1 /* 2 * linux/fs/ufs/inode.c 3 * 4 * Copyright (C) 1998 5 * Daniel Pirkl <daniel.pirkl@email.cz> 6 * Charles University, Faculty of Mathematics and Physics 7 * 8 * from 9 * 10 * linux/fs/ext2/inode.c 11 * 12 * Copyright (C) 1992, 1993, 1994, 1995 13 * Remy Card (card@masi.ibp.fr) 14 * Laboratoire MASI - Institut Blaise Pascal 15 * Universite Pierre et Marie Curie (Paris VI) 16 * 17 * from 18 * 19 * linux/fs/minix/inode.c 20 * 21 * Copyright (C) 1991, 1992 Linus Torvalds 22 * 23 * Goal-directed block allocation by Stephen Tweedie (sct@dcs.ed.ac.uk), 1993 24 * Big-endian to little-endian byte-swapping/bitmaps by 25 * David S. Miller (davem@caip.rutgers.edu), 1995 26 */ 27 28 #include <asm/uaccess.h> 29 #include <asm/system.h> 30 31 #include <linux/errno.h> 32 #include <linux/fs.h> 33 #include <linux/time.h> 34 #include <linux/stat.h> 35 #include <linux/string.h> 36 #include <linux/mm.h> 37 #include <linux/smp_lock.h> 38 #include <linux/buffer_head.h> 39 40 #include "ufs_fs.h" 41 #include "ufs.h" 42 #include "swab.h" 43 #include "util.h" 44 45 static u64 ufs_frag_map(struct inode *inode, sector_t frag); 46 47 static int ufs_block_to_path(struct inode *inode, sector_t i_block, sector_t offsets[4]) 48 { 49 struct ufs_sb_private_info *uspi = UFS_SB(inode->i_sb)->s_uspi; 50 int ptrs = uspi->s_apb; 51 int ptrs_bits = uspi->s_apbshift; 52 const long direct_blocks = UFS_NDADDR, 53 indirect_blocks = ptrs, 54 double_blocks = (1 << (ptrs_bits * 2)); 55 int n = 0; 56 57 58 UFSD("ptrs=uspi->s_apb = %d,double_blocks=%ld \n",ptrs,double_blocks); 59 if (i_block < 0) { 60 ufs_warning(inode->i_sb, "ufs_block_to_path", "block < 0"); 61 } else if (i_block < direct_blocks) { 62 offsets[n++] = i_block; 63 } else if ((i_block -= direct_blocks) < indirect_blocks) { 64 offsets[n++] = UFS_IND_BLOCK; 65 offsets[n++] = i_block; 66 } else if ((i_block -= indirect_blocks) < double_blocks) { 67 offsets[n++] = UFS_DIND_BLOCK; 68 offsets[n++] = i_block >> ptrs_bits; 69 offsets[n++] = i_block & (ptrs - 1); 70 } else if (((i_block -= double_blocks) >> (ptrs_bits * 2)) < ptrs) { 71 offsets[n++] = UFS_TIND_BLOCK; 72 offsets[n++] = i_block >> (ptrs_bits * 2); 73 offsets[n++] = (i_block >> ptrs_bits) & (ptrs - 1); 74 offsets[n++] = i_block & (ptrs - 1); 75 } else { 76 ufs_warning(inode->i_sb, "ufs_block_to_path", "block > big"); 77 } 78 return n; 79 } 80 81 /* 82 * Returns the location of the fragment from 83 * the begining of the filesystem. 84 */ 85 86 static u64 ufs_frag_map(struct inode *inode, sector_t frag) 87 { 88 struct ufs_inode_info *ufsi = UFS_I(inode); 89 struct super_block *sb = inode->i_sb; 90 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 91 u64 mask = (u64) uspi->s_apbmask>>uspi->s_fpbshift; 92 int shift = uspi->s_apbshift-uspi->s_fpbshift; 93 sector_t offsets[4], *p; 94 int depth = ufs_block_to_path(inode, frag >> uspi->s_fpbshift, offsets); 95 u64 ret = 0L; 96 __fs32 block; 97 __fs64 u2_block = 0L; 98 unsigned flags = UFS_SB(sb)->s_flags; 99 u64 temp = 0L; 100 101 UFSD(": frag = %llu depth = %d\n", (unsigned long long)frag, depth); 102 UFSD(": uspi->s_fpbshift = %d ,uspi->s_apbmask = %x, mask=%llx\n", 103 uspi->s_fpbshift, uspi->s_apbmask, 104 (unsigned long long)mask); 105 106 if (depth == 0) 107 return 0; 108 109 p = offsets; 110 111 lock_kernel(); 112 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) 113 goto ufs2; 114 115 block = ufsi->i_u1.i_data[*p++]; 116 if (!block) 117 goto out; 118 while (--depth) { 119 struct buffer_head *bh; 120 sector_t n = *p++; 121 122 bh = sb_bread(sb, uspi->s_sbbase + fs32_to_cpu(sb, block)+(n>>shift)); 