); 453 else 454 ubh = ubh_bread(sb, uspi->s_csaddr + i, size); 455 456 if (!ubh) 457 goto failed; 458 459 ubh_ubhcpymem (space, ubh, size); 460 461 space += size; 462 ubh_brelse (ubh); 463 ubh = NULL; 464 } 465 466 /* 467 * Read cylinder group (we read only first fragment from block 468 * at this time) and prepare internal data structures for cg caching. 469 */ 470 if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_KERNEL))) 471 goto failed; 472 for (i = 0; i < uspi->s_ncg; i++) 473 sbi->s_ucg[i] = NULL; 474 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) { 475 sbi->s_ucpi[i] = NULL; 476 sbi->s_cgno[i] = UFS_CGNO_EMPTY; 477 } 478 for (i = 0; i < uspi->s_ncg; i++) { 479 UFSD("read cg %u\n", i); 480 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i)))) 481 goto failed; 482 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data)) 483 goto failed; 484 485 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data); 486 } 487 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) { 488 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_KERNEL))) 489 goto failed; 490 sbi->s_cgno[i] = UFS_CGNO_EMPTY; 491 } 492 sbi->s_cg_loaded = 0; 493 UFSD("EXIT\n"); 494 return 1; 495 496 failed: 497 kfree (base); 498 if (sbi->s_ucg) { 499 for (i = 0; i < uspi->s_ncg; i++) 500 if (sbi->s_ucg[i]) 501 brelse (sbi->s_ucg[i]); 502 kfree (sbi->s_ucg); 503 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) 504 kfree (sbi->s_ucpi[i]); 505 } 506 UFSD("EXIT (FAILED)\n"); 507 return 0; 508 } 509 510 /* 511 * Sync our internal copy of fs_cstotal with disk 512 */ 513 static void ufs_put_cstotal(struct super_block *sb) 514 { 515 unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE; 516 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 517 struct ufs_super_block_first *usb1; 518 struct ufs_super_block_second *usb2; 519 struct ufs_super_block_third *usb3; 520 521 UFSD("ENTER\n"); 522 usb1 = ubh_get_usb_first(uspi); 523 usb2 = ubh_get_usb_second(uspi); 524 usb3 = ubh_get_usb_third(uspi); 525 526 if ((mtype == UFS_MOUNT_UFSTYPE_44BSD && 527 (usb1->fs_flags & UFS_FLAGS_UPDATED)) || 528 mtype == UFS_MOUNT_UFSTYPE_UFS2) { 529 /*we have statistic in different place, then usual*/ 530 usb2->fs_un.fs_u2.cs_ndir = 531 cpu_to_fs64(sb, uspi->cs_total.cs_ndir); 532 usb2->fs_un.fs_u2.cs_nbfree = 533 cpu_to_fs64(sb, uspi->cs_total.cs_nbfree); 534 usb3->fs_un1.fs_u2.cs_nifree = 535 cpu_to_fs64(sb, uspi->cs_total.cs_nifree); 536 usb3->fs_un1.fs_u2.cs_nffree = 537 cpu_to_fs64(sb, uspi->cs_total.cs_nffree); 538 } else { 539 usb1->fs_cstotal.cs_ndir = 540 cpu_to_fs32(sb, uspi->cs_total.cs_ndir); 541 usb1->fs_cstotal.cs_nbfree = 542 cpu_to_fs32(sb, uspi->cs_total.cs_nbfree); 543 usb1->fs_cstotal.cs_nifree = 544 cpu_to_fs32(sb, uspi->cs_total.cs_nifree); 545 usb1->fs_cstotal.cs_nffree = 546 cpu_to_fs32(sb, uspi->cs_total.cs_nffree); 547 } 548 ubh_mark_buffer_dirty(USPI_UBH(uspi)); 549 UFSD("EXIT\n"); 550 } 551 552 /** 553 * ufs_put_super_internal() - put on-disk intrenal structures 554 * @sb: pointer to super_block structure 555 * Put on-disk structures associated with cylinder groups 556 * and write them back to disk, also update cs_total on disk 557 */ 558 static void ufs_put_super_internal(struct super_block *sb) 559 { 560 struct ufs_sb_info *sbi = UFS_SB(sb); 561 struct ufs_sb_private_info *uspi = sbi->s_uspi; 562 struct ufs_buffer_head * ubh; 563 unsigned char * base, * space; 564 unsigned blks, size, i; 565 566 567 UFSD("ENTER\n"); 568 ufs_put_cstotal(sb); 569 size = uspi->s_cssize; 570 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift; 571 base = space = (char*) sbi->s_csp; 572 for (i = 0; i < blks; i += uspi->s_fpb) { 573 size = uspi->s_bsize; 574 if (i + uspi->s_fpb > blks) 575 size = (blks - i) * uspi->s_fsize; 576 ubh = ubh_bread(sb, uspi->s_csaddr + i, size); 577 ubh_memcpyubh (ubh, space, size); 578 space += size; 579 ubh_mark_buffer_uptodate (ubh, 1); 580 ubh_mark_buffer_dirty (ubh); 581 ubh_brelse (ubh); 582 } 583 for (i = 0; i < sbi->s_cg_loaded; i++) { 584 ufs_put_cylinder (sb, i); 585 kfree (sbi->s_ucpi[i]); 586 } 587 for (; i < UFS_MAX_GROUP_LOADED; i++) 588 kfree (sbi->s_ucpi[i]); 589 for (i = 0; i < uspi->s_ncg; i++) 590 brelse (sbi->s_ucg[i]); 591 kfree (sbi->s_ucg); 592 kfree (base); 593 UFSD("EXIT\n"); 594 } 595 596 static int ufs_fill_super(struct super_block *sb, void *data, int silent) 597 { 598 struct ufs_sb_info * sbi; 599 struct ufs_sb_private_info * uspi; 600 struct ufs_super_block_first * usb1; 601 struct ufs_super_block_second * usb2; 602 struct ufs_super_block_third * usb3; 603 struct ufs_buffer_head * ubh; 604 struct inode *inode; 605 unsigned block_size, super_block_size; 606 unsigned flags; 607 unsigned super_block_offset; 608 609 uspi = NULL; 610 ubh = NULL; 611 flags = 0; 612 613 UFSD("ENTER\n"); 614 615 sbi = kmalloc(sizeof(struct ufs_sb_info), GFP_KERNEL); 616 if (!sbi) 617 goto failed_nomem; 618 sb->s_fs_info = sbi; 619 memset(sbi, 0, sizeof(struct ufs_sb_info)); 620 621 UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY)); 622 623 #ifndef CONFIG_UFS_FS_WRITE 624 if (!(sb->s_flags & MS_RDONLY)) { 625 printk("ufs was compiled with read-only support, " 626 "can't be mounted as read-write\n"); 627 goto failed; 628 } 629 #endif 630 /* 631 * Set default mount options 632 * Parse mount options 633 */ 634 sbi->s_mount_opt = 0; 635 ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK); 636 if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) { 637 printk("wrong mount options\n"); 638 goto failed; 639 } 640 if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) { 641 if (!silent) 642 printk("You didn't specify the type of your ufs filesystem\n\n" 643 "mount -t ufs -o ufstype=" 644 "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n" 645 ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, " 646 "default is ufstype=old\n"); 647 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD); 648 } 649 650 sbi->s_uspi = uspi = 651 kmalloc (sizeof(struct ufs_sb_private_info), GFP_KERNEL); 652 if (!uspi) 653 goto failed; 654 655 super_block_offset=UFS_SBLOCK; 656 657 /* Keep 2Gig file limit. Some UFS variants need to override 658 this but as I don't know which I'll let those in the know loosen 659 the rules */ 660 switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) { 661 case UFS_MOUNT_UFSTYPE_44BSD: 662 UFSD("ufstype=44bsd\n"); 663 uspi->s_fsize = block_size = 512; 664 uspi->s_fmask = ~(512 - 1); 665 uspi->s_fshift = 9; 666 uspi->s_sbsize = super_block_size = 1536; 667 uspi->s_sbbase = 0; 668 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; 669 break; 670 case UFS_MOUNT_UFSTYPE_UFS2: 671 UFSD("ufstype=ufs2\n"); 672 super_block_offset=SBLOCK_UFS2; 673 uspi->s_fsize = block_size = 512; 674 uspi->s_fmask = ~(512 - 1); 675 uspi->s_fshift = 9; 676 uspi->s_sbsize = super_block_size = 1536; 677 uspi->s_sbbase = 0; 678 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; 679 if (!