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 #undef UFS_SUPER_DEBUG 94 #undef UFS_SUPER_DEBUG_MORE 95 96 97 #undef UFS_SUPER_DEBUG_MORE 98 #ifdef UFS_SUPER_DEBUG 99 #define UFSD(x) printk("(%s, %d), %s: ", __FILE__, __LINE__, __FUNCTION__); printk x; 100 #else 101 #define UFSD(x) 102 #endif 103 104 #ifdef UFS_SUPER_DEBUG_MORE 105 /* 106 * Print contents of ufs_super_block, useful for debugging 107 */ 108 void ufs_print_super_stuff(struct super_block *sb, 109 struct ufs_super_block_first * usb1, 110 struct ufs_super_block_second * usb2, 111 struct ufs_super_block_third * usb3) 112 { 113 printk("ufs_print_super_stuff\n"); 114 printk("size of usb: %u\n", sizeof(struct ufs_super_block)); 115 printk(" magic: 0x%x\n", fs32_to_cpu(sb, usb3->fs_magic)); 116 printk(" sblkno: %u\n", fs32_to_cpu(sb, usb1->fs_sblkno)); 117 printk(" cblkno: %u\n", fs32_to_cpu(sb, usb1->fs_cblkno)); 118 printk(" iblkno: %u\n", fs32_to_cpu(sb, usb1->fs_iblkno)); 119 printk(" dblkno: %u\n", fs32_to_cpu(sb, usb1->fs_dblkno)); 120 printk(" cgoffset: %u\n", fs32_to_cpu(sb, usb1->fs_cgoffset)); 121 printk(" ~cgmask: 0x%x\n", ~fs32_to_cpu(sb, usb1->fs_cgmask)); 122 printk(" size: %u\n", fs32_to_cpu(sb, usb1->fs_size)); 123 printk(" dsize: %u\n", fs32_to_cpu(sb, usb1->fs_dsize)); 124 printk(" ncg: %u\n", fs32_to_cpu(sb, usb1->fs_ncg)); 125 printk(" bsize: %u\n", fs32_to_cpu(sb, usb1->fs_bsize)); 126 printk(" fsize: %u\n", fs32_to_cpu(sb, usb1->fs_fsize)); 127 printk(" frag: %u\n", fs32_to_cpu(sb, usb1->fs_frag)); 128 printk(" fragshift: %u\n", fs32_to_cpu(sb, usb1->fs_fragshift)); 129 printk(" ~fmask: %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask)); 130 printk(" fshift: %u\n", fs32_to_cpu(sb, usb1->fs_fshift)); 131 printk(" sbsize: %u\n", fs32_to_cpu(sb, usb1->fs_sbsize)); 132 printk(" spc: %u\n", fs32_to_cpu(sb, usb1->fs_spc)); 133 printk(" cpg: %u\n", fs32_to_cpu(sb, usb1->fs_cpg)); 134 printk(" ipg: %u\n", fs32_to_cpu(sb, usb1->fs_ipg)); 135 printk(" fpg: %u\n", fs32_to_cpu(sb, usb1->fs_fpg)); 136 printk(" csaddr: %u\n", fs32_to_cpu(sb, usb1->fs_csaddr)); 137 printk(" cssize: %u\n", fs32_to_cpu(sb, usb1->fs_cssize)); 138 printk(" cgsize: %u\n", fs32_to_cpu(sb, usb1->fs_cgsize)); 139 printk(" fstodb: %u\n", fs32_to_cpu(sb, usb1->fs_fsbtodb)); 140 printk(" contigsumsize: %d\n", fs32_to_cpu(sb, usb3->fs_u2.fs_44.fs_contigsumsize)); 141 printk(" postblformat: %u\n", fs32_to_cpu(sb, usb3->fs_postblformat)); 142 printk(" nrpos: %u\n", fs32_to_cpu(sb, usb3->fs_nrpos)); 143 printk(" ndir %u\n", fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir)); 144 printk(" nifree %u\n", fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree)); 145 printk(" nbfree %u\n", fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree)); 146 printk(" nffree %u\n", fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree)); 147 printk("\n"); 148 } 149 150 /* 151 * Print contents of ufs2 ufs_super_block, useful for debugging 152 */ 153 void ufs2_print_super_stuff( 154 struct super_block *sb, 155 struct ufs_super_block *usb) 156 { 157 printk("ufs_print_super_stuff\n"); 158 printk("size of usb: %u\n", sizeof(struct ufs_super_block)); 159 printk(" magic: 0x%x\n", fs32_to_cpu(sb, usb->fs_magic)); 160 printk(" fs_size: %u\n",fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_size)); 161 printk(" fs_dsize: %u\n",fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_dsize)); 162 printk(" bsize: %u\n", fs32_to_cpu(usb, usb->fs_bsize)); 163 printk(" fsize: %u\n", fs32_to_cpu(usb, usb->fs_fsize)); 164 printk(" fs_volname: %s\n", usb->fs_u11.fs_u2.fs_volname); 165 printk(" fs_fsmnt: %s\n", usb->fs_u11.fs_u2.fs_fsmnt); 166 printk(" fs_sblockloc: %u\n",fs64_to_cpu(sb, 167 usb->fs_u11.fs_u2.fs_sblockloc)); 168 printk(" cs_ndir(No of dirs): %u\n",fs64_to_cpu(sb, 169 usb->fs_u11.fs_u2.fs_cstotal.cs_ndir)); 170 printk(" cs_nbfree(No of free blocks): %u\n",fs64_to_cpu(sb, 171 usb->fs_u11.fs_u2.fs_cstotal.cs_nbfree)); 172 printk("\n"); 173 } 174 175 /* 176 * Print contents of ufs_cylinder_group, useful for debugging 177 */ 178 void ufs_print_cylinder_stuff(struct super_block *sb, struct ufs_cylinder_group *cg) 179 { 180 printk("\nufs_print_cylinder_stuff\n"); 181 printk("size of ucg: %u\n", sizeof(struct ufs_cylinder_group)); 182 printk(" magic: %x\n", fs32_to_cpu(sb, cg->cg_magic)); 183 printk(" time: %u\n", fs32_to_cpu(sb, cg->cg_time)); 184 printk(" cgx: %u\n", fs32_to_cpu(sb, cg->cg_cgx)); 185 printk(" ncyl: %u\n", fs16_to_cpu(sb, cg->cg_ncyl)); 186 printk(" niblk: %u\n", fs16_to_cpu(sb, cg->cg_niblk)); 187 printk(" ndblk: %u\n", fs32_to_cpu(sb, cg->cg_ndblk)); 188 printk(" cs_ndir: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir)); 189 printk(" cs_nbfree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree)); 190 printk(" cs_nifree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree)); 191 printk(" cs_nffree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree)); 192 printk(" rotor: %u\n", fs32_to_cpu(sb, cg->cg_rotor)); 193 printk(" frotor: %u\n", fs32_to_cpu(sb, cg->cg_frotor)); 194 printk(" irotor: %u\n", fs32_to_cpu(sb, cg->cg_irotor)); 