123 if (!bh) 124 goto out; 125 block = ((__fs32 *) bh->b_data)[n & mask]; 126 brelse (bh); 127 if (!block) 128 goto out; 129 } 130 ret = (u64) (uspi->s_sbbase + fs32_to_cpu(sb, block) + (frag & uspi->s_fpbmask)); 131 goto out; 132 ufs2: 133 u2_block = ufsi->i_u1.u2_i_data[*p++]; 134 if (!u2_block) 135 goto out; 136 137 138 while (--depth) { 139 struct buffer_head *bh; 140 sector_t n = *p++; 141 142 143 temp = (u64)(uspi->s_sbbase) + fs64_to_cpu(sb, u2_block); 144 bh = sb_bread(sb, temp +(u64) (n>>shift)); 145 if (!bh) 146 goto out; 147 u2_block = ((__fs64 *)bh->b_data)[n & mask]; 148 brelse(bh); 149 if (!u2_block) 150 goto out; 151 } 152 temp = (u64)uspi->s_sbbase + fs64_to_cpu(sb, u2_block); 153 ret = temp + (u64) (frag & uspi->s_fpbmask); 154 155 out: 156 unlock_kernel(); 157 return ret; 158 } 159 160 /** 161 * ufs_inode_getfrag() - allocate new fragment(s) 162 * @inode - pointer to inode 163 * @fragment - number of `fragment' which hold pointer 164 * to new allocated fragment(s) 165 * @new_fragment - number of new allocated fragment(s) 166 * @required - how many fragment(s) we require 167 * @err - we set it if something wrong 168 * @phys - pointer to where we save physical number of new allocated fragments, 169 * NULL if we allocate not data(indirect blocks for example). 170 * @new - we set it if we allocate new block 171 * @locked_page - for ufs_new_fragments() 172 */ 173 static struct buffer_head * 174 ufs_inode_getfrag(struct inode *inode, u64 fragment, 175 sector_t new_fragment, unsigned int required, int *err, 176 long *phys, int *new, struct page *locked_page) 177 { 178 struct ufs_inode_info *ufsi = UFS_I(inode); 179 struct super_block *sb = inode->i_sb; 180 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 181 struct buffer_head * result; 182 unsigned blockoff, lastblockoff; 183 u64 tmp, goal, lastfrag, block, lastblock; 184 void *p, *p2; 185 186 UFSD("ENTER, ino %lu, fragment %llu, new_fragment %llu, required %u, " 187 "metadata %d\n", inode->i_ino, (unsigned long long)fragment, 188 (unsigned long long)new_fragment, required, !phys); 189 190 /* TODO : to be done for write support 191 if ( (flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) 192 goto ufs2; 193 */ 194 195 block = ufs_fragstoblks (fragment); 196 blockoff = ufs_fragnum (fragment); 197 p = ufs_get_direct_data_ptr(uspi, ufsi, block); 198 199 goal = 0; 200 201 repeat: 202 tmp = ufs_data_ptr_to_cpu(sb, p); 203 204 lastfrag = ufsi->i_lastfrag; 205 if (tmp && fragment < lastfrag) { 206 if (!phys) { 207 result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff); 208 if (tmp == ufs_data_ptr_to_cpu(sb, p)) { 209 UFSD("EXIT, result %llu\n", 210 (unsigned long long)tmp + blockoff); 211 return result; 212 } 213 brelse (result); 214 goto repeat; 215 } else { 216 *phys = uspi->s_sbbase + tmp + blockoff; 217 return NULL; 218 } 219 } 220 221 lastblock = ufs_fragstoblks (lastfrag); 222 lastblockoff = ufs_fragnum (lastfrag); 223 /* 224 * We will extend file into new block beyond last allocated block 225 */ 226 if (lastblock < block) { 227 /* 228 * We must reallocate last allocated block 229 */ 230 if (lastblockoff) { 231 p2 = ufs_get_direct_data_ptr(uspi, ufsi, lastblock); 232 tmp = ufs_new_fragments(inode, p2, lastfrag, 233 ufs_data_ptr_to_cpu(sb, p2), 234 uspi->s_fpb - lastblockoff, 235 err, locked_page); 236 if (!tmp) { 237 if (lastfrag != ufsi->i_lastfrag) 238 goto repeat; 239 else 240 return NULL; 241 } 242 lastfrag = ufsi->i_lastfrag; 243 244 } 245 tmp = ufs_data_ptr_to_cpu(sb, 246 ufs_get_direct_data_ptr(uspi, ufsi, 