(sb->s_flags & MS_RDONLY)) { 680 printk(KERN_INFO "ufstype=ufs2 is supported read-only\n"); 681 sb->s_flags |= MS_RDONLY; 682 } 683 break; 684 685 case UFS_MOUNT_UFSTYPE_SUN: 686 UFSD("ufstype=sun\n"); 687 uspi->s_fsize = block_size = 1024; 688 uspi->s_fmask = ~(1024 - 1); 689 uspi->s_fshift = 10; 690 uspi->s_sbsize = super_block_size = 2048; 691 uspi->s_sbbase = 0; 692 uspi->s_maxsymlinklen = 56; 693 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN; 694 break; 695 696 case UFS_MOUNT_UFSTYPE_SUNx86: 697 UFSD("ufstype=sunx86\n"); 698 uspi->s_fsize = block_size = 1024; 699 uspi->s_fmask = ~(1024 - 1); 700 uspi->s_fshift = 10; 701 uspi->s_sbsize = super_block_size = 2048; 702 uspi->s_sbbase = 0; 703 uspi->s_maxsymlinklen = 56; 704 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN; 705 break; 706 707 case UFS_MOUNT_UFSTYPE_OLD: 708 UFSD("ufstype=old\n"); 709 uspi->s_fsize = block_size = 1024; 710 uspi->s_fmask = ~(1024 - 1); 711 uspi->s_fshift = 10; 712 uspi->s_sbsize = super_block_size = 2048; 713 uspi->s_sbbase = 0; 714 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 715 if (!(sb->s_flags & MS_RDONLY)) { 716 if (!silent) 717 printk(KERN_INFO "ufstype=old is supported read-only\n"); 718 sb->s_flags |= MS_RDONLY; 719 } 720 break; 721 722 case UFS_MOUNT_UFSTYPE_NEXTSTEP: 723 UFSD("ufstype=nextstep\n"); 724 uspi->s_fsize = block_size = 1024; 725 uspi->s_fmask = ~(1024 - 1); 726 uspi->s_fshift = 10; 727 uspi->s_sbsize = super_block_size = 2048; 728 uspi->s_sbbase = 0; 729 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 730 if (!(sb->s_flags & MS_RDONLY)) { 731 if (!silent) 732 printk(KERN_INFO "ufstype=nextstep is supported read-only\n"); 733 sb->s_flags |= MS_RDONLY; 734 } 735 break; 736 737 case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD: 738 UFSD("ufstype=nextstep-cd\n"); 739 uspi->s_fsize = block_size = 2048; 740 uspi->s_fmask = ~(2048 - 1); 741 uspi->s_fshift = 11; 742 uspi->s_sbsize = super_block_size = 2048; 743 uspi->s_sbbase = 0; 744 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 745 if (!(sb->s_flags & MS_RDONLY)) { 746 if (!silent) 747 printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n"); 748 sb->s_flags |= MS_RDONLY; 749 } 750 break; 751 752 case UFS_MOUNT_UFSTYPE_OPENSTEP: 753 UFSD("ufstype=openstep\n"); 754 uspi->s_fsize = block_size = 1024; 755 uspi->s_fmask = ~(1024 - 1); 756 uspi->s_fshift = 10; 757 uspi->s_sbsize = super_block_size = 2048; 758 uspi->s_sbbase = 0; 759 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; 760 if (!(sb->s_flags & MS_RDONLY)) { 761 if (!silent) 762 printk(KERN_INFO "ufstype=openstep is supported read-only\n"); 763 sb->s_flags |= MS_RDONLY; 764 } 765 break; 766 767 case UFS_MOUNT_UFSTYPE_HP: 768 UFSD("ufstype=hp\n"); 769 uspi->s_fsize = block_size = 1024; 770 uspi->s_fmask = ~(1024 - 1); 771 uspi->s_fshift = 10; 772 uspi->s_sbsize = super_block_size = 2048; 773 uspi->s_sbbase = 0; 774 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 775 if (!(sb->s_flags & MS_RDONLY)) { 776 if (!silent) 777 printk(KERN_INFO "ufstype=hp is supported read-only\n"); 778 sb->s_flags |= MS_RDONLY; 779 } 780 break; 781 default: 782 if (!silent) 783 printk("unknown ufstype\n"); 784 goto failed; 785 } 786 787 again: 788 if (!sb_set_blocksize(sb, block_size)) { 789 printk(KERN_ERR "UFS: failed to set blocksize\n"); 790 goto failed; 791 } 792 793 /* 794 * read ufs super block from device 795 */ 796 797 ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size); 798 799 if (!ubh) 800 goto failed; 801 802 803 usb1 = ubh_get_usb_first(uspi); 804 usb2 = ubh_get_usb_second(uspi); 805 usb3 = ubh_get_usb_third(uspi); 806 807 /* 808 * Check ufs magic number 809 */ 810 sbi->s_bytesex = BYTESEX_LE; 811 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) { 812 case UFS_MAGIC: 813 case UFS2_MAGIC: 814 case UFS_MAGIC_LFN: 815 case UFS_MAGIC_FEA: 816 case UFS_MAGIC_4GB: 817 goto magic_found; 818 } 819 sbi->s_bytesex = BYTESEX_BE; 820 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) { 821 case