195 printk(" frsum: %u, %u, %u, %u, %u, %u, %u, %u\n", 196 fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]), 197 fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]), 198 fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]), 199 fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7])); 200 printk(" btotoff: %u\n", fs32_to_cpu(sb, cg->cg_btotoff)); 201 printk(" boff: %u\n", fs32_to_cpu(sb, cg->cg_boff)); 202 printk(" iuseoff: %u\n", fs32_to_cpu(sb, cg->cg_iusedoff)); 203 printk(" freeoff: %u\n", fs32_to_cpu(sb, cg->cg_freeoff)); 204 printk(" nextfreeoff: %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff)); 205 printk(" clustersumoff %u\n", fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff)); 206 printk(" clusteroff %u\n", fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff)); 207 printk(" nclusterblks %u\n", fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks)); 208 printk("\n"); 209 } 210 #endif /* UFS_SUPER_DEBUG_MORE */ 211 212 static struct super_operations ufs_super_ops; 213 214 static char error_buf[1024]; 215 216 void ufs_error (struct super_block * sb, const char * function, 217 const char * fmt, ...) 218 { 219 struct ufs_sb_private_info * uspi; 220 struct ufs_super_block_first * usb1; 221 va_list args; 222 223 uspi = UFS_SB(sb)->s_uspi; 224 usb1 = ubh_get_usb_first(uspi); 225 226 if (!(sb->s_flags & MS_RDONLY)) { 227 usb1->fs_clean = UFS_FSBAD; 228 ubh_mark_buffer_dirty(USPI_UBH); 229 sb->s_dirt = 1; 230 sb->s_flags |= MS_RDONLY; 231 } 232 va_start (args, fmt); 233 vsprintf (error_buf, fmt, args); 234 va_end (args); 235 switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) { 236 case UFS_MOUNT_ONERROR_PANIC: 237 panic ("UFS-fs panic (device %s): %s: %s\n", 238 sb->s_id, function, error_buf); 239 240 case UFS_MOUNT_ONERROR_LOCK: 241 case UFS_MOUNT_ONERROR_UMOUNT: 242 case UFS_MOUNT_ONERROR_REPAIR: 243 printk (KERN_CRIT "UFS-fs error (device %s): %s: %s\n", 244 sb->s_id, function, error_buf); 245 } 246 } 247 248 void ufs_panic (struct super_block * sb, const char * function, 249 const char * fmt, ...) 250 { 251 struct ufs_sb_private_info * uspi; 252 struct ufs_super_block_first * usb1; 253 va_list args; 254 255 uspi = UFS_SB(sb)->s_uspi; 256 usb1 = ubh_get_usb_first(uspi); 257 258 if (!(sb->s_flags & MS_RDONLY)) { 259 usb1->fs_clean = UFS_FSBAD; 260 ubh_mark_buffer_dirty(USPI_UBH); 261 sb->s_dirt = 1; 262 } 263 va_start (args, fmt); 264 vsprintf (error_buf, fmt, args); 265 va_end (args); 266 sb->s_flags |= MS_RDONLY; 267 printk (KERN_CRIT "UFS-fs panic (device %s): %s: %s\n", 268 sb->s_id, function, error_buf); 269 } 270 271 void ufs_warning (struct super_block * sb, const char * function, 272 const char * fmt, ...) 273 { 274 va_list args; 275 276 va_start (args, fmt); 277 vsprintf (error_buf, fmt, args); 278 va_end (args); 279 printk (KERN_WARNING "UFS-fs warning (device %s): %s: %s\n", 280 sb->s_id, function, error_buf); 281 } 282 283 enum { 284 Opt_type_old, Opt_type_sunx86, Opt_type_sun, Opt_type_44bsd, 285 Opt_type_ufs2, Opt_type_hp, Opt_type_nextstepcd, Opt_type_nextstep, 286 Opt_type_openstep, Opt_onerror_panic, Opt_onerror_lock, 287 Opt_onerror_umount, Opt_onerror_repair, Opt_err 288 }; 289 290 static match_table_t tokens = { 291 {Opt_type_old, "ufstype=old"}, 292 {Opt_type_sunx86, "ufstype=sunx86"}, 293 {Opt_type_sun, "ufstype=sun"}, 294 {Opt_type_44bsd, "ufstype=44bsd"}, 295 {Opt_type_ufs2, "ufstype=ufs2"}, 296 {Opt_type_ufs2, "ufstype=5xbsd"}, 297 {Opt_type_hp, "ufstype=hp"}, 298 {Opt_type_nextstepcd, "ufstype=nextstep-cd"}, 299 {Opt_type_nextstep, "ufstype=nextstep"}, 300 {Opt_type_openstep, "ufstype=openstep"}, 301 {Opt_onerror_panic, "onerror=panic"}, 302 {Opt_onerror_lock, "onerror=lock"}, 303 {Opt_onerror_umount, "onerror=umount"}, 304 {Opt_onerror_repair, "onerror=repair"}, 305 {Opt_err, NULL} 306 }; 307 308 static int ufs_parse_options (char * options, unsigned * mount_options) 309 { 310 char * p; 311 312 UFSD(("ENTER\n")) 313 314 if (!options) 315 return 1; 316 317 while ((p = strsep(&options, ",")) != NULL) { 318 substring_t args[MAX_OPT_ARGS]; 319 int token; 320 if (!*p) 321 continue; 322 323 token = match_token(p, tokens, args); 324 switch (token) { 325 case Opt_type_old: 326 ufs_clear_opt (*mount_options, UFSTYPE); 327 ufs_set_opt (*mount_options, UFSTYPE_OLD); 328 break; 329 case Opt_type_sunx86: 330 ufs_clear_opt (*mount_options, UFSTYPE); 331 ufs_set_opt (*mount_options, UFSTYPE_SUNx86); 332 break; 333 case Opt_type_sun: 334 ufs_clear_opt (*mount_options, UFSTYPE); 335 ufs_set_opt (*mount_options, UFSTYPE_SUN); 336 break; 337 case Opt_type_44bsd: 338 ufs_clear_opt (*mount_options, UFSTYPE); 339 ufs_set_opt (*mount_options, UFSTYPE_44BSD); 340 break; 341 case Opt_type_ufs2: 342 ufs_clear_opt(*mount_options, UFSTYPE); 343 ufs_set_opt(*mount_options, UFSTYPE_UFS2); 344 break; 345 case Opt_type_hp: 346 ufs_clear_opt (*mount_options, UFSTYPE); 347 ufs_set_opt (*mount_options, UFSTYPE_HP); 348 break; 349 case Opt_type_nextstepcd: 350 ufs_clear_opt (*mount_options, UFSTYPE); 351 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD); 