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 } 179 return res; 180 } 181 182 /** 183 * ufs_inode_getfrag() - allocate new fragment(s) 184 * @inode - pointer to inode 185 * @fragment - number of `fragment' which hold pointer 186 * to new allocated fragment(s) 187 * @new_fragment - number of new allocated fragment(s) 188 * @required - how many fragment(s) we require 189 * @err - we set it if something wrong 190 * @phys - pointer to where we save physical number of new allocated fragments, 191 * NULL if we allocate not data(indirect blocks for example). 192 * @new - we set it if we allocate new block 193 * @locked_page - for ufs_new_fragments() 194 */ 195 static struct buffer_head * 196 ufs_inode_getfrag(struct inode *inode, unsigned int fragment, 197 sector_t new_fragment, unsigned int required, int *err, 198 long *phys, int *new, struct page *locked_page) 199 { 200 struct ufs_inode_info *ufsi = UFS_I(inode); 201 struct super_block *sb = inode->i_sb; 202 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 203 struct buffer_head * result; 204 unsigned block, blockoff, lastfrag, lastblock, lastblockoff; 205 unsigned tmp, goal; 206 __fs32 * p, * p2; 207 208 UFSD("ENTER, ino %lu, fragment %u, new_fragment %llu, required %u, " 209 "metadata %d\n", inode->i_ino, fragment, 210 (unsigned long long)new_fragment, required, !phys); 211 212 /* TODO : to be done for write support 213 if ( (flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) 214 goto ufs2; 215 */ 216 217 block = ufs_fragstoblks (fragment); 218 blockoff = ufs_fragnum (fragment); 219 p = ufsi->i_u1.i_data + block; 220 goal = 0; 221 222 repeat: 223 tmp = fs32_to_cpu(sb, *p); 224 lastfrag = ufsi->i_lastfrag; 225 if (tmp && fragment < lastfrag) { 226 if (!phys) { 227 result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff); 228 if (tmp == fs32_to_cpu(sb, *p)) { 229 UFSD("EXIT, result %u\n", tmp + blockoff); 230 return result; 231 } 232 brelse (result); 233 goto repeat; 234 } else { 235 *phys = tmp + blockoff; 236 return NULL; 237 } 238 } 239 240 lastblock = ufs_fragstoblks (lastfrag); 241 lastblockoff = ufs_fragnum (lastfrag); 242 /* 243 * We will extend file into new block beyond last allocated block 244 */ 245 if (lastblock < block) { 246 /* 247 * We must reallocate last allocated block 248 */ 249 if (lastblockoff) { 250 p2 = ufsi->i_u1.i_data + lastblock; 251 tmp = ufs_new_fragments (inode, p2, lastfrag, 252 fs32_to_cpu(sb, *p2), uspi->s_fpb - lastblockoff, 253 err, locked_page); 254 if (!tmp) { 255 if (lastfrag != ufsi->i_lastfrag) 256 goto repeat; 257 else 258 return NULL; 259 } 260 lastfrag = ufsi->i_lastfrag; 261 262 } 263 goal = fs32_to_cpu(sb, ufsi->i_u1.i_data[lastblock]) + uspi->s_fpb; 264 tmp = ufs_new_fragments (inode, p, fragment - blockoff, 265 goal, required + blockoff, 266 err, locked_page); 267 } 268 /* 269 * We will extend last allocated block 270 */ 271 else if (lastblock == block) { 272 tmp = ufs_new_fragments(inode, p, fragment - (blockoff - lastblockoff), 273 fs32_to_cpu(sb, *p), required + (blockoff - lastblockoff), 274 err, locked_page); 275 } 276 /* 277 * We will allocate new block before last allocated block 278 */ 279 else /* (lastblock > block) */ { 280 if (lastblock && (tmp = fs32_to_cpu(sb, ufsi->i_u1.i_data[lastblock-1]))) 281 goal = tmp + uspi->s_fpb; 282 tmp = ufs_new_fragments(inode, p, fragment - blockoff, 283 goal, uspi->s_fpb, err, locked_page); 284 } 285 if (!tmp) { 286 if ((!blockoff && *p) || 287 (blockoff && lastfrag != ufsi->i_lastfrag)) 288 goto repeat; 289 *err = -ENOSPC; 290 return NULL; 291 } 292 293 if (!phys) { 294 result = ufs_clear_frags(inode, tmp + blockoff, required); 295 } else { 296 *phys = tmp + blockoff; 297 result = NULL; 298 *err = 0; 299 *new = 1; 300 } 301 302 inode->i_ctime = CURRENT_TIME_SEC; 303 if (IS_SYNC(inode)) 304 ufs_sync_inode (inode); 305 mark_inode_dirty(inode); 306 UFSD("EXIT, result %u\n", tmp + blockoff); 307 return result; 308 309 /* This part : To be implemented .... 310 Required only for writing, not required for READ-ONLY. 311 ufs2: 312 313 u2_block = ufs_fragstoblks(fragment); 314 u2_blockoff = ufs_fragnum(fragment); 315 p = ufsi->i_u1.u2_i_data + block; 316 goal = 0; 317 318 repeat2: 319 tmp = fs32_to_cpu(sb, *p); 320 lastfrag = ufsi->i_lastfrag; 321 322 */ 323 } 324 325 /** 326 * ufs_inode_getblock() - allocate new block 327 * @inode - pointer to inode 328 * @bh - pointer to block which hold "pointer" to new allocated block 329 * @fragment - number of `fragment' which hold pointer 330 * to new allocated block 331 * @new_fragment - number of new allocated fragment 332 * (block will hold this fragment and also uspi->s_fpb-1) 333 * @err - see ufs_inode_getfrag() 334 * @phys - see ufs_inode_getfrag() 335 * @new - see ufs_inode_getfrag() 336 * @locked_page - see ufs_inode_getfrag() 337 */ 338 static struct buffer_head * 339 ufs_inode_getblock(struct inode *inode, struct buffer_head *bh, 340 unsigned int fragment, sector_t new_fragment, int *err, 341 long *phys, int *new, struct page *locked_page) 342 { 343 struct super_block *sb = inode->i_sb; 344 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 345 struct buffer_head * result; 346 unsigned tmp, goal, block, blockoff; 347 __fs32 * p; 348 349 block = ufs_fragstoblks (fragment); 350 blockoff = ufs_fragnum (fragment); 351 352 UFSD("ENTER, ino %lu, fragment %u, new_fragment %llu, metadata %d\n", 353 inode->i_ino, fragment, (unsigned long long)new_fragment, !phys); 354 355 result = NULL; 356 if (!bh) 357 goto out; 358 if (!buffer_uptodate(bh)) { 359 ll_rw_block (READ, 1, &bh); 360 wait_on_buffer (bh); 361 if (!buffer_uptodate(bh)) 362 goto out; 363 } 364 365 p = (__fs32 *) bh->b_data + block; 366 repeat: 367 tmp = fs32_to_cpu(sb, *p); 368 if (tmp) { 369 if (!phys) { 370 result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff); 371 if (tmp == fs32_to_cpu(sb, *p)) 372 goto out; 373 brelse (result); 374 goto repeat; 375 } else { 376 *phys = tmp + blockoff; 377 goto out; 378 } 379 } 380 381 if (block && (tmp = fs32_to_cpu(sb, ((__fs32*)bh->b_data)[block-1]) + uspi->s_fpb)) 382 goal = tmp + uspi->s_fpb; 383 else 384 goal = bh->b_blocknr + uspi->s_fpb; 385 tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment), goal, 386 uspi->s_fpb, err, locked_page); 387 if (!tmp) { 388 if (fs32_to_cpu(sb, *p)) 389 goto repeat; 390 goto out; 391 } 392 393 394 if (!phys) { 395 result = ufs_clear_frags(inode, tmp + blockoff, uspi->s_fpb); 396 } else { 397 *phys = tmp + blockoff; 398 *new = 1; 399 } 400 401 mark_buffer_dirty(bh); 402 if (IS_SYNC(inode)) 403 sync_dirty_buffer(bh); 404 inode->i_ctime = CURRENT_TIME_SEC; 405 mark_inode_dirty(inode); 406 UFSD("result %u\n", tmp + blockoff); 407 out: 408 brelse (bh); 409 UFSD("EXIT\n"); 410 return result; 411 } 412 413 /** 414 * ufs_getfrag_bloc() - `get_block_t' function, interface between UFS and 415 * readpage, writepage and so on 416 */ 417 418 int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create) 419 { 420 struct super_block * sb = inode->i_sb; 421 struct ufs_sb_private_info * uspi = UFS_SB(sb)->s_uspi; 422 struct buffer_head * bh; 423 int ret, err, new; 424 unsigned long ptr,phys; 425 u64 phys64 = 0; 426 427 if (!create) { 428 phys64 = ufs_frag_map(inode, fragment); 429 UFSD("phys64 = %llu \n",phys64); 430 if (phys64) 431 map_bh(bh_result, sb, phys64); 432 return 0; 433 } 434 435 /* This code entered only while writing ....? */ 436 437 err = -EIO; 438 new = 0; 439 ret = 0; 440 bh = NULL; 441 442 lock_kernel(); 443 444 UFSD("ENTER, ino %lu, fragment %llu\n", inode->i_ino, (unsigned long long)fragment); 445 if (fragment < 0) 446 goto abort_negative; 447 if (fragment > 448 ((UFS_NDADDR + uspi->s_apb + uspi->s_2apb + uspi->s_3apb) 449 << uspi->s_fpbshift)) 450 goto abort_too_big; 451 452 err = 0; 453 ptr = fragment; 454 455 /* 456 * ok, these macros clean the logic up a bit and make 457 * it much more readable: 458 */ 459 #define GET_INODE_DATABLOCK(x) \ 460 ufs_inode_getfrag(inode, x, fragment, 1, &err, &phys, &new, bh_result->b_page) 461 #define GET_INODE_PTR(x) \ 462 ufs_inode_getfrag(inode, x, fragment, uspi->s_fpb, &err, NULL, NULL, 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, bh_result->b_page); 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 struct buffer_head *ufs_getfrag(struct inode *inode, unsigned int fragment, 517 int create, int *err) 518 { 519 struct buffer_head dummy; 520 int error; 521 522 dummy.b_state = 0; 523 dummy.b_blocknr = -1000; 524 error = ufs_getfrag_block(inode, fragment, &dummy, create); 525 *err = error; 526 if (!error && buffer_mapped(&dummy)) { 527 struct buffer_head *bh; 528 bh = sb_getblk(inode->i_sb, dummy.b_blocknr); 529 if (buffer_new(&dummy)) { 530 memset(bh->b_data, 0, inode->i_sb->s_blocksize); 531 set_buffer_uptodate(bh); 532 mark_buffer_dirty(bh); 533 } 534 return bh; 535 } 536 return NULL; 537 } 538 539 struct buffer_head * ufs_bread (struct inode * inode, unsigned fragment, 540 int create, int * err) 541 { 542 struct buffer_head * bh; 543 544 UFSD("ENTER, ino %lu, fragment %u\n", inode->i_ino, fragment); 545 bh = ufs_getfrag (inode, fragment, create, err); 546 if (!bh || buffer_uptodate(bh)) 547 return bh; 548 ll_rw_block (READ, 1, &bh); 549 wait_on_buffer (bh); 550 if (buffer_uptodate(bh)) 551 return bh; 552 brelse (bh); 553 *err = -EIO; 554 return NULL; 555 } 556 557 static int ufs_writepage(struct page *page, struct writeback_control *wbc) 558 { 559 return block_write_full_page(page,ufs_getfrag_block,wbc); 560 } 561 static int ufs_readpage(struct file *file, struct page *page) 562 { 563 return