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 * UFS2 write support added by 65 * Evgeniy Dushistov <dushistov@mail.ru>, 2007 66 */ 67 68 69 #include <linux/module.h> 70 #include <linux/bitops.h> 71 72 #include <stdarg.h> 73 74 #include <asm/uaccess.h> 75 #include <asm/system.h> 76 77 #include <linux/errno.h> 78 #include <linux/fs.h> 79 #include <linux/ufs_fs.h> 80 #include <linux/slab.h> 81 #include <linux/time.h> 82 #include <linux/stat.h> 83 #include <linux/string.h> 84 #include <linux/blkdev.h> 85 #include <linux/init.h> 86 #include <linux/parser.h> 87 #include <linux/smp_lock.h> 88 #include <linux/buffer_head.h> 89 #include <linux/vfs.h> 90 #include <linux/log2.h> 91 92 #include "swab.h" 93 #include "util.h" 94 95 #ifdef CONFIG_UFS_DEBUG 96 /* 97 * Print contents of ufs_super_block, useful for debugging 98 */ 99 static void ufs_print_super_stuff(struct super_block *sb, 100 struct ufs_super_block_first *usb1, 101 struct ufs_super_block_second *usb2, 102 struct ufs_super_block_third *usb3) 103 { 104 u32 magic = fs32_to_cpu(sb, usb3->fs_magic); 105 106 printk("ufs_print_super_stuff\n"); 107 printk(" magic: 0x%x\n", magic); 108 if (fs32_to_cpu(sb, usb3->fs_magic) == UFS2_MAGIC) { 109 printk(" fs_size: %llu\n", (unsigned long long) 110 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size)); 111 printk(" fs_dsize: %llu\n", (unsigned long long) 112 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize)); 113 printk(" bsize: %u\n", 114 fs32_to_cpu(sb, usb1->fs_bsize)); 115 printk(" fsize: %u\n", 116 fs32_to_cpu(sb, usb1->fs_fsize)); 117 printk(" fs_volname: %s\n", usb2->fs_un.fs_u2.fs_volname); 118 printk(" fs_sblockloc: %llu\n", (unsigned long long) 119 fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc)); 120 printk(" cs_ndir(No of dirs): %llu\n", (unsigned long long) 121 fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir)); 122 printk(" cs_nbfree(No of free blocks): %llu\n", 123 (unsigned long long) 124 fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree)); 125 printk(KERN_INFO" cs_nifree(Num of free inodes): %llu\n", 126 (unsigned long long) 127 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree)); 128 printk(KERN_INFO" cs_nffree(Num of free frags): %llu\n", 129 (unsigned long long) 130 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree)); 131 } else { 132 printk(" sblkno: %u\n", fs32_to_cpu(sb, usb1->fs_sblkno)); 133 printk(" cblkno: %u\n", fs32_to_cpu(sb, usb1->fs_cblkno)); 134 printk(" iblkno: %u\n", fs32_to_cpu(sb, usb1->fs_iblkno)); 135 printk(" dblkno: %u\n", fs32_to_cpu(sb, usb1->fs_dblkno)); 136 printk(" cgoffset: %u\n", 137 fs32_to_cpu(sb, usb1->fs_cgoffset)); 138 printk(" ~cgmask: 0x%x\n", 139 ~fs32_to_cpu(sb, usb1->fs_cgmask)); 140 printk(" size: %u\n", fs32_to_cpu(sb, usb1->fs_size)); 141 printk(" dsize: %u\n", fs32_to_cpu(sb, usb1->fs_dsize)); 142 printk(" ncg: %u\n", fs32_to_cpu(sb, usb1->fs_ncg)); 143 printk(" bsize: %u\n", fs32_to_cpu(sb, usb1->fs_bsize)); 144 printk(" fsize: %u\n", fs32_to_cpu(sb, usb1->fs_fsize)); 145 printk(" frag: %u\n", fs32_to_cpu(sb, usb1->fs_frag)); 146 printk(" fragshift: %u\n", 147 fs32_to_cpu(sb, usb1->fs_fragshift)); 148 printk(" ~fmask: %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask)); 149 printk(" fshift: %u\n", fs32_to_cpu(sb, usb1->fs_fshift)); 150 printk(" sbsize: %u\n", fs32_to_cpu(sb, usb1->fs_sbsize)); 151 printk(" spc: %u\n", fs32_to_cpu(sb, usb1->fs_spc)); 152 printk(" cpg: %u\n", fs32_to_cpu(sb, usb1->fs_cpg)); 153 printk(" ipg: %u\n", fs32_to_cpu(sb, usb1->fs_ipg)); 154 printk(" fpg: %u\n", fs32_to_cpu(sb, usb1->fs_fpg)); 155 printk(" csaddr: %u\n", fs32_to_cpu(sb, usb1->fs_csaddr)); 156 printk(" cssize: %u\n", fs32_to_cpu(sb, usb1->fs_cssize)); 157 printk(" cgsize: %u\n", fs32_to_cpu(sb, usb1->fs_cgsize)); 158 printk(" fstodb: %u\n", 159 fs32_to_cpu(sb, usb1->fs_fsbtodb)); 160 printk(" nrpos: %u\n", fs32_to_cpu(sb, usb3->fs_nrpos)); 161 printk(" ndir %u\n", 162 fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir)); 163 printk(" nifree %u\n", 164 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree)); 165 printk(" nbfree %u\n", 166 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree)); 167 printk(" nffree %u\n", 168 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree)); 169 } 170 printk("\n"); 171 } 172 173 /* 174 * Print contents of ufs_cylinder_group, useful for debugging 175 */ 176 static void ufs_print_cylinder_stuff(struct super_block *sb, 177 struct ufs_cylinder_group *cg) 178 { 179 printk("\nufs_print_cylinder_stuff\n"); 180 printk("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group)); 181 printk(" magic: %x\n", fs32_to_cpu(sb, cg->cg_magic)); 182 printk(" time: %u\n", fs32_to_cpu(sb, cg->cg_time)); 183 printk(" cgx: %u\n", fs32_to_cpu(sb, cg->cg_cgx)); 184 printk(" ncyl: %u\n", fs16_to_cpu(sb, cg->cg_ncyl)); 185 printk(" niblk: %u\n", fs16_to_cpu(sb, cg->cg_niblk)); 186 printk(" ndblk: %u\n", fs32_to_cpu(sb, cg->cg_ndblk)); 187 printk(" cs_ndir: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir)); 188 printk(" cs_nbfree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree)); 189 printk(" cs_nifree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree)); 190 printk(" cs_nffree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree)); 191 printk(" rotor: %u\n", fs32_to_cpu(sb, cg->cg_rotor)); 192 printk(" frotor: %u\n", fs32_to_cpu(sb, cg->cg_frotor)); 193 printk(" irotor: %u\n", fs32_to_cpu(sb, cg->cg_irotor)); 194 printk(" frsum: %u, %u, %u, %u, %u, %u, %u, %u\n", 195 fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]), 196 fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]), 197 fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]), 198 fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7])); 199 printk(" btotoff: %u\n", fs32_to_cpu(sb, cg->cg_btotoff)); 200 printk(" boff: %u\n", fs32_to_cpu(sb, cg->cg_boff)); 201 printk(" iuseoff: %u\n", fs32_to_cpu(sb, cg->cg_iusedoff)); 202 printk(" freeoff: %u\n", fs32_to_cpu(sb, cg->cg_freeoff)); 203 printk(" nextfreeoff: %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff)); 204 printk(" clustersumoff %u\n", 205 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff)); 206 printk(" clusteroff %u\n", 207 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff)); 208 printk(" nclusterblks %u\n", 209 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks)); 210 printk("\n"); 211 } 212 #else 213 # define ufs_print_super_stuff(sb, usb1, usb2, usb3) /**/ 214 # define ufs_print_cylinder_stuff(sb, cg) /**/ 215 #endif /* CONFIG_UFS_DEBUG */ 216 217 static const struct super_operations ufs_super_ops; 218 219 static char error_buf[1024]; 220 221 void ufs_error (struct super_block * sb, const char * function, 222 const char * fmt, ...) 223 { 224 struct ufs_sb_private_info * uspi; 225 struct ufs_super_block_first * usb1; 226 va_list args; 227 228 uspi = UFS_SB(sb)->s_uspi; 229 usb1 = ubh_get_usb_first(uspi); 230 231 if (!(sb->s_flags & MS_RDONLY)) { 232 usb1->fs_clean = UFS_FSBAD; 233 ubh_mark_buffer_dirty(USPI_UBH(uspi)); 234 sb->s_dirt = 1; 235 sb->s_flags |= MS_RDONLY; 236 } 237 va_start (args, fmt); 238 vsnprintf (error_buf, sizeof(error_buf), fmt, args); 239 va_end (args); 240 switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) { 241 case UFS_MOUNT_ONERROR_PANIC: 242 panic ("UFS-fs panic (device %s): %s: %s\n", 243 sb->s_id, function, error_buf); 244 245 case UFS_MOUNT_ONERROR_LOCK: 246 case UFS_MOUNT_ONERROR_UMOUNT: 247 case UFS_MOUNT_ONERROR_REPAIR: 248 printk (KERN_CRIT "UFS-fs error (device %s): %s: %s\n", 249 sb->s_id, function, error_buf); 250 } 251 } 252 253 void ufs_panic (struct super_block * sb, const char * function, 254 const char * fmt, ...) 255 { 256 struct ufs_sb_private_info * uspi; 257 struct ufs_super_block_first * usb1; 258 va_list args; 259 260 uspi = UFS_SB(sb)->s_uspi; 261 usb1 = ubh_get_usb_first(uspi); 262 263 if (!(sb->s_flags & MS_RDONLY)) { 264 usb1->fs_clean = UFS_FSBAD; 265 ubh_mark_buffer_dirty(USPI_UBH(uspi)); 266 sb->s_dirt = 1; 267 } 268 va_start (args, fmt); 269 vsnprintf (error_buf, sizeof(error_buf), fmt, args); 270 va_end (args); 271 sb->s_flags |= MS_RDONLY; 272 printk (KERN_CRIT "UFS-fs panic (device %s): %s: %s\n", 273 sb->s_id, function, error_buf); 274 } 275 276 void ufs_warning (struct super_block * sb, const char * function, 277 const char * fmt, ...) 278 { 279 va_list args; 280 281 va_start (args, fmt); 282 vsnprintf (error_buf, sizeof(error_buf), fmt, args); 283 va_end (args); 284 printk (KERN_WARNING "UFS-fs warning (device %s): %s: %s\n", 285 sb->s_id, function, error_buf); 286 } 287 288 enum { 289 Opt_type_old, Opt_type_sunx86, Opt_type_sun, Opt_type_44bsd, 290 Opt_type_ufs2, Opt_type_hp, Opt_type_nextstepcd, Opt_type_nextstep, 291 Opt_type_openstep, Opt_onerror_panic, Opt_onerror_lock, 292 Opt_onerror_umount, Opt_onerror_repair, Opt_err 293 }; 294 295 static match_table_t tokens = { 296 {Opt_type_old, "ufstype=old"}, 297 {Opt_type_sunx86, "ufstype=sunx86"}, 298 {Opt_type_sun, "ufstype=sun"}, 299 {Opt_type_44bsd, "ufstype=44bsd"}, 300 {Opt_type_ufs2, "ufstype=ufs2"}, 301 {Opt_type_ufs2, "ufstype=5xbsd"}, 302 {Opt_type_hp, "ufstype=hp"}, 303 {Opt_type_nextstepcd, "ufstype=nextstep-cd"}, 304 {Opt_type_nextstep, "ufstype=nextstep"}, 305 {Opt_type_openstep, "ufstype=openstep"}, 306 {Opt_onerror_panic, "onerror=panic"}, 307 {Opt_onerror_lock, "onerror=lock"}, 308 {Opt_onerror_umount, "onerror=umount"}, 309 {Opt_onerror_repair, "onerror=repair"}, 310 {Opt_err, NULL} 311 }; 312 313 static int ufs_parse_options (char * options, unsigned * mount_options) 314 { 315 char * p; 316 317 UFSD("ENTER\n"); 318 319 if (!options) 320 return 1; 321 322 while ((p = strsep(&options, ",")) != NULL) { 323 substring_t args[MAX_OPT_ARGS]; 324 int token; 325 if (!*p) 326 continue; 327 328 token = match_token(p, tokens, args); 329 switch (token) { 330 case Opt_type_old: 331 ufs_clear_opt (*mount_options, UFSTYPE); 332 ufs_set_opt (*mount_options, UFSTYPE_OLD); 333 break; 334 case Opt_type_sunx86: 335 ufs_clear_opt (*mount_options, UFSTYPE); 336 ufs_set_opt (*mount_options, UFSTYPE_SUNx86); 337 break; 338 case Opt_type_sun: 339 ufs_clear_opt (*mount_options, UFSTYPE); 340 ufs_set_opt (*mount_options, UFSTYPE_SUN); 341 break; 342 case Opt_type_44bsd: 343 ufs_clear_opt (*mount_options, UFSTYPE); 344 ufs_set_opt (*mount_options, UFSTYPE_44BSD); 345 break; 346 case Opt_type_ufs2: 347 ufs_clear_opt(*mount_options, UFSTYPE); 348 ufs_set_opt(*mount_options, UFSTYPE_UFS2); 349 break; 350 case Opt_type_hp: 351 ufs_clear_opt (*mount_options, UFSTYPE); 352 ufs_set_opt (*mount_options, UFSTYPE_HP); 353 break; 354 case Opt_type_nextstepcd: 355 ufs_clear_opt (*mount_options, UFSTYPE); 356 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD); 357 break; 358 case Opt_type_nextstep: 359 ufs_clear_opt (*mount_options, UFSTYPE); 360 