352 break; 353 case Opt_type_nextstep: 354 ufs_clear_opt (*mount_options, UFSTYPE); 355 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP); 356 break; 357 case Opt_type_openstep: 358 ufs_clear_opt (*mount_options, UFSTYPE); 359 ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP); 360 break; 361 case Opt_onerror_panic: 362 ufs_clear_opt (*mount_options, ONERROR); 363 ufs_set_opt (*mount_options, ONERROR_PANIC); 364 break; 365 case Opt_onerror_lock: 366 ufs_clear_opt (*mount_options, ONERROR); 367 ufs_set_opt (*mount_options, ONERROR_LOCK); 368 break; 369 case Opt_onerror_umount: 370 ufs_clear_opt (*mount_options, ONERROR); 371 ufs_set_opt (*mount_options, ONERROR_UMOUNT); 372 break; 373 case Opt_onerror_repair: 374 printk("UFS-fs: Unable to do repair on error, " 375 "will lock lock instead\n"); 376 ufs_clear_opt (*mount_options, ONERROR); 377 ufs_set_opt (*mount_options, ONERROR_REPAIR); 378 break; 379 default: 380 printk("UFS-fs: Invalid option: \"%s\" " 381 "or missing value\n", p); 382 return 0; 383 } 384 } 385 return 1; 386 } 387 388 /* 389 * Read on-disk structures associated with cylinder groups 390 */ 391 static int ufs_read_cylinder_structures (struct super_block *sb) 392 { 393 struct ufs_sb_info * sbi = UFS_SB(sb); 394 struct ufs_sb_private_info * uspi; 395 struct ufs_super_block *usb; 396 struct ufs_buffer_head * ubh; 397 unsigned char * base, * space; 398 unsigned size, blks, i; 399 unsigned flags = 0; 400 401 UFSD(("ENTER\n")) 402 403 uspi = sbi->s_uspi; 404 405 usb = (struct ufs_super_block *) 406 ((struct ufs_buffer_head *)uspi)->bh[0]->b_data; 407 408 flags = UFS_SB(sb)->s_flags; 409 410 /* 411 * Read cs structures from (usually) first data block 412 * on the device. 413 */ 414 size = uspi->s_cssize; 415 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift; 416 base = space = kmalloc(size, GFP_KERNEL); 417 if (!base) 418 goto failed; 419 sbi->s_csp = (struct ufs_csum *)space; 420 for (i = 0; i < blks; i += uspi->s_fpb) { 421 size = uspi->s_bsize; 422 if (i + uspi->s_fpb > blks) 423 size = (blks - i) * uspi->s_fsize; 424 425 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) 426 ubh = ubh_bread(sb, 427 fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_csaddr) + i, size); 428 else 429 ubh = ubh_bread(sb, uspi->s_csaddr + i, size); 430 431 if (!ubh) 432 goto failed; 433 434 ubh_ubhcpymem (space, ubh, size); 435 436 space += size; 437 ubh_brelse (ubh); 438 ubh = NULL; 439 } 440 441 /* 442 * Read cylinder group (we read only first fragment from block 443 * at this time) and prepare internal data structures for cg caching. 444 */ 445 if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_KERNEL))) 446 goto failed; 447 for (i = 0; i < uspi->s_ncg; i++) 448 sbi->s_ucg[i] = NULL; 449 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) { 450 sbi->s_ucpi[i] = NULL; 451 sbi->s_cgno[i] = UFS_CGNO_EMPTY; 452 } 453 for (i = 0; i < uspi->s_ncg; i++) { 454 UFSD(("read cg %u\n", i)) 455 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i)))) 456 goto failed; 457 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data)) 458 goto failed; 459 #ifdef UFS_SUPER_DEBUG_MORE 460 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data); 461 #endif 462 } 463 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) { 464 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_KERNEL))) 465 goto failed; 466 sbi->s_cgno[i] = UFS_CGNO_EMPTY; 467 } 468 sbi->s_cg_loaded = 0; 469 UFSD(("EXIT\n")) 470 return 1; 471 472 failed: 473 kfree (base); 474 if (sbi->s_ucg) { 475 for (i = 0; i < uspi->s_ncg; i++) 476 if (sbi->s_ucg[i]) 477 brelse (sbi->s_ucg[i]); 478 kfree (sbi->s_ucg); 479 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) 480 kfree (sbi->s_ucpi[i]); 481 } 482 UFSD(("EXIT (FAILED)\n")) 483 return 0; 484 } 485 486 /* 487 * Put on-disk structures associated with cylinder groups and 488 * write them back to disk 489 */ 490 static void ufs_put_cylinder_structures (struct super_block *sb) 491 { 492 struct ufs_sb_info * sbi = UFS_SB(sb); 493 struct ufs_sb_private_info * uspi; 494 struct ufs_buffer_head * ubh; 495 unsigned char * base, * space; 496 unsigned blks, size, i; 497 498 UFSD(("ENTER\n")) 499 500 uspi = sbi->s_uspi; 501 502 size = uspi->s_cssize; 503 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift; 504 base = space = (char*) sbi->s_csp; 505 for (i = 0; i < blks; i += uspi->s_fpb) { 506 size = uspi->s_bsize; 507 if (i + uspi->s_fpb > blks) 508 size = (blks - i) * uspi->s_fsize; 509 ubh = ubh_bread(sb, uspi->s_csaddr + i, size); 510 ubh_memcpyubh (ubh, space, size); 511 space += size; 512 ubh_mark_buffer_uptodate (ubh, 1); 513 ubh_mark_buffer_dirty (ubh); 514 ubh_brelse (ubh); 515 } 516 for (i = 0; i < sbi->s_cg_loaded; i++) { 517 ufs_put_cylinder (sb, i); 518 kfree (sbi->s_ucpi[i]); 519 } 520 for (; i < UFS_MAX_GROUP_LOADED; i++) 521 kfree (sbi->s_ucpi[i]); 522 for (i = 0; i < uspi->s_ncg; i++) 523 brelse (sbi->s_ucg[i]); 524 kfree (sbi->s_ucg); 525 kfree (base); 526 UFSD(("EXIT\n")) 527 } 528 529 static int ufs_fill_super(struct super_block *sb, void *data, int silent) 530 { 531 struct ufs_sb_info * sbi; 532 struct ufs_sb_private_info * uspi; 533 struct ufs_super_block_first * usb1; 534 struct ufs_super_block_second * usb2; 535 struct ufs_super_block_third * usb3; 536 struct ufs_super_block *usb; 537 struct ufs_buffer_head * ubh; 538 struct inode *inode; 539 unsigned block_size, super_block_size; 540 unsigned flags; 541 unsigned super_block_offset; 542 543 uspi = NULL; 544 ubh = NULL; 545 flags = 0; 546 547 UFSD(("ENTER\n")) 548 549 sbi = kmalloc(sizeof(struct ufs_sb_info), GFP_KERNEL); 550 if (!sbi) 551 goto failed_nomem; 552 sb->s_fs_info = sbi; 553 memset(sbi, 0, sizeof(struct ufs_sb_info)); 554 555 UFSD(("flag %u\n", (int)(sb->s_flags & MS_RDONLY))) 556 557 #ifndef CONFIG_UFS_FS_WRITE 558 if (!