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/ufs_fs.h> 34 #include <linux/time.h> 35 #include <linux/stat.h> 36 #include <linux/string.h> 37 #include <linux/mm.h> 38 #include <linux/smp_lock.h> 39 #include <linux/buffer_head.h> 40 41 #include "swab.h" 42 #include "util.h" 43 44 static int ufs_block_to_path(struct inode *inode, sector_t i_block, sector_t offsets[4]) 45 { 46 struct ufs_sb_private_info *uspi = UFS_SB(inode->i_sb)->s_uspi; 47 int ptrs = uspi->s_apb; 48 int ptrs_bits = uspi->s_apbshift; 49 const long direct_blocks = UFS_NDADDR, 50 indirect_blocks = ptrs, 51 double_blocks = (1 << (ptrs_bits * 2)); 52 int n = 0; 53 54 55 UFSD("ptrs=uspi->s_apb = %d,double_blocks=%ld \n",ptrs,double_blocks); 56 if (i_block < 0) { 57 ufs_warning(inode->i_sb, "ufs_block_to_path", "block < 0"); 58 } else if (i_block < direct_blocks) { 59 offsets[n++] = i_block; 60 } else if ((i_block -= direct_blocks) < indirect_blocks) { 61 offsets[n++] = UFS_IND_BLOCK; 62 offsets[n++] = i_block; 63 } else if ((i_block -= indirect_blocks) < double_blocks) { 64 offsets[n++] = UFS_DIND_BLOCK; 65 offsets[n++] = i_block >> ptrs_bits; 66 offsets[n++] = i_block & (ptrs - 1); 67 } else if (((i_block -= double_blocks) >> (ptrs_bits * 2)) < ptrs) { 68 offsets[n++] = UFS_TIND_BLOCK; 69 offsets[n++] = i_block >> (ptrs_bits * 2); 70 offsets[n++] = (i_block >> ptrs_bits) & (ptrs - 1); 71 offsets[n++] = i_block & (ptrs - 1); 72 } else { 73 ufs_warning(inode->i_sb, "ufs_block_to_path", "block > big"); 74 } 75 return n; 76 } 77 78 /* 79 * Returns the location of the fragment from 80 * the begining of the filesystem. 81 */ 82 83 u64 ufs_frag_map(struct inode *inode, sector_t frag) 84 { 85 struct ufs_inode_info *ufsi = UFS_I(inode); 86 struct super_block *sb = inode->i_sb; 87 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 88 u64 mask = (u64) uspi->s_apbmask>>uspi->s_fpbshift; 89 int shift = uspi->s_apbshift-uspi->s_fpbshift; 90 sector_t offsets[4], *p; 91 int depth = ufs_block_to_path(inode, frag >> uspi->s_fpbshift, offsets); 92 u64 ret = 0L; 93 __fs32 block; 94 __fs64 u2_block = 0L; 95 unsigned flags = UFS_SB(sb)->s_flags; 96 u64 temp = 0L; 97 98 UFSD(": frag = %llu depth = %d\n", (unsigned long long)frag, depth); 99 UFSD(": uspi->s_fpbshift = %d ,uspi->s_apbmask = %x, mask=%llx\n",uspi->s_fpbshift,uspi->s_apbmask,mask); 100 101 if (depth == 0) 102 return 0; 103 104 p = offsets; 105 106 lock_kernel(); 107 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) 108 goto ufs2; 109 110 block = ufsi->i_u1.i_data[*p++]; 111 if (!block) 112 goto out; 113 while (--depth) { 114 struct buffer_head *bh; 115 sector_t n = *p++; 116 117 bh = sb_bread(sb, uspi->s_sbbase + fs32_to_cpu(sb, block)+(n>>shift)); 118 if (!bh) 119 goto out; 120 block = ((__fs32 *) bh->b_data)[n & mask]; 121 brelse (bh); 122 if (!block) 123 goto out; 124 } 125 ret = (u64) (uspi->s_sbbase + fs32_to_cpu(sb, block) + (frag & uspi->s_fpbmask)); 126 goto out; 127 ufs2: 128 u2_block = ufsi->i_u1.u2_i_data[*p++]; 129 if (!u2_block) 130 goto out; 131 132 133 while (--depth) { 134 struct buffer_head *bh; 135 sector_t n = *p++; 136 137 138 temp = (u64)(uspi->s_sbbase) + fs64_to_cpu(sb, u2_block); 139 bh = sb_bread(sb, temp +(u64) (n>>shift)); 140 if (!bh) 141 goto out; 142 u2_block = ((__fs64 *)bh->b_data)[n & mask]; 143 brelse(bh); 144 if (!u2_block) 145 goto out; 146 } 147 temp = (u64)uspi->s_sbbase + fs64_to_cpu(sb, u2_block); 148 ret = temp + (u64) (frag & uspi->s_fpbmask); 149 150 out: 151 unlock_kernel(); 152 return ret; 153 } 154 155 static void ufs_clear_frag(struct inode *inode, struct buffer_head *bh) 156 { 157 lock_buffer(bh); 158 memset(bh->b_data, 0, inode->i_sb->s_blocksize); 159 set_buffer_uptodate(bh); 160 mark_buffer_dirty(bh); 161 unlock_buffer(bh); 162 if (IS_SYNC(inode)) 163 sync_dirty_buffer(bh); 164 } 165 166 static struct buffer_head * 167 ufs_clear_frags(struct inode *inode, sector_t beg, 168 unsigned int n) 169 { 170 struct buffer_head *res, *bh; 171 sector_t end = beg + n; 172 173 res = sb_getblk(inode->i_sb, beg); 174 ufs_clear_frag(inode, res); 175 for (++beg; beg < end; ++beg) { 176 bh = sb_getblk(inode->i_sb, beg); 177 ufs_clear_frag(inode, bh); 178 brelse(bh); 179 } 180 return res; 181 } 182 183 /** 184 * ufs_inode_getfrag() - allocate new fragment(s) 185 * @inode - pointer to inode 186 * @fragment - number of `fragment' which hold pointer 187 * to new allocated fragment(s) 188 * @new_fragment - number of new allocated fragment(s) 189 * @required - how many fragment(s) we require 190 * @err - we set it if something wrong 191 * @phys - pointer to where we save physical number of new allocated fragments, 192 * NULL if we allocate not data(indirect blocks for example). 193 * @new - we set it if we allocate new block 194 * @locked_page - for ufs_new_fragments() 195 */ 196 static struct buffer_head * 197 ufs_inode_getfrag(struct inode *inode, unsigned int fragment, 198 sector_t new_fragment, unsigned int required, int *err, 199 long *phys, int *new, struct page *locked_page) 200 { 201 struct ufs_inode_info *ufsi = UFS_I(inode); 202 struct super_block *sb = inode->i_sb; 203 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 204 struct buffer_head * result; 205 unsigned block, blockoff, lastfrag, lastblock, lastblockoff; 206 unsigned tmp, goal; 207 __fs32 * p, * p2; 208 209 UFSD("ENTER, ino %lu, fragment %u, new_fragment %llu, required %u, " 210 "metadata %d\n", inode->i_ino, fragment, 211 (unsigned long long)new_fragment, required, !phys); 212 213 /* TODO : to be done for write support 214 if ( (flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) 215 goto ufs2; 216 */ 217 218 block = ufs_fragstoblks (fragment); 219 blockoff = ufs_fragnum (fragment); 220 p = ufsi->i_u1.i_data + block; 221 goal = 0; 222 223 repeat: 224 tmp = fs32_to_cpu(sb, *p); 225 lastfrag = ufsi->i_lastfrag; 226 if (tmp && fragment < lastfrag) { 227 if (!phys) { 228 result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff); 229 if (tmp == fs32_to_cpu(sb, *p)) { 230 UFSD("EXIT, result %u\n", tmp + blockoff); 231 return result; 232 } 233 brelse (result); 234 goto repeat; 235 } else { 236 *phys = tmp + blockoff; 237 return NULL; 238 } 239 } 240 241 lastblock = ufs_fragstoblks (lastfrag); 242 lastblockoff = ufs_fragnum (lastfrag); 243 /* 244 * We will extend file into new block beyond last allocated block 245 */ 246 if (lastblock < block) { 247 /* 248 * We must reallocate last allocated block 249 */ 250 if (lastblockoff) { 251 p2 = ufsi->i_u1.i_data + lastblock; 252 tmp = ufs_new_fragments (inode, p2, lastfrag, 253 fs32_to_cpu(sb, *p2), uspi->s_fpb - lastblockoff, 254 err, locked_page); 255 if (!tmp) { 256 if (lastfrag != ufsi->i_lastfrag) 257 goto repeat; 258 else 259 return NULL; 260 } 261 lastfrag = ufsi->i_lastfrag; 