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