UFS_MAGIC: 822 case UFS2_MAGIC: 823 case UFS_MAGIC_LFN: 824 case UFS_MAGIC_FEA: 825 case UFS_MAGIC_4GB: 826 goto magic_found; 827 } 828 829 if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP) 830 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD) 831 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP)) 832 && uspi->s_sbbase < 256) { 833 ubh_brelse_uspi(uspi); 834 ubh = NULL; 835 uspi->s_sbbase += 8; 836 goto again; 837 } 838 if (!silent) 839 printk("ufs_read_super: bad magic number\n"); 840 goto failed; 841 842 magic_found: 843 /* 844 * Check block and fragment sizes 845 */ 846 uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize); 847 uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize); 848 uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize); 849 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask); 850 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift); 851 852 if (uspi->s_fsize & (uspi->s_fsize - 1)) { 853 printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n", 854 uspi->s_fsize); 855 goto failed; 856 } 857 if (uspi->s_fsize < 512) { 858 printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n", 859 uspi->s_fsize); 860 goto failed; 861 } 862 if (uspi->s_fsize > 4096) { 863 printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n", 864 uspi->s_fsize); 865 goto failed; 866 } 867 if (uspi->s_bsize & (uspi->s_bsize - 1)) { 868 printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n", 869 uspi->s_bsize); 870 goto failed; 871 } 872 if (uspi->s_bsize < 4096) { 873 printk(KERN_ERR "ufs_read_super: block size %u is too small\n", 874 uspi->s_bsize); 875 goto failed; 876 } 877 if (uspi->s_bsize / uspi->s_fsize > 8) { 878 printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n", 879 uspi->s_bsize / uspi->s_fsize); 880 goto failed; 881 } 882 if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) { 883 ubh_brelse_uspi(uspi); 884 ubh = NULL; 885 block_size = uspi->s_fsize; 886 super_block_size = uspi->s_sbsize; 887 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size); 888 goto again; 889 } 890 891 892 ufs_print_super_stuff(sb, flags, usb1, usb2, usb3); 893 894 /* 895 * Check, if file system was correctly unmounted. 896 * If not, make it read only. 897 */ 898 if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) || 899 ((flags & UFS_ST_MASK) == UFS_ST_OLD) || 900 (((flags & UFS_ST_MASK) == UFS_ST_SUN || 901 (flags & UFS_ST_MASK) == UFS_ST_SUNx86) && 902 (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) { 903 switch(usb1->fs_clean) { 904 case UFS_FSCLEAN: 905 UFSD("fs is clean\n"); 906 break; 907 case UFS_FSSTABLE: 908 UFSD("fs is stable\n"); 909 break; 910 case UFS_FSOSF1: 911 UFSD("fs is DEC OSF/1\n"); 912 break; 913 case UFS_FSACTIVE: 914 printk("ufs_read_super: fs is active\n"); 915 sb->s_flags |= MS_RDONLY; 916 break; 917 case UFS_FSBAD: 918 printk("ufs_read_super: fs is bad\n"); 919 sb->s_flags |= MS_RDONLY; 920 break; 921 default: 922 printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean); 923 sb->s_flags |= MS_RDONLY; 924 break; 925 } 926 } else { 927 printk("ufs_read_super: fs needs fsck\n"); 928 sb->s_flags |= MS_RDONLY; 929 } 930 931 /* 932 * Read ufs_super_block into internal data structures 933 */ 934 sb->s_op = &ufs_super_ops; 935 sb->dq_op = NULL; /***/ 936 sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic); 937 938 uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno); 939 uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno); 940 uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno); 941 uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno); 942 uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset); 