(sb->s_flags & MS_RDONLY)) { 559 printk("ufs was compiled with read-only support, " 560 "can't be mounted as read-write\n"); 561 goto failed; 562 } 563 #endif 564 /* 565 * Set default mount options 566 * Parse mount options 567 */ 568 sbi->s_mount_opt = 0; 569 ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK); 570 if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) { 571 printk("wrong mount options\n"); 572 goto failed; 573 } 574 if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) { 575 if (!silent) 576 printk("You didn't specify the type of your ufs filesystem\n\n" 577 "mount -t ufs -o ufstype=" 578 "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n" 579 ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, " 580 "default is ufstype=old\n"); 581 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD); 582 } 583 584 sbi->s_uspi = uspi = 585 kmalloc (sizeof(struct ufs_sb_private_info), GFP_KERNEL); 586 if (!uspi) 587 goto failed; 588 589 super_block_offset=UFS_SBLOCK; 590 591 /* Keep 2Gig file limit. Some UFS variants need to override 592 this but as I don't know which I'll let those in the know loosen 593 the rules */ 594 switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) { 595 case UFS_MOUNT_UFSTYPE_44BSD: 596 UFSD(("ufstype=44bsd\n")) 597 uspi->s_fsize = block_size = 512; 598 uspi->s_fmask = ~(512 - 1); 599 uspi->s_fshift = 9; 600 uspi->s_sbsize = super_block_size = 1536; 601 uspi->s_sbbase = 0; 602 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; 603 break; 604 case UFS_MOUNT_UFSTYPE_UFS2: 605 UFSD(("ufstype=ufs2\n")); 606 super_block_offset=SBLOCK_UFS2; 607 uspi->s_fsize = block_size = 512; 608 uspi->s_fmask = ~(512 - 1); 609 uspi->s_fshift = 9; 610 uspi->s_sbsize = super_block_size = 1536; 611 uspi->s_sbbase = 0; 612 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; 613 if (!(sb->s_flags & MS_RDONLY)) { 614 printk(KERN_INFO "ufstype=ufs2 is supported read-only\n"); 615 sb->s_flags |= MS_RDONLY; 616 } 617 break; 618 619 case UFS_MOUNT_UFSTYPE_SUN: 620 UFSD(("ufstype=sun\n")) 621 uspi->s_fsize = block_size = 1024; 622 uspi->s_fmask = ~(1024 - 1); 623 uspi->s_fshift = 10; 624 uspi->s_sbsize = super_block_size = 2048; 625 uspi->s_sbbase = 0; 626 uspi->s_maxsymlinklen = 56; 627 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN; 628 break; 629 630 case UFS_MOUNT_UFSTYPE_SUNx86: 631 UFSD(("ufstype=sunx86\n")) 632 uspi->s_fsize = block_size = 1024; 633 uspi->s_fmask = ~(1024 - 1); 634 uspi->s_fshift = 10; 635 uspi->s_sbsize = super_block_size = 2048; 636 uspi->s_sbbase = 0; 637 uspi->s_maxsymlinklen = 56; 638 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN; 639 break; 640 641 case UFS_MOUNT_UFSTYPE_OLD: 642 UFSD(("ufstype=old\n")) 643 uspi->s_fsize = block_size = 1024; 644 uspi->s_fmask = ~(1024 - 1); 645 uspi->s_fshift = 10; 646 uspi->s_sbsize = super_block_size = 2048; 647 uspi->s_sbbase = 0; 648 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 649 if (!(sb->s_flags & MS_RDONLY)) { 650 if (!silent) 651 printk(KERN_INFO "ufstype=old is supported read-only\n"); 652 sb->s_flags |= MS_RDONLY; 653 } 654 break; 655 656 case UFS_MOUNT_UFSTYPE_NEXTSTEP: 657 UFSD(("ufstype=nextstep\n")) 658 uspi->s_fsize = block_size = 1024; 659 uspi->s_fmask = ~(1024 - 1); 660 uspi->s_fshift = 10; 661 uspi->s_sbsize = super_block_size = 2048; 662 uspi->s_sbbase = 0; 663 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 664 if (!(sb->s_flags & MS_RDONLY)) { 665 if (!silent) 666 printk(KERN_INFO "ufstype=nextstep is supported read-only\n"); 667 sb->s_flags |= MS_RDONLY; 668 } 669 break; 670 671 case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD: 672 UFSD(("ufstype=nextstep-cd\n")) 673 uspi->s_fsize = block_size = 2048; 674 uspi->s_fmask = ~(2048 - 1); 675 uspi->s_fshift = 11; 676 uspi->s_sbsize = super_block_size = 2048; 677 uspi->s_sbbase = 0; 678 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 679 if (!(sb->s_flags & MS_RDONLY)) { 680 if (!silent) 681 printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n"); 682 sb->s_flags |= MS_RDONLY; 683 } 684 break; 685 686 case UFS_MOUNT_UFSTYPE_OPENSTEP: 687 UFSD(("ufstype=openstep\n")) 688 uspi->s_fsize = block_size = 1024; 689 uspi->s_fmask = ~(1024 - 1); 690 uspi->s_fshift = 10; 691 uspi->s_sbsize = super_block_size = 2048; 692 uspi->s_sbbase = 0; 693 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; 694 if (!