247 lastblock)); 248 if (tmp) 249 goal = tmp + uspi->s_fpb; 250 tmp = ufs_new_fragments (inode, p, fragment - blockoff, 251 goal, required + blockoff, 252 err, 253 phys != NULL ? locked_page : NULL); 254 } else if (lastblock == block) { 255 /* 256 * We will extend last allocated block 257 */ 258 tmp = ufs_new_fragments(inode, p, fragment - 259 (blockoff - lastblockoff), 260 ufs_data_ptr_to_cpu(sb, p), 261 required + (blockoff - lastblockoff), 262 err, phys != NULL ? locked_page : NULL); 263 } else /* (lastblock > block) */ { 264 /* 265 * We will allocate new block before last allocated block 266 */ 267 if (block) { 268 tmp = ufs_data_ptr_to_cpu(sb, 269 ufs_get_direct_data_ptr(uspi, ufsi, block - 1)); 270 if (tmp) 271 goal = tmp + uspi->s_fpb; 272 } 273 tmp = ufs_new_fragments(inode, p, fragment - blockoff, 274 goal, uspi->s_fpb, err, 275 phys != NULL ? locked_page : NULL); 276 } 277 if (!tmp) { 278 if ((!blockoff && ufs_data_ptr_to_cpu(sb, p)) || 279 (blockoff && lastfrag != ufsi->i_lastfrag)) 280 goto repeat; 281 *err = -ENOSPC; 282 return NULL; 283 } 284 285 if (!phys) { 286 result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff); 287 } else { 288 *phys = uspi->s_sbbase + tmp + blockoff; 289 result = NULL; 290 *err = 0; 291 *new = 1; 292 } 293 294 inode->i_ctime = CURRENT_TIME_SEC; 295 if (IS_SYNC(inode)) 296 ufs_sync_inode (inode); 297 mark_inode_dirty(inode); 298 UFSD("EXIT, result %llu\n", (unsigned long long)tmp + blockoff); 299 return result; 300 301 /* This part : To be implemented .... 302 Required only for writing, not required for READ-ONLY. 303 ufs2: 304 305 u2_block = ufs_fragstoblks(fragment); 306 u2_blockoff = ufs_fragnum(fragment); 307 p = ufsi->i_u1.u2_i_data + block; 308 goal = 0; 309 310 repeat2: 311 tmp = fs32_to_cpu(sb, *p); 312 lastfrag = ufsi->i_lastfrag; 313 314 */ 315 } 316 317 /** 318 * ufs_inode_getblock() - allocate new block 319 * @inode - pointer to inode 320 * @bh - pointer to block which hold "pointer" to new allocated block 321 * @fragment - number of `fragment' which hold pointer 322 * to new allocated block 323 * @new_fragment - number of new allocated fragment 324 * (block will hold this fragment and also uspi->s_fpb-1) 325 * @err - see ufs_inode_getfrag() 326 * @phys - see ufs_inode_getfrag() 327 * @new - see ufs_inode_getfrag() 328 * @locked_page - see ufs_inode_getfrag() 329 */ 330 static struct buffer_head * 331 ufs_inode_getblock(struct inode *inode, struct buffer_head *bh, 332 u64 fragment, sector_t new_fragment, int *err, 333 long *phys, int *new, struct page *locked_page) 334 { 335 struct super_block *sb = inode->i_sb; 336 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 337 struct buffer_head * result; 338 unsigned blockoff; 339 u64 tmp, goal, block; 340 void *p; 341 342 block = ufs_fragstoblks (fragment); 343 blockoff = ufs_fragnum (fragment); 344 345 UFSD("ENTER, ino %lu, fragment %llu, new_fragment %llu, metadata %d\n", 346 inode->i_ino, (unsigned long long)fragment, 347 (unsigned long long)new_fragment, !phys); 348 349 result = NULL; 350 if (!bh) 351 goto out; 352 if (!buffer_uptodate(bh)) { 353 ll_rw_block (READ, 1, &bh); 354 wait_on_buffer (bh); 355 if (!buffer_uptodate(bh)) 356 goto out; 357 } 358 if (uspi->fs_magic == UFS2_MAGIC) 359 p = (__fs64 *)bh->b_data + block; 360 else 361 p = (__fs32 *)bh->b_data + block; 362 repeat: 363 tmp = ufs_data_ptr_to_cpu(sb, p); 364 if (tmp) { 365 if (!phys) { 366 result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff); 367 if (tmp == ufs_data_ptr_to_cpu(sb, p)) 368 goto out; 369 brelse (result); 370 goto repeat; 371 } else { 372 *phys = uspi->s_sbbase + tmp + blockoff; 373 goto out; 374 } 375 } 376 377 if (block && (uspi->fs_magic == UFS2_MAGIC ? 