block_read_full_page(page,ufs_getfrag_block); 564 } 565 static int ufs_prepare_write(struct file *file, struct page *page, unsigned from, unsigned to) 566 { 567 return block_prepare_write(page,from,to,ufs_getfrag_block); 568 } 569 static sector_t ufs_bmap(struct address_space *mapping, sector_t block) 570 { 571 return generic_block_bmap(mapping,block,ufs_getfrag_block); 572 } 573 struct address_space_operations ufs_aops = { 574 .readpage = ufs_readpage, 575 .writepage = ufs_writepage, 576 .sync_page = block_sync_page, 577 .prepare_write = ufs_prepare_write, 578 .commit_write = generic_commit_write, 579 .bmap = ufs_bmap 580 }; 581 582 static void ufs_set_inode_ops(struct inode *inode) 583 { 584 if (S_ISREG(inode->i_mode)) { 585 inode->i_op = &ufs_file_inode_operations; 586 inode->i_fop = &ufs_file_operations; 587 inode->i_mapping->a_ops = &ufs_aops; 588 } else if (S_ISDIR(inode->i_mode)) { 589 inode->i_op = &ufs_dir_inode_operations; 590 inode->i_fop = &ufs_dir_operations; 591 inode->i_mapping->a_ops = &ufs_aops; 592 } else if (S_ISLNK(inode->i_mode)) { 593 if (!inode->i_blocks) 594 inode->i_op = &ufs_fast_symlink_inode_operations; 595 else { 596 inode->i_op = &page_symlink_inode_operations; 597 inode->i_mapping->a_ops = &ufs_aops; 598 } 599 } else 600 init_special_inode(inode, inode->i_mode, 601 ufs_get_inode_dev(inode->i_sb, UFS_I(inode))); 602 } 603 604 void ufs_read_inode (struct inode * inode) 605 { 606 struct ufs_inode_info *ufsi = UFS_I(inode); 607 struct super_block * sb; 608 struct ufs_sb_private_info * uspi; 609 struct ufs_inode * ufs_inode; 610 struct ufs2_inode *ufs2_inode; 611 struct buffer_head * bh; 612 mode_t mode; 613 unsigned i; 614 unsigned flags; 615 616 UFSD("ENTER, ino %lu\n", inode->i_ino); 617 618 sb = inode->i_sb; 619 uspi = UFS_SB(sb)->s_uspi; 620 flags = UFS_SB(sb)->s_flags; 621 622 if (inode->i_ino < UFS_ROOTINO || 623 inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) { 624 ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino); 625 goto bad_inode; 626 } 627 628 bh = sb_bread(sb, uspi->s_sbbase + ufs_inotofsba(inode->i_ino)); 629 if (!bh) { 630 ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino); 631 goto bad_inode; 632 } 633 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) 634 goto ufs2_inode; 635 636 ufs_inode = (struct ufs_inode *) (bh->b_data + sizeof(struct ufs_inode) * ufs_inotofsbo(inode->i_ino)); 637 638 /* 639 * Copy data to the in-core inode. 640 */ 641 inode->i_mode = mode = fs16_to_cpu(sb, ufs_inode->ui_mode); 642 inode->i_nlink = fs16_to_cpu(sb, ufs_inode->ui_nlink); 643 if (inode->i_nlink == 0) 644 ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino); 645 646 /* 647 * Linux now has 32-bit uid and gid, so we can support EFT. 648 */ 649 inode->i_uid = ufs_get_inode_uid(sb, ufs_inode); 650 inode->i_gid = ufs_get_inode_gid(sb, ufs_inode); 651 652 inode->i_size = fs64_to_cpu(sb, ufs_inode->ui_size); 653 inode->i_atime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_atime.tv_sec); 654 inode->i_ctime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_ctime.tv_sec); 655 inode->i_mtime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_mtime.tv_sec); 656 inode->i_mtime.tv_nsec = 0; 657 