262 263 } 264 goal = fs32_to_cpu(sb, ufsi->i_u1.i_data[lastblock]) + uspi->s_fpb; 265 tmp = ufs_new_fragments (inode, p, fragment - blockoff, 266 goal, required + blockoff, 267 err, locked_page); 268 } 269 /* 270 * We will extend last allocated block 271 */ 272 else if (lastblock == block) { 273 tmp = ufs_new_fragments(inode, p, fragment - (blockoff - lastblockoff), 274 fs32_to_cpu(sb, *p), required + (blockoff - lastblockoff), 275 err, locked_page); 276 } 277 /* 278 * We will allocate new block before last allocated block 279 */ 280 else /* (lastblock > block) */ { 281 if (lastblock && (tmp = fs32_to_cpu(sb, ufsi->i_u1.i_data[lastblock-1]))) 282 goal = tmp + uspi->s_fpb; 283 tmp = ufs_new_fragments(inode, p, fragment - blockoff, 284 goal, uspi->s_fpb, err, locked_page); 285 } 286 if (!tmp) { 287 if ((!blockoff && *p) || 288 (blockoff && lastfrag != ufsi->i_lastfrag)) 289 goto repeat; 290 *err = -ENOSPC; 291 return NULL; 292 } 293 294 if (!phys) { 295 result = ufs_clear_frags(inode, tmp + blockoff, required); 296 } else { 297 *phys = tmp + blockoff; 298 result = NULL; 299 *err = 0; 300 *new = 1; 301 } 302 303 inode->i_ctime = CURRENT_TIME_SEC; 304 if (IS_SYNC(inode)) 305 ufs_sync_inode (inode); 306 mark_inode_dirty(inode); 307 UFSD("EXIT, result %u\n", tmp + blockoff); 308 return result; 309 310 /* This part : To be implemented .... 311 Required only for writing, not required for READ-ONLY. 312 ufs2: 313 314 u2_block = ufs_fragstoblks(fragment); 315 u2_blockoff = ufs_fragnum(fragment); 316 p = ufsi->i_u1.u2_i_data + block; 317 goal = 0; 318 319 repeat2: 320 tmp = fs32_to_cpu(sb, *p); 321 lastfrag = ufsi->i_lastfrag; 322 323 */ 324 } 325 326 /** 327 * ufs_inode_getblock() - allocate new block 328 * @inode - pointer to inode 329 * @bh - pointer to block which hold "pointer" to new allocated block 330 * @fragment - number of `fragment' which hold pointer 331 * to new allocated block 332 * @new_fragment - number of new allocated fragment 333 * (block will hold this fragment and also uspi->s_fpb-1) 334 * @err - see ufs_inode_getfrag() 335 * @phys - see ufs_inode_getfrag() 336 * @new - see ufs_inode_getfrag() 337 * @locked_page - see ufs_inode_getfrag() 338 */ 339 static struct buffer_head * 340 ufs_inode_getblock(struct inode *inode, struct buffer_head *bh, 341 unsigned int fragment, sector_t new_fragment, int *err, 342 long *phys, int *new, struct page *locked_page) 343 { 344 struct super_block *sb = inode->i_sb; 345 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 346 struct buffer_head * result; 347 unsigned tmp, goal, block, blockoff; 348 __fs32 * p; 349 350 block = ufs_fragstoblks (fragment); 351 blockoff = ufs_fragnum (fragment); 352 353 UFSD("ENTER, ino %lu, fragment %u, new_fragment %llu, metadata %d\n", 354 inode->i_ino, fragment, (unsigned long long)new_fragment, !phys); 355 356 result = NULL; 357 if (!bh) 358 goto out; 359 if (!buffer_uptodate(bh)) { 360 ll_rw_block (READ, 1, &bh); 361 wait_on_buffer (bh); 362 if (!buffer_uptodate(bh)) 363 goto out; 364 } 365 366 p = (__fs32 *) bh->b_data + block; 367 repeat: 368 tmp = fs32_to_cpu(sb, *p); 369 if (tmp) { 370 if (!phys) { 371 result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff); 372 if (tmp == fs32_to_cpu(sb, *p)) 373 goto out; 374 brelse (result); 375 goto repeat; 376 } else { 377 *phys = tmp + blockoff; 378 goto out; 379 } 380 } 381 382 if (block && (tmp = fs32_to_cpu(sb, ((__fs32*)bh->b_data)[block-1]) + uspi->s_fpb)) 383 goal = tmp + uspi->s_fpb; 384 else 385 goal = bh->b_blocknr + uspi->s_fpb; 386 tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment), goal, 387 uspi->s_fpb, err, locked_page); 388 if (!tmp) { 389 if (fs32_to_cpu(sb, *p)) 390 goto repeat; 391 goto out; 392 } 393 394 395 if (!phys) { 396 result = ufs_clear_frags(inode, tmp + blockoff, uspi->s_fpb); 397 } else { 398 *phys = tmp + blockoff; 399 *new = 1; 400 } 401 402 mark_buffer_dirty(bh); 403 if (IS_SYNC(inode)) 404 sync_dirty_buffer(bh); 405 inode->i_ctime = CURRENT_TIME_SEC; 406 mark_inode_dirty(inode); 407 UFSD("result %u\n", tmp + blockoff); 408 out: 409 brelse (bh); 410 UFSD("EXIT\n"); 411 return result; 412 } 413 414 /** 415 * ufs_getfrag_bloc() - `get_block_t' function, interface between UFS and 416 * readpage, writepage and so on 417 */ 418 419 int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create) 420 { 421 struct super_block * sb = inode->i_sb; 422 struct ufs_sb_private_info * uspi = UFS_SB(sb)->s_uspi; 423 struct buffer_head * bh; 424 int ret, err, new; 425 unsigned long ptr,phys; 426 u64 phys64 = 0; 427 428 if (!create) { 429 phys64 = ufs_frag_map(inode, fragment); 430 UFSD("phys64 = %llu \n",phys64); 431 if (phys64) 432 map_bh(bh_result, sb, phys64); 433 return 0; 434 } 435 436 /* This code entered only while writing ....? */ 437 438 err = -EIO; 439 new = 0; 440 ret = 0; 441 bh = NULL; 442 443 lock_kernel(); 444 445 UFSD("ENTER, ino %lu, fragment %llu\n", inode->i_ino, (unsigned long long)fragment); 446 if (fragment < 0) 447 goto abort_negative; 448 if (fragment > 449 ((UFS_NDADDR + uspi->s_apb + uspi->s_2apb + uspi->s_3apb) 450 << uspi->s_fpbshift)) 451 goto abort_too_big; 452 453 err = 0; 454 ptr = fragment; 455 456 /* 457 * ok, these macros clean the logic up a bit and make 458 * it much more readable: 459 */ 460 #define GET_INODE_DATABLOCK(x) \ 461 ufs_inode_getfrag(inode, x, fragment, 1, &err, &phys, &new, bh_result->b_page) 462 #define GET_INODE_PTR(x) \ 463 ufs_inode_getfrag(inode, x, fragment, uspi->s_fpb, &err, NULL, NULL, bh_result->b_page) 464 #define GET_INDIRECT_DATABLOCK(x) \ 465 ufs_inode_getblock(inode, bh, x, fragment, \ 466 &err, &phys, &new, bh_result->b_page); 467 #define GET_INDIRECT_PTR(x) \ 468 ufs_inode_getblock(inode, bh, x, fragment, \ 469 &err, NULL, NULL, bh_result->b_page); 470 471 if (ptr < UFS_NDIR_FRAGMENT) { 472 bh = GET_INODE_DATABLOCK(ptr); 473 goto out; 474 } 475 ptr -= UFS_NDIR_FRAGMENT; 476 if (ptr < (1 << (uspi->s_apbshift + uspi->s_fpbshift))) { 477 bh = GET_INODE_PTR(UFS_IND_FRAGMENT + (ptr >> uspi->s_apbshift)); 478 goto get_indirect; 479 } 480 ptr -= 1 << (uspi->s_apbshift + uspi->s_fpbshift); 481 if (ptr < (1 << (uspi->s_2apbshift + uspi->s_fpbshift))) { 482 bh = GET_INODE_PTR(UFS_DIND_FRAGMENT + (ptr >> uspi->s_2apbshift)); 483 goto get_double; 484 } 485 ptr -= 1 << (uspi->s_2apbshift + uspi->s_fpbshift); 486 bh = GET_INODE_PTR(UFS_TIND_FRAGMENT + (ptr >> uspi->s_3apbshift)); 487 bh = GET_INDIRECT_PTR((ptr >> uspi->s_2apbshift) & uspi->s_apbmask); 488 get_double: 489 bh = GET_INDIRECT_PTR((ptr >> uspi->s_apbshift) & uspi->s_apbmask); 490 get_indirect: 491 bh = GET_INDIRECT_DATABLOCK(ptr & uspi->s_apbmask); 492 493 #undef GET_INODE_DATABLOCK 494 #undef GET_INODE_PTR 495 #undef GET_INDIRECT_DATABLOCK 496 #undef GET_INDIRECT_PTR 497 