378 (tmp = fs64_to_cpu(sb, ((__fs64 *)bh->b_data)[block-1])) : 379 (tmp = fs32_to_cpu(sb, ((__fs32 *)bh->b_data)[block-1])))) 380 goal = tmp + uspi->s_fpb; 381 else 382 goal = bh->b_blocknr + uspi->s_fpb; 383 tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment), goal, 384 uspi->s_fpb, err, locked_page); 385 if (!tmp) { 386 if (ufs_data_ptr_to_cpu(sb, p)) 387 goto repeat; 388 goto out; 389 } 390 391 392 if (!phys) { 393 result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff); 394 } else { 395 *phys = uspi->s_sbbase + tmp + blockoff; 396 *new = 1; 397 } 398 399 mark_buffer_dirty(bh); 400 if (IS_SYNC(inode)) 401 sync_dirty_buffer(bh); 402 inode->i_ctime = CURRENT_TIME_SEC; 403 mark_inode_dirty(inode); 404 UFSD("result %llu\n", (unsigned long long)tmp + blockoff); 405 out: 406 brelse (bh); 407 UFSD("EXIT\n"); 408 return result; 409 } 410 411 /** 412 * ufs_getfrag_bloc() - `get_block_t' function, interface between UFS and 413 * readpage, writepage and so on 414 */ 415 416 int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create) 417 { 418 struct super_block * sb = inode->i_sb; 419 struct ufs_sb_private_info * uspi = UFS_SB(sb)->s_uspi; 420 struct buffer_head * bh; 421 int ret, err, new; 422 unsigned long ptr,phys; 423 u64 phys64 = 0; 424 425 if (!create) { 426 phys64 = ufs_frag_map(inode, fragment); 427 UFSD("phys64 = %llu\n", (unsigned long long)phys64); 428 if (phys64) 429 map_bh(bh_result, sb, phys64); 430 return 0; 431 } 432 433 /* This code entered only while writing ....? */ 434 435 err = -EIO; 436 new = 0; 437 ret = 0; 438 bh = NULL; 439 440 lock_kernel(); 441 442 UFSD("ENTER, ino %lu, fragment %llu\n", inode->i_ino, (unsigned long long)fragment); 443 if (fragment < 0) 444 goto abort_negative; 445 if (fragment > 446 ((UFS_NDADDR + uspi->s_apb + uspi->s_2apb + uspi->s_3apb) 447 << uspi->s_fpbshift)) 448 goto abort_too_big; 449 450 err = 0; 451 ptr = fragment; 452 453 /* 454 * ok, these macros clean the logic up a bit and make 455 * it much more readable: 456 */ 457 #define GET_INODE_DATABLOCK(x) \ 458 ufs_inode_getfrag(inode, x, fragment, 1, &err, &phys, &new,\ 459 bh_result->b_page) 460 #define GET_INODE_PTR(x) \ 461 ufs_inode_getfrag(inode, x, fragment, uspi->s_fpb, &err, NULL, NULL,\ 462 bh_result->b_page) 463 #define GET_INDIRECT_DATABLOCK(x) \ 464 ufs_inode_getblock(inode, bh, x, fragment, \ 465 &err, &phys, &new, bh_result->b_page) 466 #define GET_INDIRECT_PTR(x) \ 467 ufs_inode_getblock(inode, bh, x, fragment, \ 468 &err, NULL, NULL, NULL) 469 470 if (ptr < UFS_NDIR_FRAGMENT) { 471 bh = GET_INODE_DATABLOCK(ptr); 472 goto out; 473 } 474 ptr -= UFS_NDIR_FRAGMENT; 475 if (ptr < (1 << (uspi->s_apbshift + uspi->s_fpbshift))) { 476 bh = GET_INODE_PTR(UFS_IND_FRAGMENT + (ptr >> uspi->s_apbshift)); 477 goto get_indirect; 478 } 479 ptr -= 1 << (uspi->s_apbshift + uspi->s_fpbshift); 480 if (ptr < (1 << (uspi->s_2apbshift + uspi->s_fpbshift))) { 481 bh = GET_INODE_PTR(UFS_DIND_FRAGMENT + (ptr >> uspi->s_2apbshift)); 482 goto get_double; 483 } 484 ptr -= 1 << (uspi->s_2apbshift + uspi->s_fpbshift); 485 bh = GET_INODE_PTR(UFS_TIND_FRAGMENT + (ptr >> uspi->s_3apbshift)); 486 bh = GET_INDIRECT_PTR((ptr >> uspi->s_2apbshift) & uspi->s_apbmask); 487 get_double: 488 bh = GET_INDIRECT_PTR((ptr >> uspi->s_apbshift) & uspi->s_apbmask); 489 get_indirect: 490 bh = GET_INDIRECT_DATABLOCK(ptr & uspi->s_apbmask); 491 492 #undef GET_INODE_DATABLOCK 493 #undef