inode->i_atime.tv_nsec = 0; 658 inode->i_ctime.tv_nsec = 0; 659 inode->i_blocks = fs32_to_cpu(sb, ufs_inode->ui_blocks); 660 inode->i_blksize = PAGE_SIZE; /* This is the optimal IO size (for stat) */ 661 inode->i_version++; 662 ufsi->i_flags = fs32_to_cpu(sb, ufs_inode->ui_flags); 663 ufsi->i_gen = fs32_to_cpu(sb, ufs_inode->ui_gen); 664 ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow); 665 ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag); 666 ufsi->i_lastfrag = (inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift; 667 ufsi->i_dir_start_lookup = 0; 668 669 if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) { 670 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR); i++) 671 ufsi->i_u1.i_data[i] = ufs_inode->ui_u2.ui_addr.ui_db[i]; 672 } else { 673 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR) * 4; i++) 674 ufsi->i_u1.i_symlink[i] = ufs_inode->ui_u2.ui_symlink[i]; 675 } 676 ufsi->i_osync = 0; 677 678 ufs_set_inode_ops(inode); 679 680 brelse (bh); 681 682 UFSD("EXIT\n"); 683 return; 684 685 bad_inode: 686 make_bad_inode(inode); 687 return; 688 689 ufs2_inode : 690 UFSD("Reading ufs2 inode, ino %lu\n", inode->i_ino); 691 692 ufs2_inode = (struct ufs2_inode *)(bh->b_data + sizeof(struct ufs2_inode) * ufs_inotofsbo(inode->i_ino)); 693 694 /* 695 * Copy data to the in-core inode. 696 */ 697 inode->i_mode = mode = fs16_to_cpu(sb, ufs2_inode->ui_mode); 698 inode->i_nlink = fs16_to_cpu(sb, ufs2_inode->ui_nlink); 699 if (inode->i_nlink == 0) 700 ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino); 701 702 /* 703 * Linux now has 32-bit uid and gid, so we can support EFT. 704 */ 705 inode->i_uid = fs32_to_cpu(sb, ufs2_inode->ui_uid); 706 inode->i_gid = fs32_to_cpu(sb, ufs2_inode->ui_gid); 707 708 inode->i_size = fs64_to_cpu(sb, ufs2_inode->ui_size); 709 inode->i_atime.tv_sec = fs32_to_cpu(sb, ufs2_inode->ui_atime.tv_sec); 710 inode->i_ctime.tv_sec = fs32_to_cpu(sb, ufs2_inode->ui_ctime.tv_sec); 711 inode->i_mtime.tv_sec = fs32_to_cpu(sb, ufs2_inode->ui_mtime.tv_sec); 712 inode->i_mtime.tv_nsec = 0; 713 inode->i_atime.tv_nsec = 0; 714 inode->i_ctime.tv_nsec = 0; 715 inode->i_blocks = fs64_to_cpu(sb, ufs2_inode->ui_blocks); 716 inode->i_blksize = PAGE_SIZE; /*This is the optimal IO size(for stat)*/ 717 718 inode->i_version++; 719 ufsi->i_flags = fs32_to_cpu(sb, ufs2_inode->ui_flags); 720 ufsi->i_gen = fs32_to_cpu(sb, ufs2_inode->ui_gen); 721 /* 722 ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow); 723 ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag); 724 */ 725 ufsi->i_lastfrag= (inode->i_size + uspi->s_fsize- 1) >> uspi->s_fshift; 726 727 if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) { 728 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR); i++) 729 ufsi->i_u1.u2_i_data[i] = 730 ufs2_inode->ui_u2.ui_addr.ui_db[i]; 731 } 732 else { 733 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR) * 4; i++) 734 ufsi->i_u1.i_symlink[i] = ufs2_inode->ui_u2.ui_symlink[i]; 735 } 736 ufsi->i_osync = 0; 737 738 ufs_set_inode_ops(inode); 739 740 brelse(bh); 741 742 UFSD("EXIT\n"); 743 return; 744 } 745 746 static int ufs_update_inode(struct inode * inode, int do_sync) 747 { 748 struct