(sb->s_flags & MS_RDONLY)) { 695 if (!silent) 696 printk(KERN_INFO "ufstype=openstep is supported read-only\n"); 697 sb->s_flags |= MS_RDONLY; 698 } 699 break; 700 701 case UFS_MOUNT_UFSTYPE_HP: 702 UFSD(("ufstype=hp\n")) 703 uspi->s_fsize = block_size = 1024; 704 uspi->s_fmask = ~(1024 - 1); 705 uspi->s_fshift = 10; 706 uspi->s_sbsize = super_block_size = 2048; 707 uspi->s_sbbase = 0; 708 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; 709 if (!(sb->s_flags & MS_RDONLY)) { 710 if (!silent) 711 printk(KERN_INFO "ufstype=hp is supported read-only\n"); 712 sb->s_flags |= MS_RDONLY; 713 } 714 break; 715 default: 716 if (!silent) 717 printk("unknown ufstype\n"); 718 goto failed; 719 } 720 721 again: 722 if (!sb_set_blocksize(sb, block_size)) { 723 printk(KERN_ERR "UFS: failed to set blocksize\n"); 724 goto failed; 725 } 726 727 /* 728 * read ufs super block from device 729 */ 730 731 ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size); 732 733 if (!ubh) 734 goto failed; 735 736 737 usb1 = ubh_get_usb_first(uspi); 738 usb2 = ubh_get_usb_second(uspi); 739 usb3 = ubh_get_usb_third(uspi); 740 usb = (struct ufs_super_block *) 741 ((struct ufs_buffer_head *)uspi)->bh[0]->b_data ; 742 743 /* 744 * Check ufs magic number 745 */ 746 sbi->s_bytesex = BYTESEX_LE; 747 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) { 748 case UFS_MAGIC: 749 case UFS2_MAGIC: 750 case UFS_MAGIC_LFN: 751 case UFS_MAGIC_FEA: 752 case UFS_MAGIC_4GB: 753 goto magic_found; 754 } 755 sbi->s_bytesex = BYTESEX_BE; 756 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) { 757 case UFS_MAGIC: 758 case UFS2_MAGIC: 759 case UFS_MAGIC_LFN: 760 case UFS_MAGIC_FEA: 761 case UFS_MAGIC_4GB: 762 goto magic_found; 763 } 764 765 if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP) 766 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD) 767 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP)) 768 && uspi->s_sbbase < 256) { 769 ubh_brelse_uspi(uspi); 770 ubh = NULL; 771 uspi->s_sbbase += 8; 772 goto again; 773 } 774 if (!silent) 775 printk("ufs_read_super: bad magic number\n"); 776 goto failed; 777 778 magic_found: 779 /* 780 * Check block and fragment sizes 781 */ 782 uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize); 783 uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize); 784 uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize); 785 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask); 786 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift); 787 788 if (uspi->s_fsize & (uspi->s_fsize - 1)) { 789 printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n", 790 uspi->s_fsize); 791 goto failed; 792 } 793 if (uspi->s_fsize < 512) { 794 printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n", 795 uspi->s_fsize); 796 goto failed; 797 } 798 if (uspi->s_fsize > 4096) { 799 printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n", 800 uspi->s_fsize); 801 goto failed; 802 } 803 if (uspi->s_bsize & (uspi->s_bsize - 1)) { 804 printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n", 805 uspi->s_bsize); 806 goto failed; 807 } 808 if (uspi->s_bsize < 4096) { 809 printk(KERN_ERR "ufs_read_super: block size %u is too small\n", 810 uspi->s_bsize); 811 goto failed; 812 } 813 if (uspi->s_bsize / uspi->s_fsize > 8) { 814 printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n", 815 uspi->s_bsize / uspi->s_fsize); 816 goto failed; 817 } 818 if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) { 819 ubh_brelse_uspi(uspi); 820 ubh = NULL; 821 block_size = uspi->s_fsize; 822 super_block_size = uspi->s_sbsize; 823 UFSD(("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size)) 824 goto again; 825 } 826 827 #ifdef UFS_SUPER_DEBUG_MORE 828 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) 829 ufs2_print_super_stuff(sb,usb); 830 else 831 ufs_print_super_stuff(sb, usb1, usb2, usb3); 832 #endif 833 834 /* 835 * Check, if file system was correctly unmounted. 836 * If not, make it read only. 837 */ 838 if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) || 839 ((flags & UFS_ST_MASK) == UFS_ST_OLD) || 840 (((flags & UFS_ST_MASK) == UFS_ST_SUN || 841 (flags & UFS_ST_MASK) == UFS_ST_SUNx86) && 842 (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) { 843 switch(usb1->fs_clean) { 844 case UFS_FSCLEAN: 845 UFSD(("fs is clean\n")) 846 break; 847 case UFS_FSSTABLE: 848 UFSD(("fs is stable\n")) 849 break; 850 case UFS_FSOSF1: 851 UFSD(("fs is DEC OSF/1\n")) 852 break; 853 case UFS_FSACTIVE: 854 printk("ufs_read_super: fs is active\n"); 855 sb->s_flags |= MS_RDONLY; 856 break; 857 case UFS_FSBAD: 858 printk("ufs_read_super: fs is bad\n"); 859 sb->s_flags |= MS_RDONLY; 860 break; 861 default: 862 printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean); 863 sb->s_flags |= MS_RDONLY; 864 break; 865 } 866 } 867 else { 868 printk("ufs_read_super: fs needs fsck\n"); 869 sb->s_flags |= MS_RDONLY; 870 } 871 872 /* 873 * Read ufs_super_block into internal data structures 874 */ 875 sb->s_op = &ufs_super_ops; 876 sb->dq_op = NULL; /***/ 877 sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic); 878 879 uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno); 880 uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno); 881 uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno); 882 uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno); 883 uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset); 884 uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask); 885 886 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { 887 uspi->s_u2_size = fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_size); 888 uspi->s_u2_dsize = fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_dsize); 889 } 890 else { 891 uspi->s_size = fs32_to_cpu(sb, usb1->fs_size); 892 uspi->s_dsize = fs32_to_cpu(sb, usb1->fs_dsize); 893 } 894 895 uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg); 896 /* s_bsize already set */ 897 /* s_fsize already set */ 898 uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag); 899 uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree); 900 uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask); 901 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask); 902 uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift); 903 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift); 904 UFSD(("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift, 905 uspi->s_fshift)); 906 uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift); 907 uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb); 908 /* s_sbsize already set */ 909 uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask); 910 uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift); 911 uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir); 912 uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb); 913 uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf); 914 uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3); 915 uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave); 916 uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew); 917 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr); 918 uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize); 919 uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize); 920 uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak); 921 uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect); 922 uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc); 923 uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg); 924 uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg); 925 uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_cpc); 926 uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_u2.fs_44.fs_contigsumsize); 927 uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3); 928 uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3); 929 uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat); 930 uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos); 931 uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff); 932 uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff); 933 934 /* 935 * Compute another frequently used values 936 */ 937 uspi->s_fpbmask = uspi->s_fpb - 1; 938 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { 939 uspi->s_apbshift = uspi->s_bshift - 3; 940 } 941 else { 942 uspi->s_apbshift = uspi->s_bshift - 2; 943 } 944 uspi->s_2apbshift = uspi->s_apbshift * 2; 945 uspi->s_3apbshift = uspi->s_apbshift * 3; 946 uspi->s_apb = 1 << uspi->s_apbshift; 947 uspi->s_2apb = 1 << uspi->s_2apbshift; 948 uspi->s_3apb = 1 << uspi->s_3apbshift; 949 uspi->s_apbmask = uspi->s_apb - 1; 950 uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS; 951 uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift; 952 uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift; 953 uspi->s_bpf = uspi->s_fsize << 3; 954 uspi->s_bpfshift = uspi->s_fshift + 3; 955 uspi->s_bpfmask = uspi->s_bpf - 1; 956 if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == 957 UFS_MOUNT_UFSTYPE_44BSD) 958 uspi->s_maxsymlinklen = 959 fs32_to_cpu(sb, usb3->fs_u2.fs_44.fs_maxsymlinklen); 960 961 sbi->s_flags = flags; 962 963 inode = iget(sb, UFS_ROOTINO); 964 if (!inode || is_bad_inode(inode)) 965 goto failed; 966 sb->s_root = d_alloc_root(inode); 967 if (!sb->s_root) 968 goto dalloc_failed; 969 970 971 /* 972 * Read cylinder group structures 973 */ 974 if (!(sb->s_flags & MS_RDONLY)) 975 if (!ufs_read_cylinder_structures(sb)) 976 goto failed; 977 978 UFSD(("EXIT\n")) 979 return 0; 980 981 dalloc_failed: 982 iput(inode); 983 failed: 984 if (ubh) 985 ubh_brelse_uspi (uspi); 986 kfree (uspi); 987 kfree(sbi); 988 sb->s_fs_info = NULL; 989 UFSD(("EXIT (FAILED)\n")) 990 return -EINVAL; 991 992 failed_nomem: 993 UFSD(("EXIT (NOMEM)\n")) 994 return -ENOMEM; 995 } 996 997 static void ufs_write_super (struct super_block *sb) { 998 struct ufs_sb_private_info * uspi; 999 struct ufs_super_block_first * usb1; 1000 struct ufs_super_block_third * usb3; 1001 unsigned flags; 1002 1003 lock_kernel(); 1004 1005 UFSD(("ENTER\n")) 1006 flags = UFS_SB(sb)->s_flags; 1007 uspi = UFS_SB(sb)->s_uspi; 1008 usb1 = ubh_get_usb_first(uspi); 1009 usb3 = ubh_get_usb_third(uspi); 1010 1011 if (!