943 uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask); 944 945 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { 946 uspi->s_u2_size = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size); 947 uspi->s_u2_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize); 948 } else { 949 uspi->s_size = fs32_to_cpu(sb, usb1->fs_size); 950 uspi->s_dsize = fs32_to_cpu(sb, usb1->fs_dsize); 951 } 952 953 uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg); 954 /* s_bsize already set */ 955 /* s_fsize already set */ 956 uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag); 957 uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree); 958 uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask); 959 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask); 960 uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift); 961 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift); 962 UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift, 963 uspi->s_fshift); 964 uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift); 965 uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb); 966 /* s_sbsize already set */ 967 uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask); 968 uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift); 969 uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir); 970 uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb); 971 uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf); 972 uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3); 973 uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave); 974 uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew); 975 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr); 976 uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize); 977 uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize); 978 uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak); 979 uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect); 980 uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc); 981 uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg); 982 uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg); 983 uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc); 984 uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize); 985 uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3); 986 uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3); 987 uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat); 988 uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos); 989 uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff); 990 uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff); 991 992 /* 993 * Compute another frequently used values 994 */ 995 uspi->s_fpbmask = uspi->s_fpb - 1; 996 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) 997 uspi->s_apbshift = uspi->s_bshift - 3; 998 else 999 uspi->s_apbshift = uspi->s_bshift - 2; 1000 1001 uspi->s_2apbshift = uspi->s_apbshift * 2; 1002 uspi->s_3apbshift = uspi->s_apbshift * 3; 1003 uspi->s_apb = 1 << uspi->s_apbshift; 1004 uspi->s_2apb = 1 << uspi->s_2apbshift; 1005 uspi->s_3apb = 1 << uspi->s_3apbshift; 1006 uspi->s_apbmask = uspi->s_apb - 1; 1007 uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS; 1008 uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift; 1009 uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift; 1010 uspi->s_bpf = uspi->s_fsize << 3; 1011 uspi->s_bpfshift = uspi->s_fshift + 3; 1012 uspi->s_bpfmask = uspi->s_bpf - 1; 1013 if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == 1014 UFS_MOUNT_UFSTYPE_44BSD) 1015 uspi->s_maxsymlinklen = 1016 fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen); 1017 1018 sbi->s_flags = flags; 1019 1020 inode = iget(sb, UFS_ROOTINO); 1021 if (!inode || is_bad_inode(inode)) 1022 goto failed; 1023 sb->s_root = d_alloc_root(inode); 1024 if (!sb->s_root) 1025 goto dalloc_failed; 1026 1027 ufs_setup_cstotal(sb); 1028 /* 1029 * Read cylinder group structures 1030 */ 1031 if (!