GET_INODE_PTR 494 #undef GET_INDIRECT_DATABLOCK 495 #undef GET_INDIRECT_PTR 496 497 out: 498 if (err) 499 goto abort; 500 if (new) 501 set_buffer_new(bh_result); 502 map_bh(bh_result, sb, phys); 503 abort: 504 unlock_kernel(); 505 return err; 506 507 abort_negative: 508 ufs_warning(sb, "ufs_get_block", "block < 0"); 509 goto abort; 510 511 abort_too_big: 512 ufs_warning(sb, "ufs_get_block", "block > big"); 513 goto abort; 514 } 515 516 static struct buffer_head *ufs_getfrag(struct inode *inode, 517 unsigned int fragment, 518 int create, int *err) 519 { 520 struct buffer_head dummy; 521 int error; 522 523 dummy.b_state = 0; 524 dummy.b_blocknr = -1000; 525 error = ufs_getfrag_block(inode, fragment, &dummy, create); 526 *err = error; 527 if (!error && buffer_mapped(&dummy)) { 528 struct buffer_head *bh; 529 bh = sb_getblk(inode->i_sb, dummy.b_blocknr); 530 if (buffer_new(&dummy)) { 531 memset(bh->b_data, 0, inode->i_sb->s_blocksize); 532 set_buffer_uptodate(bh); 533 mark_buffer_dirty(bh); 534 } 535 return bh; 536 } 537 return NULL; 538 } 539 540 struct buffer_head * ufs_bread (struct inode * inode, unsigned fragment, 541 int create, int * err) 542 { 543 struct buffer_head * bh; 544 545 UFSD("ENTER, ino %lu, fragment %u\n", inode->i_ino, fragment); 546 bh = ufs_getfrag (inode, fragment, create, err); 547 if (!bh || buffer_uptodate(bh)) 548 return bh; 549 ll_rw_block (READ, 1, &bh); 550 wait_on_buffer (bh); 551 if (buffer_uptodate(bh)) 552 return bh; 553 brelse (bh); 554 *err = -EIO; 555 return NULL; 556 } 557 558 static int ufs_writepage(struct page *page, struct writeback_control *wbc) 559 { 560 return block_write_full_page(page,ufs_getfrag_block,wbc); 561 } 562 563 static int ufs_readpage(struct file *file, struct page *page) 564 { 565 return block_read_full_page(page,ufs_getfrag_block); 566 } 567 568 int __ufs_write_begin(struct file *file, struct address_space *mapping, 569 loff_t pos, unsigned len, unsigned flags, 570 struct page **pagep, void **fsdata) 571 { 572 return block_write_begin(file, mapping, pos, len, flags, pagep, fsdata, 573 ufs_getfrag_block); 574 } 575 576 static int ufs_write_begin(struct file *file, struct address_space *mapping, 577 loff_t pos, unsigned len, unsigned flags, 578 struct page **pagep, void **fsdata) 579 { 580 *pagep = NULL; 581 return __ufs_write_begin(file, mapping, pos, len, flags, pagep, fsdata); 582 } 583 584 static sector_t ufs_bmap(struct address_space *mapping, sector_t block) 585 { 586 return generic_block_bmap(mapping,block,ufs_getfrag_block); 587 } 588 589 const struct address_space_operations ufs_aops = { 590 .readpage = ufs_readpage, 591 .writepage = ufs_writepage, 592 .sync_page = block_sync_page, 593 .write_begin = ufs_write_begin, 594 .write_end = generic_write_end, 595 .bmap = ufs_bmap 596 }; 597 598 static void ufs_set_inode_ops(struct inode *inode) 599 { 600 if (S_ISREG(inode->i_mode)) { 601 inode->i_op = &ufs_file_inode_operations; 602 inode->i_fop = &ufs_file_operations; 603 inode->i_mapping->a_ops = &ufs_aops; 604 } else if (S_ISDIR(inode->i_mode)) { 605 inode->i_op = &ufs_dir_inode_operations; 606 inode->i_fop = &ufs_dir_operations; 607 inode->i_mapping->a_ops = &ufs_aops; 608 } else if (S_ISLNK(inode->i_mode)) { 609 if (!inode->i_blocks) 610 inode->i_op = &ufs_fast_symlink_inode_operations; 611 else { 612 inode->i_op = &page_symlink_inode_operations; 613 inode->i_mapping->a_ops = &ufs_aops; 614 } 615 } else 616 init_special_inode(inode, inode->i_mode, 617 ufs_get_inode_dev(inode->i_sb, UFS_I(inode))); 618 } 619 620 static int ufs1_read_inode(struct inode *inode, struct ufs_inode *ufs_inode) 621 { 622 struct ufs_inode_info *ufsi = UFS_I(inode); 623 struct super_block *sb = inode->i_sb; 624 mode_t mode; 625 626 /* 627 * Copy data to the in-core inode. 