(sb->s_flags & MS_RDONLY)) { 1012 usb1->fs_time = cpu_to_fs32(sb, get_seconds()); 1013 if ((flags & UFS_ST_MASK) == UFS_ST_SUN 1014 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86) 1015 ufs_set_fs_state(sb, usb1, usb3, 1016 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time)); 1017 ubh_mark_buffer_dirty (USPI_UBH); 1018 } 1019 sb->s_dirt = 0; 1020 UFSD(("EXIT\n")) 1021 unlock_kernel(); 1022 } 1023 1024 static void ufs_put_super (struct super_block *sb) 1025 { 1026 struct ufs_sb_info * sbi = UFS_SB(sb); 1027 1028 UFSD(("ENTER\n")) 1029 1030 if (!(sb->s_flags & MS_RDONLY)) 1031 ufs_put_cylinder_structures (sb); 1032 1033 ubh_brelse_uspi (sbi->s_uspi); 1034 kfree (sbi->s_uspi); 1035 kfree (sbi); 1036 sb->s_fs_info = NULL; 1037 return; 1038 } 1039 1040 1041 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data) 1042 { 1043 struct ufs_sb_private_info * uspi; 1044 struct ufs_super_block_first * usb1; 1045 struct ufs_super_block_third * usb3; 1046 unsigned new_mount_opt, ufstype; 1047 unsigned flags; 1048 1049 uspi = UFS_SB(sb)->s_uspi; 1050 flags = UFS_SB(sb)->s_flags; 1051 usb1 = ubh_get_usb_first(uspi); 1052 usb3 = ubh_get_usb_third(uspi); 1053 1054 /* 1055 * Allow the "check" option to be passed as a remount option. 1056 * It is not possible to change ufstype option during remount 1057 */ 1058 ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE; 1059 new_mount_opt = 0; 1060 ufs_set_opt (new_mount_opt, ONERROR_LOCK); 1061 if (!ufs_parse_options (data, &new_mount_opt)) 1062 return -EINVAL; 1063 if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) { 1064 new_mount_opt |= ufstype; 1065 } 1066 else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) { 1067 printk("ufstype can't be changed during remount\n"); 1068 return -EINVAL; 1069 } 1070 1071 if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) { 1072 UFS_SB(sb)->s_mount_opt = new_mount_opt; 1073 return 0; 1074 } 1075 1076 /* 1077 * fs was mouted as rw, remounting ro 1078 */ 1079 if (*mount_flags & MS_RDONLY) { 1080 ufs_put_cylinder_structures(sb); 1081 usb1->fs_time = cpu_to_fs32(sb, get_seconds()); 1082 if ((flags & UFS_ST_MASK) == UFS_ST_SUN 1083 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86) 1084 ufs_set_fs_state(sb, usb1, usb3, 1085 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time)); 1086 ubh_mark_buffer_dirty (USPI_UBH); 1087 sb->s_dirt = 0; 1088 sb->s_flags |= MS_RDONLY; 1089 } 1090 /* 1091 * fs was mounted as ro, remounting rw 1092 */ 1093 else { 1094 #ifndef CONFIG_UFS_FS_WRITE 1095 printk("ufs was compiled with read-only support, " 1096 "can't be mounted as read-write\n"); 1097 return -EINVAL; 1098 #else 1099 if (ufstype != UFS_MOUNT_UFSTYPE_SUN && 1100 ufstype != UFS_MOUNT_UFSTYPE_44BSD && 1101 ufstype != UFS_MOUNT_UFSTYPE_SUNx86) { 1102 printk("this ufstype is read-only supported\n"); 1103 return -EINVAL; 1104 } 1105 if (!ufs_read_cylinder_structures (sb)) { 1106 printk("failed during remounting\n"); 1107 return -EPERM; 1108 } 1109 sb->s_flags &= ~MS_RDONLY; 1110 #endif 1111 } 1112 UFS_SB(sb)->s_mount_opt = new_mount_opt; 1113 return 0; 1114 } 1115 1116 static int ufs_statfs (struct super_block *sb, struct kstatfs *buf) 1117 { 1118 struct ufs_sb_private_info * uspi; 1119 struct ufs_super_block_first * usb1; 1120 struct ufs_super_block * usb; 1121 unsigned flags = 0; 1122 1123 lock_kernel(); 1124 1125 uspi = UFS_SB(sb)->s_uspi; 1126 usb1 = ubh_get_usb_first (uspi); 1127 usb = (struct ufs_super_block *) 1128 ((struct ufs_buffer_head *)uspi)->bh[0]->b_data ; 1129 1130 flags = UFS_SB(sb)->s_flags; 1131 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { 1132 buf->f_type = UFS2_MAGIC; 1133 buf->f_blocks = fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_dsize); 1134 buf->f_bfree = ufs_blkstofrags(fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_cstotal.cs_nbfree)) + 1135 fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_cstotal.cs_nffree); 1136 buf->f_ffree = fs64_to_cpu(sb, 1137 usb->fs_u11.fs_u2.fs_cstotal.cs_nifree); 1138 } 1139 else { 1140 buf->f_type = UFS_MAGIC; 1141 buf->f_blocks = uspi->s_dsize; 1142 buf->f_bfree = ufs_blkstofrags(fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree)) + 1143 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree); 1144 buf->f_ffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree); 1145 } 1146 buf->f_bsize = sb->s_blocksize; 1147 buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree)) 1148 ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0; 1149 buf->f_files = uspi->s_ncg * uspi->s_ipg; 1150 buf->f_namelen = UFS_MAXNAMLEN; 1151 1152 unlock_kernel(); 1153 1154 return 0; 1155 } 1156 1157 static kmem_cache_t * ufs_inode_cachep; 1158 1159 static struct inode *ufs_alloc_inode(struct super_block *sb) 1160 { 1161 struct ufs_inode_info *ei; 1162 ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, SLAB_KERNEL); 1163 if (!ei) 1164 return NULL; 1165 ei->vfs_inode.i_version = 1; 1166 return &ei->vfs_inode; 1167 } 1168 1169 static void