(sb->s_flags & MS_RDONLY)) 1032 if (!ufs_read_cylinder_structures(sb)) 1033 goto failed; 1034 1035 UFSD("EXIT\n"); 1036 return 0; 1037 1038 dalloc_failed: 1039 iput(inode); 1040 failed: 1041 if (ubh) 1042 ubh_brelse_uspi (uspi); 1043 kfree (uspi); 1044 kfree(sbi); 1045 sb->s_fs_info = NULL; 1046 UFSD("EXIT (FAILED)\n"); 1047 return -EINVAL; 1048 1049 failed_nomem: 1050 UFSD("EXIT (NOMEM)\n"); 1051 return -ENOMEM; 1052 } 1053 1054 static void ufs_write_super(struct super_block *sb) 1055 { 1056 struct ufs_sb_private_info * uspi; 1057 struct ufs_super_block_first * usb1; 1058 struct ufs_super_block_third * usb3; 1059 unsigned flags; 1060 1061 lock_kernel(); 1062 1063 UFSD("ENTER\n"); 1064 flags = UFS_SB(sb)->s_flags; 1065 uspi = UFS_SB(sb)->s_uspi; 1066 usb1 = ubh_get_usb_first(uspi); 1067 usb3 = ubh_get_usb_third(uspi); 1068 1069 if (!(sb->s_flags & MS_RDONLY)) { 1070 usb1->fs_time = cpu_to_fs32(sb, get_seconds()); 1071 if ((flags & UFS_ST_MASK) == UFS_ST_SUN 1072 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86) 1073 ufs_set_fs_state(sb, usb1, usb3, 1074 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time)); 1075 ufs_put_cstotal(sb); 1076 } 1077 sb->s_dirt = 0; 1078 UFSD("EXIT\n"); 1079 unlock_kernel(); 1080 } 1081 1082 static void ufs_put_super(struct super_block *sb) 1083 { 1084 struct ufs_sb_info * sbi = UFS_SB(sb); 1085 1086 UFSD("ENTER\n"); 1087 1088 if (!(sb->s_flags & MS_RDONLY)) 1089 ufs_put_super_internal(sb); 1090 1091 ubh_brelse_uspi (sbi->s_uspi); 1092 kfree (sbi->s_uspi); 1093 kfree (sbi); 1094 sb->s_fs_info = NULL; 1095 UFSD("EXIT\n"); 1096 return; 1097 } 1098 1099 1100 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data) 1101 { 1102 struct ufs_sb_private_info * uspi; 1103 struct ufs_super_block_first * usb1; 1104 struct ufs_super_block_third * usb3; 1105 unsigned new_mount_opt, ufstype; 1106 unsigned flags; 1107 1108 uspi = UFS_SB(sb)->s_uspi; 1109 flags = UFS_SB(sb)->s_flags; 1110 usb1 = ubh_get_usb_first(uspi); 1111 usb3 = ubh_get_usb_third(uspi); 1112 1113 /* 1114 * Allow the "check" option to be passed as a remount option. 1115 * It is not possible to change ufstype option during remount 1116 */ 1117 ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE; 1118 new_mount_opt = 0; 1119 ufs_set_opt (new_mount_opt, ONERROR_LOCK); 1120 if (!ufs_parse_options (data, &new_mount_opt)) 1121 return -EINVAL; 1122 if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) { 1123 new_mount_opt |= ufstype; 1124 } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) { 1125 printk("ufstype can't be changed during remount\n"); 1126 return -EINVAL; 1127 } 1128 1129 if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) { 1130 UFS_SB(sb)->s_mount_opt = new_mount_opt; 1131 return 0; 1132 } 1133 1134 /* 1135 * fs was mouted as rw, remounting ro 1136 */ 1137 if (*mount_flags & MS_RDONLY) { 1138 ufs_put_super_internal(sb); 1139 usb1->fs_time = cpu_to_fs32(sb, get_seconds()); 1140 if ((flags & UFS_ST_MASK) == UFS_ST_SUN 1141 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86) 1142 ufs_set_fs_state(sb, usb1, usb3, 1143 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time)); 1144 ubh_mark_buffer_dirty (USPI_UBH(uspi)); 1145 sb->s_dirt = 0; 1146 sb->s_flags |= MS_RDONLY; 1147 } else { 1148 /* 1149 * fs was mounted