498 out: 499 if (err) 500 goto abort; 501 if (new) 502 set_buffer_new(bh_result); 503 map_bh(bh_result, sb, phys); 504 abort: 505 unlock_kernel(); 506 return err; 507 508 abort_negative: 509 ufs_warning(sb, "ufs_get_block", "block < 0"); 510 goto abort; 511 512 abort_too_big: 513 ufs_warning(sb, "ufs_get_block", "block > big"); 514 goto abort; 515 } 516 517 struct buffer_head *ufs_getfrag(struct inode *inode, 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 static int ufs_readpage(struct file *file, struct page *page) 563 { 564 return block_read_full_page(page,ufs_getfrag_block); 565 } 566 static int ufs_prepare_write(struct file *file, struct page *page, unsigned from, unsigned to) 567 { 568 return block_prepare_write(page,from,to,ufs_getfrag_block); 569 } 570 static sector_t ufs_bmap(struct address_space *mapping, sector_t block) 571 { 572 return generic_block_bmap(mapping,block,ufs_getfrag_block); 573 } 574 struct address_space_operations ufs_aops = { 575 .readpage = ufs_readpage, 576 .writepage = ufs_writepage, 577 .sync_page = block_sync_page, 578 .prepare_write = ufs_prepare_write, 579 .commit_write = generic_commit_write, 580 .bmap = ufs_bmap 581 }; 582 583 static void ufs_set_inode_ops(struct inode *inode) 584 { 585 if (S_ISREG(inode->i_mode)) { 586 inode->i_op = &ufs_file_inode_operations; 587 inode->i_fop = &ufs_file_operations; 588 inode->i_mapping->a_ops = &ufs_aops; 589 } else if (S_ISDIR(inode->i_mode)) { 590 inode->i_op = &ufs_dir_inode_operations; 591 inode->i_fop = &ufs_dir_operations; 592 inode->i_mapping->a_ops = &ufs_aops; 593 } else if (S_ISLNK(inode->i_mode)) { 594 if (!inode->i_blocks) 595 inode->i_op = &ufs_fast_symlink_inode_operations; 596 else { 597 inode->i_op = &page_symlink_inode_operations; 598 inode->i_mapping->a_ops = &ufs_aops; 599 } 600 } else 601 init_special_inode(inode, inode->i_mode, 602 ufs_get_inode_dev(inode->i_sb, UFS_I(inode))); 603 } 604 605 void ufs_read_inode (struct inode * inode) 606 { 607 struct ufs_inode_info *ufsi = UFS_I(inode); 608 struct super_block * sb; 609 struct ufs_sb_private_info * uspi; 610 struct ufs_inode * ufs_inode; 611 struct ufs2_inode *ufs2_inode; 612 struct buffer_head * bh; 613 mode_t mode; 614 unsigned i; 615 unsigned flags; 616 617 UFSD("ENTER, ino %lu\n", inode->i_ino); 618 619 sb = inode->i_sb; 620 uspi = UFS_SB(sb)->s_uspi; 621 flags = UFS_SB(sb)->s_flags; 622 623 if (inode->i_ino < UFS_ROOTINO || 624 inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) { 625 ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino); 626 goto bad_inode; 627 } 628 629 bh = sb_bread(sb, uspi->s_sbbase + ufs_inotofsba(inode->i_ino)); 630 if (!bh) { 631 ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino); 632 goto bad_inode; 633 } 634 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) 635 goto ufs2_inode; 636 637 ufs_inode = (struct ufs_inode *) (bh->b_data + sizeof(struct ufs_inode) * ufs_inotofsbo(inode->i_ino)); 638 639 /* 640 * Copy data to the in-core inode. 