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP); 361 break; 362 case Opt_type_openstep: 363 ufs_clear_opt (*mount_options, UFSTYPE); 364 ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP); 365 break; 366 case Opt_onerror_panic: 367 ufs_clear_opt (*mount_options, ONERROR); 368 ufs_set_opt (*mount_options, ONERROR_PANIC); 369 break; 370 case Opt_onerror_lock: 371 ufs_clear_opt (*mount_options, ONERROR); 372 ufs_set_opt (*mount_options, ONERROR_LOCK); 373 break; 374 case Opt_onerror_umount: 375 ufs_clear_opt (*mount_options, ONERROR); 376 ufs_set_opt (*mount_options, ONERROR_UMOUNT); 377 break; 378 case Opt_onerror_repair: 379 printk("UFS-fs: Unable to do repair on error, " 380 "will lock lock instead\n"); 381 ufs_clear_opt (*mount_options, ONERROR); 382 ufs_set_opt (*mount_options, ONERROR_REPAIR); 383 break; 384 default: 385 printk("UFS-fs: Invalid option: \"%s\" " 386 "or missing value\n", p); 387 return 0; 388 } 389 } 390 return 1; 391 } 392 393 /* 394 * Diffrent types of UFS hold fs_cstotal in different 395 * places, and use diffrent data structure for it. 396 * To make things simplier we just copy fs_cstotal to ufs_sb_private_info 397 */ 398 static void ufs_setup_cstotal(struct super_block *sb) 399 { 400 struct ufs_sb_info *sbi = UFS_SB(sb); 401 struct ufs_sb_private_info *uspi = sbi->s_uspi; 402 struct ufs_super_block_first *usb1; 403 struct ufs_super_block_second *usb2; 404 struct ufs_super_block_third *usb3; 405 unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE; 406 407 UFSD("ENTER, mtype=%u\n", mtype); 408 usb1 = ubh_get_usb_first(uspi); 409 usb2 = ubh_get_usb_second(uspi); 410 usb3 = ubh_get_usb_third(uspi); 411 412 if ((mtype == UFS_MOUNT_UFSTYPE_44BSD && 413 (usb1->fs_flags & UFS_FLAGS_UPDATED)) || 414 mtype == UFS_MOUNT_UFSTYPE_UFS2) { 415 /*we have statistic in different place, then usual*/ 416 uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir); 417 uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree); 418 uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree); 419 uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree); 420 } else { 421 uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir); 422 uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree); 423 uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree); 424 uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree); 425 } 426 UFSD("EXIT\n"); 427 } 428 429 /* 430 * Read on-disk structures associated with cylinder groups 431 */ 432 static int ufs_read_cylinder_structures(struct super_block *sb) 433 { 434 struct ufs_sb_info *sbi = UFS_SB(sb); 435 struct ufs_sb_private_info *uspi = sbi->s_uspi; 436 struct ufs_buffer_head * ubh; 437 unsigned char * base, * space; 438 unsigned size, blks, i; 439 struct ufs_super_block_third *usb3; 440 441 UFSD("ENTER\n"); 442 443 usb3 = ubh_get_usb_third(uspi); 444 /* 445 * Read cs structures from (usually) first data block 446 * on the device. 447 */ 448 size = uspi->s_cssize; 449 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift; 450 base = space = kmalloc(size, GFP_KERNEL); 451 if (!base) 452 goto failed; 453 sbi->s_csp = (struct ufs_csum *)space; 454 for (i = 0; i < blks; i += uspi->s_fpb) { 455 size = uspi->s_bsize; 456 if (i + uspi->s_fpb > blks) 457 size = (blks - i) * uspi->s_fsize; 458 459 ubh = ubh_bread(sb, uspi->s_csaddr + i, size); 460 461 if (!ubh) 462 goto failed; 463 464 ubh_ubhcpymem (space, ubh, size); 465 466 space += size; 467 ubh_brelse (ubh); 468 ubh = NULL; 469 } 470 471 /* 472 * Read cylinder group (we read only first fragment from block 473 * at this time) and prepare internal data structures for cg caching. 474 */ 475 if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_KERNEL))) 476 goto failed; 477 for (i = 0; i < uspi->s_ncg; i++) 478 sbi->s_ucg[i] = NULL; 479 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) { 480 sbi->s_ucpi[i] = NULL; 481 sbi->s_cgno[i] = UFS_CGNO_EMPTY; 482 } 483 for (i = 0; i < uspi->s_ncg; i++) { 484 UFSD("read cg %u\n", i); 485 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i)))) 486 goto failed; 487 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data)) 488 goto failed; 489 490 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data); 491 } 492 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) { 493 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_KERNEL))) 494 goto failed; 495 sbi->s_cgno[i] = UFS_CGNO_EMPTY; 496 } 497 sbi->s_cg_loaded = 0; 498 UFSD("EXIT\n"); 499 return 1; 500 501 failed: 502 kfree (base); 503 if (sbi->s_ucg) { 504 for (i = 0; i < uspi->s_ncg; i++) 505 if (sbi->s_ucg[i]) 506 brelse (sbi->s_ucg[i]); 507 kfree (sbi->s_ucg); 508 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) 509 kfree (sbi->s_ucpi[i]); 510 } 511 UFSD("EXIT (FAILED)\n"); 512 return 0; 513 } 514 515 /* 516 * Sync our internal copy of fs_cstotal with disk 517 */ 518 static void ufs_put_cstotal(struct super_block *sb) 519 { 520 unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE; 521 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 522 struct ufs_super_block_first *usb1; 523 struct ufs_super_block_second *usb2; 524 struct ufs_super_block_third *usb3; 525 526 UFSD("ENTER\n"); 527 usb1 = ubh_get_usb_first(uspi); 528 usb2 = ubh_get_usb_second(uspi); 529 usb3 = ubh_get_usb_third(uspi); 530 531 if ((mtype == UFS_MOUNT_UFSTYPE_44BSD && 532 (usb1->fs_flags & UFS_FLAGS_UPDATED)) || 533 mtype == UFS_MOUNT_UFSTYPE_UFS2) { 534 /*we have statistic