as ro, remounting rw 1150 */ 1151 #ifndef CONFIG_UFS_FS_WRITE 1152 printk("ufs was compiled with read-only support, " 1153 "can't be mounted as read-write\n"); 1154 return -EINVAL; 1155 #else 1156 if (ufstype != UFS_MOUNT_UFSTYPE_SUN && 1157 ufstype != UFS_MOUNT_UFSTYPE_44BSD && 1158 ufstype != UFS_MOUNT_UFSTYPE_SUNx86) { 1159 printk("this ufstype is read-only supported\n"); 1160 return -EINVAL; 1161 } 1162 if (!ufs_read_cylinder_structures(sb)) { 1163 printk("failed during remounting\n"); 1164 return -EPERM; 1165 } 1166 sb->s_flags &= ~MS_RDONLY; 1167 #endif 1168 } 1169 UFS_SB(sb)->s_mount_opt = new_mount_opt; 1170 return 0; 1171 } 1172 1173 static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf) 1174 { 1175 struct super_block *sb = dentry->d_sb; 1176 struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi; 1177 unsigned flags = UFS_SB(sb)->s_flags; 1178 struct ufs_super_block_first *usb1; 1179 struct ufs_super_block_second *usb2; 1180 struct ufs_super_block_third *usb3; 1181 1182 lock_kernel(); 1183 1184 usb1 = ubh_get_usb_first(uspi); 1185 usb2 = ubh_get_usb_second(uspi); 1186 usb3 = ubh_get_usb_third(uspi); 1187 1188 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { 1189 buf->f_type = UFS2_MAGIC; 1190 buf->f_blocks = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize); 1191 } else { 1192 buf->f_type = UFS_MAGIC; 1193 buf->f_blocks = uspi->s_dsize; 1194 } 1195 buf->f_bfree = ufs_blkstofrags(uspi->cs_total.cs_nbfree) + 1196 uspi->cs_total.cs_nffree; 1197 buf->f_ffree = uspi->cs_total.cs_nifree; 1198 buf->f_bsize = sb->s_blocksize; 1199 buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree)) 1200 ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0; 1201 buf->f_files = uspi->s_ncg * uspi->s_ipg; 1202 buf->f_namelen = UFS_MAXNAMLEN; 1203 1204 unlock_kernel(); 1205 1206 return 0; 1207 } 1208 1209 static kmem_cache_t * ufs_inode_cachep; 1210 1211 static struct inode *ufs_alloc_inode(struct super_block *sb) 1212 { 1213 struct ufs_inode_info *ei; 1214 ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, SLAB_KERNEL); 1215 if (!ei) 1216 return NULL; 1217 ei->vfs_inode.i_version = 1; 1218 return &ei->vfs_inode; 1219 } 1220 1221 static void ufs_destroy_inode(struct inode *inode) 1222 { 1223 kmem_cache_free(ufs_inode_cachep, UFS_I(inode)); 1224 } 1225 1226 static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags) 1227 { 1228 struct ufs_inode_info *ei = (struct ufs_inode_info *) foo; 1229 1230 if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) == 1231 SLAB_CTOR_CONSTRUCTOR) 1232 inode_init_once(&ei->vfs_inode); 1233 } 1234 1235 static int init_inodecache(void) 1236 { 1237 ufs_inode_cachep = kmem_cache_create("ufs_inode_cache", 1238 sizeof(struct ufs_inode_info), 1239 0, (SLAB_RECLAIM_ACCOUNT| 1240 SLAB_MEM_SPREAD), 1241 init_once, NULL); 1242 if (ufs_inode_cachep == NULL) 1243 return -ENOMEM; 1244 return 0; 1245 } 1246 1247 static void destroy_inodecache(void) 1248 { 1249 if (kmem_cache_destroy(ufs_inode_cachep)) 1250 printk(KERN_INFO "ufs_inode_cache: not all structures were freed\n"); 1251 } 1252 1253 #ifdef CONFIG_QUOTA 1254 static ssize_t ufs_quota_read(struct super_block *, int, char *,size_t, loff_t); 1255 static ssize_t ufs_quota_write(struct super_block *, int, const char *, size_t, loff_t); 1256 #endif 1257 1258 static struct super_operations ufs_super_ops = { 1259 .alloc_inode = ufs_alloc_inode, 1260 .destroy_inode = ufs_destroy_inode, 1261 .read_inode = ufs_read_inode, 1262 .write_inode = ufs_write_inode, 1263 .delete_inode = ufs_delete_inode, 1264 .put_super = ufs_put_super, 1265 .write_super = ufs_write_super, 1266 .statfs = ufs_statfs, 1267 .remount_fs = ufs_remount, 1268 #ifdef CONFIG_QUOTA 1269 .quota_read = ufs_quota_read, 1270 .quota_write = ufs_quota_write, 1271 #endif 1272 }; 1273 1274 #ifdef CONFIG_QUOTA 1275 1276 /* Read data from quotafile - avoid pagecache and such because we cannot afford 1277 * acquiring the locks... As quota files are never truncated and quota code 1278 * itself serializes the operations (and noone else should touch the files) 1279 * we don't have to be afraid of races */ 1280 static ssize_t ufs_quota_read(struct super_block *sb, int type, char *data, 1281 size_t len, loff_t off) 1282 { 1283 struct inode *inode = sb_dqopt(sb)->files[type]; 1284 sector_t blk = off >> sb->s_blocksize_bits; 1285 int err = 0; 1286 int offset = off & (sb->s_blocksize - 1); 1287 int tocopy; 1288 size_t toread; 1289 struct buffer_head *bh; 1290 loff_t i_size = i_size_read(inode); 1291 1292 if (off > i_size) 1293 return 0; 1294 if (off+len > i_size) 1295 len = i_size-off; 1296 toread = len; 1297 while (toread > 0) { 1298 tocopy = sb->s_blocksize - offset < toread ? 1299 sb->s_blocksize - offset : toread; 1300 1301 bh = ufs_bread(inode, blk, 0, &err); 1302 if (err) 1303 return err; 1304 if (!bh) /* A hole? */ 1305 memset(data, 0, tocopy); 1306 else { 1307 memcpy(data, bh->b_data+offset, tocopy); 1308 brelse(bh); 1309 } 1310 offset = 0; 1311 toread -= tocopy; 1312 data += tocopy; 1313 blk++; 1314 } 1315 return len; 1316 } 1317 1318 /* Write to quotafile */ 1319 static ssize_t ufs_quota_write(struct super_block *sb, int type, 1320 const char *data, size_t len, loff_t off) 1321 { 1322 struct inode *inode = sb_dqopt(sb)->files[type]; 1323 sector_t blk = off >> sb->s_blocksize_bits; 1324 int err = 0; 1325 int offset = off & (sb->s_blocksize - 1); 1326 int tocopy; 1327 size_t towrite = len; 1328 struct buffer_head *bh; 1329 1330 mutex_lock(&inode->i_mutex); 1331 while (towrite > 0) { 1332 tocopy = sb->s_blocksize - offset < towrite ? 1333 sb->s_blocksize - offset : towrite; 1334 1335 bh = ufs_bread(inode, blk, 1, &err); 1336 if (!bh) 1337 goto out; 1338 lock_buffer(bh); 1339 memcpy(bh->b_data+offset, data, tocopy); 1340 flush_dcache_page(bh->b_page); 1341 set_buffer_uptodate(bh); 1342 mark_buffer_dirty(bh); 1343 unlock_buffer(bh); 1344 brelse(bh); 1345 offset = 0; 1346 towrite -= tocopy; 1347 data += tocopy; 1348 blk++; 1349 } 1350 out: 1351 if (len == towrite) { 1352 mutex_unlock(&inode->i_mutex); 1353 return err; 1354 } 1355 if (inode->i_size < off+len-towrite) 1356 i_size_write(inode, off+len-towrite); 1357 inode->i_version++; 1358 inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC; 1359 mark_inode_dirty(inode); 1360 mutex_unlock(&inode->i_mutex); 1361 return len - towrite; 1362 } 1363 1364 #endif 1365 1366 static int ufs_get_sb(struct file_system_type *fs_type, 1367 int flags, const char *dev_name, void *data, struct vfsmount *mnt) 1368 { 1369 return get_sb_bdev(fs_type, flags, dev_name, data, ufs_fill_super, mnt); 1370 } 1371 1372 static struct file_system_type ufs_fs_type = { 1373 .owner = THIS_MODULE, 1374 .name = "ufs", 1375 .get_sb = ufs_get_sb, 1376 .kill_sb = kill_block_super, 1377 .fs_flags = FS_REQUIRES_DEV, 1378 }; 1379 1380 static int __init init_ufs_fs(void) 1381 { 1382 int err = init_inodecache(); 1383 if (err) 1384 goto out1; 1385 err = register_filesystem(&ufs_fs_type); 1386 if (err) 1387 goto out; 1388 return 0; 1389 out: 1390 destroy_inodecache(); 1391 out1: 1392 return err; 1393 } 1394 1395 static void __exit exit_ufs_fs(void) 1396 { 1397 unregister_filesystem(&ufs_fs_type); 1398 destroy_inodecache(); 1399 } 1400 1401 module_init(init_ufs_fs) 1402 module_exit(exit_ufs_fs) 1403 MODULE_LICENSE("GPL"); 1404