628 */ 629 inode->i_mode = mode = fs16_to_cpu(sb, ufs_inode->ui_mode); 630 inode->i_nlink = fs16_to_cpu(sb, ufs_inode->ui_nlink); 631 if (inode->i_nlink == 0) { 632 ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino); 633 return -1; 634 } 635 636 /* 637 * Linux now has 32-bit uid and gid, so we can support EFT. 638 */ 639 inode->i_uid = ufs_get_inode_uid(sb, ufs_inode); 640 inode->i_gid = ufs_get_inode_gid(sb, ufs_inode); 641 642 inode->i_size = fs64_to_cpu(sb, ufs_inode->ui_size); 643 inode->i_atime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_atime.tv_sec); 644 inode->i_ctime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_ctime.tv_sec); 645 inode->i_mtime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_mtime.tv_sec); 646 inode->i_mtime.tv_nsec = 0; 647 inode->i_atime.tv_nsec = 0; 648 inode->i_ctime.tv_nsec = 0; 649 inode->i_blocks = fs32_to_cpu(sb, ufs_inode->ui_blocks); 650 inode->i_generation = fs32_to_cpu(sb, ufs_inode->ui_gen); 651 ufsi->i_flags = fs32_to_cpu(sb, ufs_inode->ui_flags); 652 ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow); 653 ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag); 654 655 656 if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) { 657 memcpy(ufsi->i_u1.i_data, &ufs_inode->ui_u2.ui_addr, 658 sizeof(ufs_inode->ui_u2.ui_addr)); 659 } else { 660 memcpy(ufsi->i_u1.i_symlink, ufs_inode->ui_u2.ui_symlink, 661 sizeof(ufs_inode->ui_u2.ui_symlink)); 662 } 663 return 0; 664 } 665 666 static int ufs2_read_inode(struct inode *inode, struct ufs2_inode *ufs2_inode) 667 { 668 struct ufs_inode_info *ufsi = UFS_I(inode); 669 struct super_block *sb = inode->i_sb; 670 mode_t mode; 671 672 UFSD("Reading ufs2 inode, ino %lu\n", inode->i_ino); 673 /* 674 * Copy data to the in-core inode. 675 */ 676 inode->i_mode = mode = fs16_to_cpu(sb, ufs2_inode->ui_mode); 677 inode->i_nlink = fs16_to_cpu(sb, ufs2_inode->ui_nlink); 678 if (inode->i_nlink == 0) { 679 ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino); 680 return -1; 681 } 682 683 /* 684 * Linux now has 32-bit uid and gid, so we can support EFT. 685 */ 686 inode->i_uid = fs32_to_cpu(sb, ufs2_inode->ui_uid); 687 inode->i_gid = fs32_to_cpu(sb, ufs2_inode->ui_gid); 688 689 inode->i_size = fs64_to_cpu(sb, ufs2_inode->ui_size); 690 inode->i_atime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_atime); 691 inode->i_ctime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_ctime); 692 inode->i_mtime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_mtime); 693 inode->i_atime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_atimensec); 694 inode->i_ctime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_ctimensec); 695 inode->i_mtime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_mtimensec); 696 inode->i_blocks = fs64_to_cpu(sb, ufs2_inode->ui_blocks); 697 inode->i_generation = fs32_to_cpu(sb, ufs2_inode->ui_gen); 698 ufsi->i_flags = fs32_to_cpu(sb, ufs2_inode->ui_flags); 699 /* 700 ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow); 701 ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag); 702 */ 703 704 if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) { 705 memcpy(ufsi->i_u1.u2_i_data, &ufs2_inode->ui_u2.ui_addr, 706 sizeof(ufs2_inode->ui_u2.ui_addr)); 707 } else { 708 memcpy(ufsi->i_u1.i_symlink, ufs2_inode->ui_u2.ui_symlink, 709 sizeof(ufs2_inode->ui_u2.ui_symlink)); 710 } 711 return 0; 712 } 713 714 struct inode *ufs_iget(struct super_block *sb, unsigned long ino) 715 { 716 struct ufs_inode_info *ufsi; 717 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 718 struct buffer_head * bh; 719 struct inode *inode; 720 int err; 721 722 UFSD("ENTER, ino %lu\n", ino); 723 724 if (ino < UFS_ROOTINO || ino > (uspi->s_ncg * uspi->s_ipg)) { 725 ufs_warning(sb, "ufs_read_inode", "bad inode number (%lu)\n", 726 ino); 727 return ERR_PTR(-EIO); 728 } 729 730 inode = iget_locked(sb, ino); 731 if (!inode) 732 return ERR_PTR(-ENOMEM); 733 if (!(inode->i_state & I_NEW)) 734 return inode; 735 736 ufsi = UFS_I(inode); 737 738 bh = sb_bread(sb, uspi->s_sbbase + ufs_inotofsba(inode->i_ino)); 739 if (!bh) { 740 ufs_warning(sb, "ufs_read_inode", "unable to read inode %lu\n", 741 inode->i_ino); 742 goto bad_inode; 743 } 744 if ((UFS_SB(sb)->s_flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { 745 struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data; 746 747 err = ufs2_read_inode(inode, 748 ufs2_inode + ufs_inotofsbo(inode->i_ino)); 749 } else { 750 struct ufs_inode *ufs_inode = (struct ufs_inode *)bh->b_data; 751 752 err = ufs1_read_inode(inode, 753 ufs_inode + ufs_inotofsbo(inode->i_ino)); 754 } 755 756 if (err) 757 goto bad_inode; 758 inode->i_version++; 759 ufsi->i_lastfrag = 760 (inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift; 761 ufsi->i_dir_start_lookup = 0; 762 ufsi->i_osync = 0; 763 764 ufs_set_inode_ops(inode); 765 766 brelse(bh); 767 768 UFSD("EXIT\n"); 769 unlock_new_inode(inode); 770 return inode; 771 772 bad_inode: 773 iget_failed(inode); 774 return ERR_PTR(-EIO); 775 } 776 777 static void ufs1_update_inode(struct inode *inode, struct ufs_inode *ufs_inode) 778 { 779 struct super_block *sb = inode->i_sb; 780 struct ufs_inode_info *ufsi = UFS_I(inode); 781 782 ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode); 783 ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink); 784 785 ufs_set_inode_uid(sb, ufs_inode, inode->i_uid); 786 ufs_set_inode_gid(sb, ufs_inode, inode->i_gid); 787 788 ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size); 789 ufs_inode->ui_atime.tv_sec = cpu_to_fs32(sb, inode->i_atime.tv_sec); 790 ufs_inode->ui_atime.tv_usec = 0; 791 ufs_inode->ui_ctime.tv_sec = cpu_to_fs32(sb, inode->i_ctime.tv_sec); 792 ufs_inode->ui_ctime.tv_usec = 0; 793 ufs_inode->ui_mtime.tv_sec = cpu_to_fs32(sb, inode->i_mtime.tv_sec); 794 ufs_inode->ui_mtime.tv_usec = 0; 795 ufs_inode->ui_blocks = cpu_to_fs32(sb, inode->i_blocks); 796 ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags); 797 ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation); 798 799 if ((UFS_SB(sb)->s_flags & UFS_UID_MASK) == UFS_UID_EFT) { 800 ufs_inode->ui_u3.ui_sun.ui_shadow = cpu_to_fs32(sb, ufsi->i_shadow); 801 ufs_inode->ui_u3.ui_sun.ui_oeftflag = cpu_to_fs32(sb, ufsi->i_oeftflag); 802 } 803 804 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { 805 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */ 806 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.i_data[0]; 807 } else if (inode->i_blocks) { 808 memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.i_data, 809 sizeof(ufs_inode->ui_u2.ui_addr)); 810 } 811 else { 812 memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink, 813 sizeof(ufs_inode->ui_u2.ui_symlink)); 814 } 815 816 if (!inode->i_nlink) 817 memset (ufs_inode, 0, sizeof(struct ufs_inode)); 818 } 819 820 static void ufs2_update_inode(struct inode *inode, struct ufs2_inode *ufs_inode) 821 { 822 struct super_block *sb = inode->i_sb; 823 