641 */ 642 inode->i_mode = mode = fs16_to_cpu(sb, ufs_inode->ui_mode); 643 inode->i_nlink = fs16_to_cpu(sb, ufs_inode->ui_nlink); 644 if (inode->i_nlink == 0) 645 ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino); 646 647 /* 648 * Linux now has 32-bit uid and gid, so we can support EFT. 649 */ 650 inode->i_uid = ufs_get_inode_uid(sb, ufs_inode); 651 inode->i_gid = ufs_get_inode_gid(sb, ufs_inode); 652 653 inode->i_size = fs64_to_cpu(sb, ufs_inode->ui_size); 654 inode->i_atime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_atime.tv_sec); 655 inode->i_ctime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_ctime.tv_sec); 656 inode->i_mtime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_mtime.tv_sec); 657 inode->i_mtime.tv_nsec = 0; 658 inode->i_atime.tv_nsec = 0; 659 inode->i_ctime.tv_nsec = 0; 660 inode->i_blocks = fs32_to_cpu(sb, ufs_inode->ui_blocks); 661 inode->i_blksize = PAGE_SIZE; /* This is the optimal IO size (for stat) */ 662 inode->i_version++; 663 ufsi->i_flags = fs32_to_cpu(sb, ufs_inode->ui_flags); 664 ufsi->i_gen = fs32_to_cpu(sb, ufs_inode->ui_gen); 665 ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow); 666 ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag); 667 ufsi->i_lastfrag = (inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift; 668 ufsi->i_dir_start_lookup = 0; 669 670 if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) { 671 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR); i++) 672 ufsi->i_u1.i_data[i] = ufs_inode->ui_u2.ui_addr.ui_db[i]; 673 } else { 674 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR) * 4; i++) 675 ufsi->i_u1.i_symlink[i] = ufs_inode->ui_u2.ui_symlink[i]; 676 } 677 ufsi->i_osync = 0; 678 679 ufs_set_inode_ops(inode); 680 681 brelse (bh); 682 683 UFSD("EXIT\n"); 684 return; 685 686 bad_inode: 687 make_bad_inode(inode); 688 return; 689 690 ufs2_inode : 691 UFSD("Reading ufs2 inode, ino %lu\n", inode->i_ino); 692 693 ufs2_inode = (struct ufs2_inode *)(bh->b_data + sizeof(struct ufs2_inode) * ufs_inotofsbo(inode->i_ino)); 694 695 /* 696 * Copy data to the in-core inode. 697 */ 698 inode->i_mode = mode = fs16_to_cpu(sb, ufs2_inode->ui_mode); 699 inode->i_nlink = fs16_to_cpu(sb, ufs2_inode->ui_nlink); 700 if (inode->i_nlink == 0) 701 ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino); 702 703 /* 704 * Linux now has 32-bit uid and gid, so we can support EFT. 705 */ 706 inode->i_uid = fs32_to_cpu(sb, ufs2_inode->ui_uid); 707 inode->i_gid = fs32_to_cpu(sb, ufs2_inode->ui_gid); 708 709 inode->i_size = fs64_to_cpu(sb, ufs2_inode->ui_size); 710 inode->i_atime.tv_sec = fs32_to_cpu(sb, ufs2_inode->ui_atime.tv_sec); 711 inode->i_ctime.tv_sec = fs32_to_cpu(sb, ufs2_inode->ui_ctime.tv_sec); 712 inode->i_mtime.tv_sec = fs32_to_cpu(sb, ufs2_inode->ui_mtime.tv_sec); 713 inode->i_mtime.tv_nsec = 0; 714 inode->i_atime.tv_nsec = 0; 715 inode->i_ctime.tv_nsec = 0; 716 inode->i_blocks = fs64_to_cpu(sb, ufs2_inode->ui_blocks); 717 inode->i_blksize = PAGE_SIZE; /*This is the optimal IO size(for stat)*/ 718 719 inode->i_version++; 720 ufsi->i_flags = fs32_to_cpu(sb, ufs2_inode->ui_flags); 721 ufsi->i_gen = fs32_to_cpu(sb, ufs2_inode->ui_gen); 722 /* 723 ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow); 724 ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag); 725 */ 726 ufsi->i_lastfrag= (inode->i_size + uspi->s_fsize- 1) >> uspi->s_fshift; 727 728 if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) { 729 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR); i++) 730 ufsi->i_u1.u2_i_data[i] = 731 ufs2_inode->ui_u2.ui_addr.ui_db[i]; 732 } 733 else { 734 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR) * 4; i++) 735 ufsi->i_u1.i_symlink[i] = ufs2_inode->ui_u2.ui_symlink[i]; 736 } 737 ufsi->i_osync = 0; 738 