ufs_destroy_inode(struct inode *inode) 1170 { 1171 kmem_cache_free(ufs_inode_cachep, UFS_I(inode)); 1172 } 1173 1174 static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags) 1175 { 1176 struct ufs_inode_info *ei = (struct ufs_inode_info *) foo; 1177 1178 if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) == 1179 SLAB_CTOR_CONSTRUCTOR) 1180 inode_init_once(&ei->vfs_inode); 1181 } 1182 1183 static int init_inodecache(void) 1184 { 1185 ufs_inode_cachep = kmem_cache_create("ufs_inode_cache", 1186 sizeof(struct ufs_inode_info), 1187 0, (SLAB_RECLAIM_ACCOUNT| 1188 SLAB_MEM_SPREAD), 1189 init_once, NULL); 1190 if (ufs_inode_cachep == NULL) 1191 return -ENOMEM; 1192 return 0; 1193 } 1194 1195 static void destroy_inodecache(void) 1196 { 1197 if (kmem_cache_destroy(ufs_inode_cachep)) 1198 printk(KERN_INFO "ufs_inode_cache: not all structures were freed\n"); 1199 } 1200 1201 #ifdef CONFIG_QUOTA 1202 static ssize_t ufs_quota_read(struct super_block *, int, char *,size_t, loff_t); 1203 static ssize_t ufs_quota_write(struct super_block *, int, const char *, size_t, loff_t); 1204 #endif 1205 1206 static struct super_operations ufs_super_ops = { 1207 .alloc_inode = ufs_alloc_inode, 1208 .destroy_inode = ufs_destroy_inode, 1209 .read_inode = ufs_read_inode, 1210 .write_inode = ufs_write_inode, 1211 .delete_inode = ufs_delete_inode, 1212 .put_super = ufs_put_super, 1213 .write_super = ufs_write_super, 1214 .statfs = ufs_statfs, 1215 .remount_fs = ufs_remount, 1216 #ifdef CONFIG_QUOTA 1217 .quota_read = ufs_quota_read, 1218 .quota_write = ufs_quota_write, 1219 #endif 1220 }; 1221 1222 #ifdef CONFIG_QUOTA 1223 1224 /* Read data from quotafile - avoid pagecache and such because we cannot afford 1225 * acquiring the locks... As quota files are never truncated and quota code 1226 * itself serializes the operations (and noone else should touch the files) 1227 * we don't have to be afraid of races */ 1228 static ssize_t ufs_quota_read(struct super_block *sb, int type, char *data, 1229 size_t len, loff_t off) 1230 { 1231 struct inode *inode = sb_dqopt(sb)->files[type]; 1232 sector_t blk = off >> sb->s_blocksize_bits; 1233 int err = 0; 1234 int offset = off & (sb->s_blocksize - 1); 1235 int tocopy; 1236 size_t toread; 1237 struct buffer_head *bh; 1238 loff_t i_size = i_size_read(inode); 1239 1240 if (off > i_size) 1241 return 0; 1242 if (off+len > i_size) 1243 len = i_size-off; 1244 toread = len; 1245 while (toread > 0) { 1246 tocopy = sb->s_blocksize - offset < toread ? 1247 sb->s_blocksize - offset : toread; 1248 1249 bh = ufs_bread(inode, blk, 0, &err); 1250 if (err) 1251 return err; 1252 if (!bh) /* A hole? */ 1253 memset(data, 0, tocopy); 1254 else { 1255 memcpy(data, bh->b_data+offset, tocopy); 1256 brelse(bh); 1257 } 1258 offset = 0; 1259 toread -= tocopy; 1260 data += tocopy; 1261 blk++; 1262 } 1263 return len; 1264 } 1265 1266 /* Write to quotafile */ 1267 static ssize_t ufs_quota_write(struct super_block *sb, int type, 1268 const char *data, size_t len, loff_t off) 1269 { 1270 struct inode *inode = sb_dqopt(sb)->files[type]; 1271 sector_t blk = off >> sb->s_blocksize_bits; 1272 int err = 0; 1273 int offset = off & (sb->s_blocksize - 1); 1274 int tocopy; 1275 size_t towrite = len; 1276 struct buffer_head *bh; 1277 1278 mutex_lock(&inode->i_mutex); 1279 while (towrite > 0) { 1280 tocopy = sb->s_blocksize - offset < towrite ? 1281 sb->s_blocksize - offset : towrite; 1282 1283 bh = ufs_bread(inode, blk, 1, &err); 1284 if (!bh) 1285 goto out; 1286 lock_buffer(bh); 1287 memcpy(bh->b_data+offset, data, tocopy); 1288 flush_dcache_page(bh->b_page); 1289 set_buffer_uptodate(bh); 1290 mark_buffer_dirty(bh); 1291 unlock_buffer(bh); 1292 brelse(bh); 1293 offset = 0; 1294 towrite -= tocopy; 1295 data += tocopy; 1296 blk++; 1297 } 1298 out: 1299 if (len == towrite) { 1300 mutex_unlock(&inode->i_mutex); 1301 return err; 1302 } 1303 if (inode->i_size < off+len-towrite) 1304 i_size_write(inode, off+len-towrite); 1305 inode->i_version++; 1306 inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC; 1307 mark_inode_dirty(inode); 1308 mutex_unlock(&inode->i_mutex); 1309 return len - towrite; 1310 } 1311 1312 #endif 1313 1314 static struct super_block *ufs_get_sb(struct file_system_type *fs_type, 1315 int flags, const char *dev_name, void *data) 1316 { 1317 return get_sb_bdev(fs_type, flags, dev_name, data, ufs_fill_super); 1318 } 1319 1320 static struct file_system_type ufs_fs_type = { 1321 .owner = THIS_MODULE, 1322 .name = "ufs", 1323 .get_sb = ufs_get_sb, 1324 .kill_sb = kill_block_super, 1325 .fs_flags = FS_REQUIRES_DEV, 1326 }; 1327 1328 static int __init init_ufs_fs(void) 1329 { 1330 int err = init_inodecache(); 1331 if (err) 1332 goto out1; 1333 err = register_filesystem(&ufs_fs_type); 1334 if (err) 1335 goto out; 1336 return 0; 1337 out: 1338 destroy_inodecache(); 1339 out1: 1340 return err; 1341 } 1342 1343 static void __exit exit_ufs_fs(void) 1344 { 1345 unregister_filesystem(&ufs_fs_type); 1346 destroy_inodecache(); 1347 } 1348 1349 module_init(init_ufs_fs) 1350 module_exit(exit_ufs_fs) 1351 MODULE_LICENSE("GPL"); 1352