in different place, then usual*/ 535 usb2->fs_un.fs_u2.cs_ndir = 536 cpu_to_fs64(sb, uspi->cs_total.cs_ndir); 537 usb2->fs_un.fs_u2.cs_nbfree = 538 cpu_to_fs64(sb, uspi->cs_total.cs_nbfree); 539 usb3->fs_un1.fs_u2.cs_nifree = 540 cpu_to_fs64(sb, uspi->cs_total.cs_nifree); 541 usb3->fs_un1.fs_u2.cs_nffree = 542 cpu_to_fs64(sb, uspi->cs_total.cs_nffree); 543 } else { 544 usb1->fs_cstotal.cs_ndir = 545 cpu_to_fs32(sb, uspi->cs_total.cs_ndir); 546 usb1->fs_cstotal.cs_nbfree = 547 cpu_to_fs32(sb, uspi->cs_total.cs_nbfree); 548 usb1->fs_cstotal.cs_nifree = 549 cpu_to_fs32(sb, uspi->cs_total.cs_nifree); 550 usb1->fs_cstotal.cs_nffree = 551 cpu_to_fs32(sb, uspi->cs_total.cs_nffree); 552 } 553 ubh_mark_buffer_dirty(USPI_UBH(uspi)); 554 ufs_print_super_stuff(sb, usb1, usb2, usb3); 555 UFSD("EXIT\n"); 556 } 557 558 /** 559 * ufs_put_super_internal() - put on-disk intrenal structures 560 * @sb: pointer to super_block structure 561 * Put on-disk structures associated with cylinder groups 562 * and write them back to disk, also update cs_total on disk 563 */ 564 static void ufs_put_super_internal(struct super_block *sb) 565 { 566 struct ufs_sb_info *sbi = UFS_SB(sb); 567 struct ufs_sb_private_info *uspi = sbi->s_uspi; 568 struct ufs_buffer_head * ubh; 569 unsigned char * base, * space; 570 unsigned blks, size, i; 571 572 573 UFSD("ENTER\n"); 574 ufs_put_cstotal(sb); 575 size = uspi->s_cssize; 576 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift; 577 base = space = (char*) sbi->s_csp; 578 for (i = 0; i < blks; i += uspi->s_fpb) { 579 size = uspi->s_bsize; 580 if (i + uspi->s_fpb > blks) 581 size = (blks - i) * uspi->s_fsize; 582 583 ubh = ubh_bread(sb, uspi->s_csaddr + i, size); 584 585 ubh_memcpyubh (ubh, space, size); 586 space += size; 587 ubh_mark_buffer_uptodate (ubh, 1); 588 ubh_mark_buffer_dirty (ubh); 589 ubh_brelse (ubh); 590 } 591 for (i = 0; i < sbi->s_cg_loaded; i++) { 592 ufs_put_cylinder (sb, i); 593 kfree (sbi->s_ucpi[i]); 594 } 595 for (; i < UFS_MAX_GROUP_LOADED; i++) 596 kfree (sbi->s_ucpi[i]); 597 for (i = 0; i < uspi->s_ncg; i++) 598 brelse (sbi->s_ucg[i]); 599 kfree (sbi->s_ucg); 600 kfree (base); 601 UFSD("EXIT\n"); 602 } 603 604 static int ufs_fill_super(struct super_block *sb, void *data, int silent) 605 { 606 struct ufs_sb_info * sbi; 607 struct ufs_sb_private_info * uspi; 608 struct ufs_super_block_first * usb1; 609 struct ufs_super_block_second * usb2; 610 struct ufs_super_block_third * usb3; 611 struct ufs_buffer_head * ubh; 612 struct inode *inode; 613 unsigned block_size, super_block_size; 614 unsigned flags; 615 unsigned super_block_offset; 616 617 uspi = NULL; 618 ubh = NULL; 619 flags = 0; 620 621 UFSD("ENTER\n"); 622 623 sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL); 624 if (!sbi) 625 goto failed_nomem; 626 sb->s_fs_info = sbi; 627 628 UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY)); 629 630 #ifndef CONFIG_UFS_FS_WRITE 631 if (!(sb->s_flags & MS_RDONLY)) { 632 printk("ufs was compiled with read-only support, " 633 "can't be mounted as read-write\n"); 634 goto failed; 635 } 636 #endif 637 /* 638 * Set default mount options 639 * Parse mount options 640 */ 641 sbi->s_mount_opt = 0; 642 ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK); 643 if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) { 644 printk("wrong mount options\n"); 645 goto failed; 646 } 647 if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) { 648 if (!silent) 649 printk("You didn't specify the type of your ufs filesystem\n\n" 650 "mount -t ufs -o ufstype=" 651 "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n" 652 ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, " 653 "default is ufstype=old\n"); 654 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD); 655 } 656 657 sbi->s_uspi = uspi = 658 kmalloc (sizeof(struct ufs_sb_private_info), GFP_KERNEL); 659 if (!uspi) 660 goto failed; 661 uspi->s_dirblksize = UFS_SECTOR_SIZE; 662 super_block_offset=UFS_SBLOCK; 663 664 /* Keep 2Gig file limit. Some UFS variants need to override 665 this but as I don't know which I'll let those in the know loosen 666 the rules */ 667 switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) { 668 case UFS_MOUNT_UFSTYPE_44BSD: 669 UFSD("ufstype=44bsd\n"); 670 uspi->s_fsize = block_size = 512; 671 uspi->s_fmask = ~(512 - 1); 672 uspi->s_fshift = 9; 673 uspi->s_sbsize = super_block_size = 1536; 674 uspi->s_sbbase = 0; 675 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; 676 break; 677 case UFS_MOUNT_UFSTYPE_UFS2: 678 UFSD("ufstype=ufs2\n"); 679 super_block_offset=SBLOCK_UFS2; 680 uspi->s_fsize = block_size = 512; 681 uspi->s_fmask = ~(512 - 1); 682 uspi->s_fshift = 9; 683 uspi->s_sbsize = super_block_size = 1536; 684 uspi->s_sbbase = 0; 685 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; 686 break; 687 688 case UFS_MOUNT_UFSTYPE_SUN: 689 UFSD("ufstype=sun\n"); 690 uspi->s_fsize = block_size = 1024; 691 uspi->s_fmask = ~(1024 - 1); 692 uspi->s_fshift = 10; 693 uspi->s_sbsize = super_block_size = 2048; 694 uspi->s_sbbase = 0; 695 uspi->s_maxsymlinklen = 56; 696 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN; 697 break; 698 699 case UFS_MOUNT_UFSTYPE_SUNx86: 700 UFSD("ufstype=sunx86\n"); 701 uspi->s_fsize = block_size = 1024; 702 uspi->s_fmask = ~(1024 - 1); 703 uspi->s_fshift = 10; 704 uspi->s_sbsize = super_block_size = 2048; 705 uspi->s_sbbase = 0; 706 uspi->s_maxsymlinklen = 56; 707 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN; 708 break; 709 710 case UFS_MOUNT_UFSTYPE_OLD: 711 UFSD("ufstype=old\n"); 712 uspi->s_fsize = block_size = 1024; 713 uspi->s_fmask = ~(1024 - 1); 714 uspi->s_fshift = 10; 715 uspi->s_sbsize = super_block_size = 2048; 716 uspi->s_sbbase = 0; 717 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 718 if (!