struct ufs_inode_info *ufsi = UFS_I(inode); 824 825 UFSD("ENTER\n"); 826 ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode); 827 ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink); 828 829 ufs_inode->ui_uid = cpu_to_fs32(sb, inode->i_uid); 830 ufs_inode->ui_gid = cpu_to_fs32(sb, inode->i_gid); 831 832 ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size); 833 ufs_inode->ui_atime = cpu_to_fs64(sb, inode->i_atime.tv_sec); 834 ufs_inode->ui_atimensec = cpu_to_fs32(sb, inode->i_atime.tv_nsec); 835 ufs_inode->ui_ctime = cpu_to_fs64(sb, inode->i_ctime.tv_sec); 836 ufs_inode->ui_ctimensec = cpu_to_fs32(sb, inode->i_ctime.tv_nsec); 837 ufs_inode->ui_mtime = cpu_to_fs64(sb, inode->i_mtime.tv_sec); 838 ufs_inode->ui_mtimensec = cpu_to_fs32(sb, inode->i_mtime.tv_nsec); 839 840 ufs_inode->ui_blocks = cpu_to_fs64(sb, inode->i_blocks); 841 ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags); 842 ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation); 843 844 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { 845 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */ 846 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.u2_i_data[0]; 847 } else if (inode->i_blocks) { 848 memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.u2_i_data, 849 sizeof(ufs_inode->ui_u2.ui_addr)); 850 } else { 851 memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink, 852 sizeof(ufs_inode->ui_u2.ui_symlink)); 853 } 854 855 if (!inode->i_nlink) 856 memset (ufs_inode, 0, sizeof(struct ufs2_inode)); 857 UFSD("EXIT\n"); 858 } 859 860 static int ufs_update_inode(struct inode * inode, int do_sync) 861 { 862 struct super_block *sb = inode->i_sb; 863 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 864 struct buffer_head * bh; 865 866 UFSD("ENTER, ino %lu\n", inode->i_ino); 867 868 if (inode->i_ino < UFS_ROOTINO || 869 inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) { 870 ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino); 871 return -1; 872 } 873 874 bh = sb_bread(sb, ufs_inotofsba(inode->i_ino)); 875 if (!bh) { 876 ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino); 877 return -1; 878 } 879 if (uspi->fs_magic == UFS2_MAGIC) { 880 struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data; 881 882 ufs2_update_inode(inode, 883 ufs2_inode + ufs_inotofsbo(inode->i_ino)); 884 } else { 885 struct ufs_inode *ufs_inode = (struct ufs_inode *) bh->b_data; 886 887 ufs1_update_inode(inode, ufs_inode + ufs_inotofsbo(inode->i_ino)); 888 } 889 890 mark_buffer_dirty(bh); 891 if (do_sync) 892 sync_dirty_buffer(bh); 893 brelse (bh); 894 895 UFSD("EXIT\n"); 896 return 0; 897 } 898 899 int ufs_write_inode (struct inode * inode, int wait) 900 { 901 int ret; 902 lock_kernel(); 903 ret = ufs_update_inode (inode, wait); 904 unlock_kernel(); 905 return ret; 906 } 907 908 int ufs_sync_inode (struct inode *inode) 909 { 910 return ufs_update_inode (inode, 1); 911 } 912 913 void ufs_delete_inode (struct inode * inode) 914 { 915 loff_t old_i_size; 916 917 truncate_inode_pages(&inode->i_data, 0); 918 if (is_bad_inode(inode)) 919 goto no_delete; 920 /*UFS_I(inode)->i_dtime = CURRENT_TIME;*/ 921 lock_kernel(); 922 mark_inode_dirty(inode); 923 ufs_update_inode(inode, IS_SYNC(inode)); 924 old_i_size = inode->i_size; 925 inode->i_size = 0; 926 if (inode->i_blocks && ufs_truncate(inode, old_i_size)) 927 ufs_warning(inode->i_sb, __func__, "ufs_truncate failed\n"); 928 ufs_free_inode (inode); 929 unlock_kernel(); 930 return; 931 no_delete: 932 clear_inode(inode); /* We must guarantee clearing of inode... */ 933 } 934