739 ufs_set_inode_ops(inode); 740 741 brelse(bh); 742 743 UFSD("EXIT\n"); 744 return; 745 } 746 747 static int ufs_update_inode(struct inode * inode, int do_sync) 748 { 749 struct ufs_inode_info *ufsi = UFS_I(inode); 750 struct super_block * sb; 751 struct ufs_sb_private_info * uspi; 752 struct buffer_head * bh; 753 struct ufs_inode * ufs_inode; 754 unsigned i; 755 unsigned flags; 756 757 UFSD("ENTER, ino %lu\n", inode->i_ino); 758 759 sb = inode->i_sb; 760 uspi = UFS_SB(sb)->s_uspi; 761 flags = UFS_SB(sb)->s_flags; 762 763 if (inode->i_ino < UFS_ROOTINO || 764 inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) { 765 ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino); 766 return -1; 767 } 768 769 bh = sb_bread(sb, ufs_inotofsba(inode->i_ino)); 770 if (!bh) { 771 ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino); 772 return -1; 773 } 774 ufs_inode = (struct ufs_inode *) (bh->b_data + ufs_inotofsbo(inode->i_ino) * sizeof(struct ufs_inode)); 775 776 ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode); 777 ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink); 778 779 ufs_set_inode_uid(sb, ufs_inode, inode->i_uid); 780 ufs_set_inode_gid(sb, ufs_inode, inode->i_gid); 781 782 ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size); 783 ufs_inode->ui_atime.tv_sec = cpu_to_fs32(sb, inode->i_atime.tv_sec); 784 ufs_inode->ui_atime.tv_usec = 0; 785 ufs_inode->ui_ctime.tv_sec = cpu_to_fs32(sb, inode->i_ctime.tv_sec); 786 ufs_inode->ui_ctime.tv_usec = 0; 787 ufs_inode->ui_mtime.tv_sec = cpu_to_fs32(sb, inode->i_mtime.tv_sec); 788 ufs_inode->ui_mtime.tv_usec = 0; 789 ufs_inode->ui_blocks = cpu_to_fs32(sb, inode->i_blocks); 790 ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags); 791 ufs_inode->ui_gen = cpu_to_fs32(sb, ufsi->i_gen); 792 793 if ((flags & UFS_UID_MASK) == UFS_UID_EFT) { 794 ufs_inode->ui_u3.ui_sun.ui_shadow = cpu_to_fs32(sb, ufsi->i_shadow); 795 ufs_inode->ui_u3.ui_sun.ui_oeftflag = cpu_to_fs32(sb, ufsi->i_oeftflag); 796 } 797 798 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { 799 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */ 800 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.i_data[0]; 801 } else if (inode->i_blocks) { 802 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR); i++) 803 ufs_inode->ui_u2.ui_addr.ui_db[i] = ufsi->i_u1.i_data[i]; 804 } 805 else { 806 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR) * 4; i++) 807 ufs_inode->ui_u2.ui_symlink[i] = ufsi->i_u1.i_symlink[i]; 808 } 809 810 if (!inode->i_nlink) 811 memset (ufs_inode, 0, sizeof(struct ufs_inode)); 812 813 mark_buffer_dirty(bh); 814 if (do_sync) 815 sync_dirty_buffer(bh); 816 brelse (bh); 817 818 UFSD("EXIT\n"); 819 return 0; 820 } 821 822 int ufs_write_inode (struct inode * inode, int wait) 823 { 824 int ret; 825 lock_kernel(); 826 ret = ufs_update_inode (inode, wait); 827 unlock_kernel(); 828 return ret; 829 } 830 831 int ufs_sync_inode (struct inode *inode) 832 { 833 return ufs_update_inode (inode, 1); 834 } 835 836 void ufs_delete_inode (struct inode * inode) 837 { 838 truncate_inode_pages(&inode->i_data, 0); 839 /*UFS_I(inode)->i_dtime = CURRENT_TIME;*/ 840 lock_kernel(); 841 mark_inode_dirty(inode); 842 ufs_update_inode(inode, IS_SYNC(inode)); 843 inode->i_size = 0; 844 if (inode->i_blocks) 845 ufs_truncate (inode); 846 ufs_free_inode (inode); 847 unlock_kernel(); 848 } 849