(sb->s_flags & MS_RDONLY)) { 719 if (!silent) 720 printk(KERN_INFO "ufstype=old is supported read-only\n"); 721 sb->s_flags |= MS_RDONLY; 722 } 723 break; 724 725 case UFS_MOUNT_UFSTYPE_NEXTSTEP: 726 /*TODO: check may be we need set special dir block size?*/ 727 UFSD("ufstype=nextstep\n"); 728 uspi->s_fsize = block_size = 1024; 729 uspi->s_fmask = ~(1024 - 1); 730 uspi->s_fshift = 10; 731 uspi->s_sbsize = super_block_size = 2048; 732 uspi->s_sbbase = 0; 733 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 734 if (!(sb->s_flags & MS_RDONLY)) { 735 if (!silent) 736 printk(KERN_INFO "ufstype=nextstep is supported read-only\n"); 737 sb->s_flags |= MS_RDONLY; 738 } 739 break; 740 741 case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD: 742 /*TODO: check may be we need set special dir block size?*/ 743 UFSD("ufstype=nextstep-cd\n"); 744 uspi->s_fsize = block_size = 2048; 745 uspi->s_fmask = ~(2048 - 1); 746 uspi->s_fshift = 11; 747 uspi->s_sbsize = super_block_size = 2048; 748 uspi->s_sbbase = 0; 749 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 750 if (!(sb->s_flags & MS_RDONLY)) { 751 if (!silent) 752 printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n"); 753 sb->s_flags |= MS_RDONLY; 754 } 755 break; 756 757 case UFS_MOUNT_UFSTYPE_OPENSTEP: 758 UFSD("ufstype=openstep\n"); 759 uspi->s_fsize = block_size = 1024; 760 uspi->s_fmask = ~(1024 - 1); 761 uspi->s_fshift = 10; 762 uspi->s_sbsize = super_block_size = 2048; 763 uspi->s_sbbase = 0; 764 uspi->s_dirblksize = 1024; 765 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; 766 if (!(sb->s_flags & MS_RDONLY)) { 767 if (!silent) 768 printk(KERN_INFO "ufstype=openstep is supported read-only\n"); 769 sb->s_flags |= MS_RDONLY; 770 } 771 break; 772 773 case UFS_MOUNT_UFSTYPE_HP: 774 UFSD("ufstype=hp\n"); 775 uspi->s_fsize = block_size = 1024; 776 uspi->s_fmask = ~(1024 - 1); 777 uspi->s_fshift = 10; 778 uspi->s_sbsize = super_block_size = 2048; 779 uspi->s_sbbase = 0; 780 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 781 if (!(sb->s_flags & MS_RDONLY)) { 782 if (!silent) 783 printk(KERN_INFO "ufstype=hp is supported read-only\n"); 784 sb->s_flags |= MS_RDONLY; 785 } 786 break; 787 default: 788 if (!silent) 789 printk("unknown ufstype\n"); 790 goto failed; 791 } 792 793 again: 794 if (!sb_set_blocksize(sb, block_size)) { 795 printk(KERN_ERR "UFS: failed to set blocksize\n"); 796 goto failed; 797 } 798 799 /* 800 * read ufs super block from device 801 */ 802 803 ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size); 804 805 if (!ubh) 806 goto failed; 807 808 809 usb1 = ubh_get_usb_first(uspi); 810 usb2 = ubh_get_usb_second(uspi); 811 usb3 = ubh_get_usb_third(uspi); 812 813 /* 814 * Check ufs magic number 815 */ 816 sbi->s_bytesex = BYTESEX_LE; 817 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) { 818 case UFS_MAGIC: 819 case UFS2_MAGIC: 820 case UFS_MAGIC_LFN: 821 case UFS_MAGIC_FEA: 822 case UFS_MAGIC_4GB: 823 goto magic_found; 824 } 825 sbi->s_bytesex = BYTESEX_BE; 826 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) { 827 case UFS_MAGIC: 828 case UFS2_MAGIC: 829 case UFS_MAGIC_LFN: 830 case UFS_MAGIC_FEA: 831 case UFS_MAGIC_4GB: 832 goto magic_found; 833 } 834 835 if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP) 836 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD) 837 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP)) 838 && uspi->s_sbbase < 256) { 839 ubh_brelse_uspi(uspi); 840 ubh = NULL; 841 uspi->s_sbbase += 8; 842 goto again; 843 } 844 if (!silent) 845 printk("ufs_read_super: bad magic number\n"); 846 goto failed; 847 848 magic_found: 849 /* 850 * Check block and fragment sizes 851 */ 852 uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize); 853 uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize); 854 uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize); 855 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask); 856 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift); 857 858 if (!is_power_of_2(uspi->s_fsize)) { 859 printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n", 860 uspi->s_fsize); 861 goto failed; 862 } 863 if (uspi->s_fsize < 512) { 864 printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n", 865 uspi->s_fsize); 866 goto failed; 867 } 868 if (uspi->s_fsize > 4096) { 869 printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n", 870 uspi->s_fsize); 871 goto failed; 872 } 873 if (!is_power_of_2(uspi->s_bsize)) { 874 printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n", 875 uspi->s_bsize); 876 goto failed; 877 } 878 if (uspi->s_bsize < 4096) { 879 printk(KERN_ERR "ufs_read_super: block size %u is too small\n", 880 uspi->s_bsize); 881 goto failed; 882 } 883 if (uspi->s_bsize / uspi->s_fsize > 8) { 884 printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n", 885 uspi->s_bsize / uspi->s_fsize); 886 goto failed; 887 } 888 if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) { 889 ubh_brelse_uspi(uspi); 890 ubh = NULL; 891 block_size = uspi->s_fsize; 892 super_block_size = uspi->s_sbsize; 893 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size); 894 goto again; 895 } 896 897 sbi->s_flags = flags;/*after that line some functions use s_flags*/ 898 ufs_print_super_stuff(sb, usb1, usb2, usb3); 899 900 /* 901 * Check, if file system was correctly unmounted. 