ufs_inode_info *ufsi = UFS_I(inode); 749 struct super_block * sb; 750 struct ufs_sb_private_info * uspi; 751 struct buffer_head * bh; 752 struct ufs_inode * ufs_inode; 753 unsigned i; 754 unsigned flags; 755 756 UFSD("ENTER, ino %lu\n", inode->i_ino); 757 758 sb = inode->i_sb; 759 uspi = UFS_SB(sb)->s_uspi; 760 flags = UFS_SB(sb)->s_flags; 761 762 if (inode->i_ino < UFS_ROOTINO || 763 inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) { 764 ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino); 765 return -1; 766 } 767 768 bh = sb_bread(sb, ufs_inotofsba(inode->i_ino)); 769 if (!bh) { 770 ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino); 771 return -1; 772 } 773 ufs_inode = (struct ufs_inode *) (bh->b_data + ufs_inotofsbo(inode->i_ino) * sizeof(struct ufs_inode)); 774 775 ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode); 776 ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink); 777 778 ufs_set_inode_uid(sb, ufs_inode, inode->i_uid); 779 ufs_set_inode_gid(sb, ufs_inode, inode->i_gid); 780 781 ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size); 782 ufs_inode->ui_atime.tv_sec = cpu_to_fs32(sb, inode->i_atime.tv_sec); 783 ufs_inode->ui_atime.tv_usec = 0; 784 ufs_inode->ui_ctime.tv_sec = cpu_to_fs32(sb, inode->i_ctime.tv_sec); 785 ufs_inode->ui_ctime.tv_usec = 0; 786 ufs_inode->ui_mtime.tv_sec = cpu_to_fs32(sb, inode->i_mtime.tv_sec); 787 ufs_inode->ui_mtime.tv_usec = 0; 788 ufs_inode->ui_blocks = cpu_to_fs32(sb, inode->i_blocks); 789 ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags); 790 ufs_inode->ui_gen = cpu_to_fs32(sb, ufsi->i_gen); 791 792 if ((flags & UFS_UID_MASK) == UFS_UID_EFT) { 793 ufs_inode->ui_u3.ui_sun.ui_shadow = cpu_to_fs32(sb, ufsi->i_shadow); 794 ufs_inode->ui_u3.ui_sun.ui_oeftflag = cpu_to_fs32(sb, ufsi->i_oeftflag); 795 } 796 797 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { 798 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */ 799 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.i_data[0]; 800 } else if (inode->i_blocks) { 801 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR); i++) 802 ufs_inode->ui_u2.ui_addr.ui_db[i] = ufsi->i_u1.i_data[i]; 803 } 804 else { 805 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR) * 4; i++) 806 ufs_inode->ui_u2.ui_symlink[i] = ufsi->i_u1.i_symlink[i]; 807 } 808 809 if (!inode->i_nlink) 810 memset (ufs_inode, 0, sizeof(struct ufs_inode)); 811 812 mark_buffer_dirty(bh); 813 if (do_sync) 814 sync_dirty_buffer(bh); 815 brelse (bh); 816 817 UFSD("EXIT\n"); 818 return 0; 819 } 820 821 int ufs_write_inode (struct inode * inode, int wait) 822 { 823 int ret; 824 lock_kernel(); 825 ret = ufs_update_inode (inode, wait); 826 unlock_kernel(); 827 return ret; 828 } 829 830 int ufs_sync_inode (struct inode *inode) 831 { 832 return ufs_update_inode (inode, 1); 833 } 834 835 void ufs_delete_inode (struct inode * inode) 836 { 837 truncate_inode_pages(&inode->i_data, 0); 838 /*UFS_I(inode)->i_dtime = CURRENT_TIME;*/ 839 lock_kernel(); 840 mark_inode_dirty(inode); 841 ufs_update_inode(inode, IS_SYNC(inode)); 842 inode->i_size = 0; 843 if (inode->i_blocks) 844 ufs_truncate (inode); 845 ufs_free_inode (inode); 846 unlock_kernel(); 847 } 848