902 * If not, make it read only. 903 */ 904 if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) || 905 ((flags & UFS_ST_MASK) == UFS_ST_OLD) || 906 (((flags & UFS_ST_MASK) == UFS_ST_SUN || 907 (flags & UFS_ST_MASK) == UFS_ST_SUNx86) && 908 (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) { 909 switch(usb1->fs_clean) { 910 case UFS_FSCLEAN: 911 UFSD("fs is clean\n"); 912 break; 913 case UFS_FSSTABLE: 914 UFSD("fs is stable\n"); 915 break; 916 case UFS_FSOSF1: 917 UFSD("fs is DEC OSF/1\n"); 918 break; 919 case UFS_FSACTIVE: 920 printk("ufs_read_super: fs is active\n"); 921 sb->s_flags |= MS_RDONLY; 922 break; 923 case UFS_FSBAD: 924 printk("ufs_read_super: fs is bad\n"); 925 sb->s_flags |= MS_RDONLY; 926 break; 927 default: 928 printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean); 929 sb->s_flags |= MS_RDONLY; 930 break; 931 } 932 } else { 933 printk("ufs_read_super: fs needs fsck\n"); 934 sb->s_flags |= MS_RDONLY; 935 } 936 937 /* 938 * Read ufs_super_block into internal data structures 939 */ 940 sb->s_op = &ufs_super_ops; 941 sb->dq_op = NULL; /***/ 942 sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic); 943 944 uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno); 945 uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno); 946 uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno); 947 uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno); 948 uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset); 949 uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask); 950 951 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { 952 uspi->s_u2_size = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size); 953 uspi->s_u2_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize); 954 } else { 955 uspi->s_size = fs32_to_cpu(sb, usb1->fs_size); 956 uspi->s_dsize = fs32_to_cpu(sb, usb1->fs_dsize); 957 } 958 959 uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg); 960 /* s_bsize already set */ 961 /* s_fsize already set */ 962 uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag); 963 uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree); 964 uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask); 965 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask); 966 uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift); 967 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift); 968 UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift, 969 uspi->s_fshift); 970 uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift); 971 uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb); 972 /* s_sbsize already set */ 973 uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask); 974 uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift); 975 uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir); 976 uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb); 977 uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf); 978 uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3); 979 uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave); 980 uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew); 981 982 if (uspi->fs_magic == UFS2_MAGIC) 983 uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr); 984 else 985 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr); 986 987 uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize); 988 uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize); 989 uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak); 990 uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect); 991 uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc); 992 uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg); 993 uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg); 994 uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc); 995 uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize); 996 uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3); 997 uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3); 998 uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat); 999 uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos); 1000 uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff); 1001 uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff); 1002 1003 /* 1004 * Compute another frequently used values 1005 */ 1006 uspi->s_fpbmask = uspi->s_fpb - 1; 1007 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) 1008 uspi->s_apbshift = uspi->s_bshift - 3; 1009 else 1010 uspi->s_apbshift = uspi->s_bshift - 2; 1011 1012 uspi->s_2apbshift = uspi->s_apbshift * 2; 1013 uspi->s_3apbshift = uspi->s_apbshift * 3; 1014 uspi->s_apb = 1 << uspi->s_apbshift; 1015 uspi->s_2apb = 1 << uspi->s_2apbshift; 1016 uspi->s_3apb = 1 << uspi->s_3apbshift; 1017 uspi->s_apbmask = uspi->s_apb - 1; 1018 uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS; 1019 uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift; 1020 uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift; 1021 uspi->s_bpf = uspi->s_fsize << 3; 1022 uspi->s_bpfshift = uspi->s_fshift + 3; 1023 uspi->s_bpfmask = uspi->s_bpf - 1; 1024 if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == 1025 UFS_MOUNT_UFSTYPE_44BSD) 1026 uspi->s_maxsymlinklen = 1027 fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen); 1028 1029 inode = iget(sb, UFS_ROOTINO); 1030 if (!inode || is_bad_inode(inode)) 1031 goto failed; 1032 sb->s_root = d_alloc_root(inode); 1033 if (!sb->s_root) 1034 goto dalloc_failed; 1035 1036 ufs_setup_cstotal(sb); 1037 /* 1038 * Read cylinder group structures 1039 */ 1040 if (!(sb->s_flags & MS_RDONLY)) 1041 if (!ufs_read_cylinder_structures(sb)) 1042 goto failed; 1043 1044 UFSD("EXIT\n"); 1045 return 0; 1046 1047 dalloc_failed: 1048 iput(inode); 1049 failed: 1050 if (ubh) 1051 ubh_brelse_uspi (uspi); 1052 kfree (uspi); 1053 kfree(sbi); 1054 sb->s_fs_info = NULL; 1055 UFSD("EXIT (FAILED)\n"); 1056 return -EINVAL; 1057 1058 failed_nomem: 1059 UFSD("EXIT (NOMEM)\n"); 1060 return -ENOMEM; 1061 } 1062 1063 static void ufs_write_super(struct super_block *sb) 1064 { 1065 struct ufs_sb_private_info * uspi; 1066 struct ufs_super_block_first * usb1; 1067 struct ufs_super_block_third * usb3; 1068 unsigned flags; 1069 1070 lock_kernel(); 1071 UFSD("ENTER\n"); 1072 flags = UFS_SB(sb)->s_flags; 1073 uspi = UFS_SB(sb)->s_uspi; 1074 usb1 = ubh_get_usb_first(uspi); 1075 usb3 = ubh_get_usb_third(uspi); 1076 1077 if (!(sb->s_flags & MS_RDONLY)) { 1078 usb1->fs_time = cpu_to_fs32(sb, get_seconds()); 1079 if ((flags & UFS_ST_MASK) == UFS_ST_SUN 1080 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86) 1081 ufs_set_fs_state(sb, usb1, usb3, 1082 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time)); 1083 ufs_put_cstotal(sb); 1084 } 1085 sb->s_dirt = 0; 1086 UFSD("EXIT\n"); 1087 unlock_kernel(); 1088 } 1089 1090 static void ufs_put_super(struct super_block *sb) 1091 { 1092 struct ufs_sb_info * sbi = UFS_SB(sb); 1093 1094 UFSD("ENTER\n"); 1095 1096 if (!(sb->s_flags & MS_RDONLY)) 1097 ufs_put_super_internal(sb); 1098 1099 ubh_brelse_uspi (sbi->s_uspi); 1100 kfree (sbi->s_uspi); 1101 kfree (sbi); 1102 sb->s_fs_info = NULL; 1103 UFSD("EXIT\n"); 1104 return; 1105 } 1106 1107 1108 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data) 1109 { 1110 struct ufs_sb_private_info * uspi; 1111 struct ufs_super_block_first * usb1; 1112 struct ufs_super_block_third * usb3; 1113 unsigned new_mount_opt, ufstype; 1114 unsigned flags; 1115 1116 uspi = UFS_SB(sb)->s_uspi; 1117 flags = UFS_SB(sb)->s_flags; 1118 usb1 = ubh_get_usb_first(uspi); 1119 usb3 = ubh_get_usb_third(uspi); 1120 1121 /* 1122 * Allow the "check" option to be passed as a remount option. 1123 * It is not possible to change ufstype option during remount 1124 */ 1125 ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE; 1126 new_mount_opt = 0; 1127 ufs_set_opt (new_mount_opt, ONERROR_LOCK); 1128 if (!ufs_parse_options (data, &new_mount_opt)) 1129 return -EINVAL; 1130 if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) { 1131 new_mount_opt |= ufstype; 1132 } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) { 1133 printk("ufstype can't be changed during remount\n"); 1134 return -EINVAL; 1135 } 1136 1137 if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) { 1138 UFS_SB(sb)->s_mount_opt = new_mount_opt; 1139 return 0; 1140 } 1141 1142 /* 1143 * fs was mouted as rw, remounting ro 1144 */ 1145 if (*mount_flags & MS_RDONLY) { 1146 ufs_put_super_internal(sb); 1147 usb1->fs_time = cpu_to_fs32(sb, get_seconds()); 1148 if ((flags & UFS_ST_MASK) == UFS_ST_SUN 1149 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86) 1150 ufs_set_fs_state(sb, usb1, usb3, 1151 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time)); 1152 ubh_mark_buffer_dirty (USPI_UBH(uspi)); 1153 sb->s_dirt = 0; 1154 sb->s_flags |= MS_RDONLY; 1155 } else { 1156 /* 1157 * fs was mounted as ro, remounting rw 1158 */ 1159 #ifndef CONFIG_UFS_FS_WRITE 1160 printk("ufs was compiled with read-only support, " 1161 "can't be mounted as read-write\n"); 1162 return -EINVAL; 1163 #else 1164 if (ufstype != UFS_MOUNT_UFSTYPE_SUN && 1165 ufstype != UFS_MOUNT_UFSTYPE_44BSD && 1166 ufstype != UFS_MOUNT_UFSTYPE_SUNx86 && 1167 ufstype != UFS_MOUNT_UFSTYPE_UFS2) { 1168 printk("this ufstype is read-only supported\n"); 1169 return -EINVAL; 1170 } 1171 if (!ufs_read_cylinder_structures(sb)) { 1172 printk("failed during remounting\n"); 1173 return -EPERM; 1174 } 1175 sb->s_flags &= ~MS_RDONLY; 1176 #endif 1177 } 1178 UFS_SB(sb)->s_mount_opt = new_mount_opt; 1179 return 0; 1180 } 1181 1182 static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf) 1183 { 1184 struct super_block *sb = dentry->d_sb; 1185 struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi; 1186 unsigned flags = UFS_SB(sb)->s_flags; 1187 struct ufs_super_block_first *usb1; 1188 struct ufs_super_block_second *usb2; 1189 struct ufs_super_block_third *usb3; 1190 1191 lock_kernel(); 1192 1193 usb1 = ubh_get_usb_first(uspi); 1194 usb2 = ubh_get_usb_second(uspi); 1195 usb3 = ubh_get_usb_third(uspi); 1196 1197 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { 1198 buf->f_type = UFS2_MAGIC; 1199 buf->f_blocks = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize); 1200 } else { 1201 buf->f_type = UFS_MAGIC; 1202 buf->f_blocks = uspi->s_dsize; 1203 } 1204 buf->f_bfree = ufs_blkstofrags(uspi->cs_total.cs_nbfree) + 1205 uspi->cs_total.cs_nffree; 1206 buf->f_ffree = uspi->cs_total.cs_nifree; 1207 buf->f_bsize = sb->s_blocksize; 1208 buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree)) 1209 ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0; 1210 buf->f_files = uspi->s_ncg * uspi->s_ipg; 1211 buf->f_namelen = UFS_MAXNAMLEN; 1212 1213 unlock_kernel(); 1214 1215 return 0; 1216 } 1217 1218 static struct kmem_cache * ufs_inode_cachep; 1219 1220 static struct inode *ufs_alloc_inode(struct super_block *sb) 1221 { 1222 struct ufs_inode_info *ei; 1223 ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, GFP_KERNEL); 1224 if (!ei) 1225 return NULL; 1226 ei->vfs_inode.i_version = 1; 1227 return &ei->vfs_inode; 1228 } 1229 1230 static void ufs_destroy_inode(struct inode *inode) 1231 { 1232 kmem_cache_free(ufs_inode_cachep, UFS_I(inode)); 1233 } 1234 1235 static void init_once(void * foo, struct kmem_cache * cachep, unsigned long flags) 1236 { 1237 struct ufs_inode_info *ei = (struct ufs_inode_info *) foo; 1238 1239 inode_init_once(&ei->vfs_inode); 1240 } 1241 1242 static int init_inodecache(void) 1243 { 1244 ufs_inode_cachep = kmem_cache_create("ufs_inode_cache", 1245 sizeof(struct ufs_inode_info), 1246 0, (SLAB_RECLAIM_ACCOUNT| 1247 SLAB_MEM_SPREAD), 1248 init_once); 1249 if (ufs_inode_cachep == NULL) 1250 return -ENOMEM; 1251 return 0; 1252 } 1253 1254 static void destroy_inodecache(void) 1255 { 1256 kmem_cache_destroy(ufs_inode_cachep); 1257 } 1258 1259 #ifdef CONFIG_QUOTA 1260 static ssize_t ufs_quota_read(struct super_block *, int, char *,size_t, loff_t); 1261 static ssize_t ufs_quota_write(struct super_block *, int, const char *, size_t, loff_t); 1262 #endif 1263 1264 static const struct super_operations ufs_super_ops = { 1265 .alloc_inode = ufs_alloc_inode, 1266 .destroy_inode = ufs_destroy_inode, 1267 .read_inode = ufs_read_inode, 1268 .write_inode = ufs_write_inode, 1269 .delete_inode = ufs_delete_inode, 1270 .put_super = ufs_put_super, 1271 .write_super = ufs_write_super, 1272 .statfs = ufs_statfs, 1273 .remount_fs = ufs_remount, 1274 #ifdef CONFIG_QUOTA 1275 .quota_read = ufs_quota_read, 1276 .quota_write = ufs_quota_write, 1277 #endif 1278 }; 1279 1280 #ifdef CONFIG_QUOTA 1281 1282 /* Read data from quotafile - avoid pagecache and such because we cannot afford 1283 * acquiring the locks... As quota files are never truncated and quota code 1284 * itself serializes the operations (and noone else should touch the files) 1285 * we don't have to be afraid of races */ 1286 static ssize_t ufs_quota_read(struct super_block *sb, int type, char *data, 1287 size_t len, loff_t off) 1288 { 1289 struct inode *inode = sb_dqopt(sb)->files[type]; 1290 sector_t blk = off >> sb->s_blocksize_bits; 1291 int err = 0; 1292 int offset = off & (sb->s_blocksize - 1); 1293 int tocopy; 1294 size_t toread; 1295 struct buffer_head *bh; 1296 loff_t i_size = i_size_read(inode); 1297 1298 if (off > i_size) 1299 return 0; 1300 if (off+len > i_size) 1301 len = i_size-off; 1302 toread = len; 1303 while (toread > 0) { 1304 tocopy = sb->s_blocksize - offset < toread ? 1305 sb->s_blocksize - offset : toread; 1306 1307 bh = ufs_bread(inode, blk, 0, &err); 1308 if (err) 1309 return err; 1310 if (!bh) /* A hole? */ 1311 memset(data, 0, tocopy); 1312 else { 1313 memcpy(data, bh->b_data+offset, tocopy); 1314 brelse(bh); 1315 } 1316 offset = 0; 1317 toread -= tocopy; 1318 data += tocopy; 1319 blk++; 1320 } 1321 return len; 1322 } 1323 1324 /* Write to quotafile */ 1325 static ssize_t ufs_quota_write(struct super_block *sb, int type, 1326 const char *data, size_t len, loff_t off) 1327 { 1328 struct inode *inode = sb_dqopt(sb)->files[type]; 1329 sector_t blk = off >> sb->s_blocksize_bits; 1330 int err = 0; 1331 int offset = off & (sb->s_blocksize - 1); 1332 int tocopy; 1333 size_t towrite = len; 1334 struct buffer_head *bh; 1335 1336 mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); 1337 while (towrite > 0) { 1338 tocopy = sb->s_blocksize - offset < towrite ? 1339 sb->s_blocksize - offset : towrite; 1340 1341 bh = ufs_bread(inode, blk, 1, &err); 1342 if (!bh) 1343 goto out; 1344 lock_buffer(bh); 1345 memcpy(bh->b_data+offset, data, tocopy); 1346 flush_dcache_page(bh->b_page); 1347 set_buffer_uptodate(bh); 1348 mark_buffer_dirty(bh); 1349 unlock_buffer(bh); 1350 brelse(bh); 1351 offset = 0; 1352 towrite -= tocopy; 1353 data += tocopy; 1354 blk++; 1355 } 1356 out: 1357 if (len == towrite) { 1358 mutex_unlock(&inode->i_mutex); 1359 return err; 1360 } 1361 if (inode->i_size < off+len-towrite) 1362 i_size_write(inode, off+len-towrite); 1363 inode->i_version++; 1364 inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC; 1365 mark_inode_dirty(inode); 1366 mutex_unlock(&inode->i_mutex); 1367 return len - towrite; 1368 } 1369 1370 #endif 1371 1372 static int ufs_get_sb(struct file_system_type *fs_type, 1373 int flags, const char *dev_name, void *data, struct vfsmount *mnt) 1374 { 1375 return get_sb_bdev(fs_type, flags, dev_name, data, ufs_fill_super, mnt); 1376 } 1377 1378 static struct file_system_type ufs_fs_type = { 1379 .owner = THIS_MODULE, 1380 .name = "ufs", 1381 .get_sb = ufs_get_sb, 1382 .kill_sb = kill_block_super, 1383 .fs_flags = FS_REQUIRES_DEV, 1384 }; 1385 1386 static int __init init_ufs_fs(void) 1387 { 1388 int err = init_inodecache(); 1389 if (err) 1390 goto out1; 1391 err = register_filesystem(&ufs_fs_type); 1392 if (err) 1393 goto out; 1394 return 0; 1395 out: 1396 destroy_inodecache(); 1397 out1: 1398 return err; 1399 } 1400 1401 static void __exit exit_ufs_fs(void) 1402 { 1403 unregister_filesystem(&ufs_fs_type); 1404 destroy_inodecache(); 1405 } 1406 1407 module_init(init_ufs_fs) 1408 module_exit(exit_ufs_fs) 1409 MODULE_LICENSE("GPL"); 1410