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 /** 160 * ufs_inode_getfrag() - allocate new fragment(s) 161 * @inode - pointer to inode 162 * @fragment - number of `fragment' which hold pointer 163 * to new allocated fragment(s) 164 * @new_fragment - number of new allocated fragment(s) 165 * @required - how many fragment(s) we require 166 * @err - we set it if something wrong 167 * @phys - pointer to where we save physical number of new allocated fragments, 168 * NULL if we allocate not data(indirect blocks for example). 169 * @new - we set it if we allocate new block 170 * @locked_page - for ufs_new_fragments() 171 */ 172 static struct buffer_head * 173 ufs_inode_getfrag(struct inode *inode, unsigned int fragment, 174 sector_t new_fragment, unsigned int required, int *err, 175 long *phys, int *new, struct page *locked_page) 176 { 177 struct ufs_inode_info *ufsi = UFS_I(inode); 178 struct super_block *sb = inode->i_sb; 179 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 180 struct buffer_head * result; 181 unsigned block, blockoff, lastfrag, lastblock, lastblockoff; 182 unsigned tmp, goal; 183 __fs32 * p, * p2; 184 185 UFSD("ENTER, ino %lu, fragment %u, new_fragment %llu, required %u, " 186 "metadata %d\n", inode->i_ino, fragment, 187 (unsigned long long)new_fragment, required, !phys); 188 189 /* TODO : to be done for write support 190 if ( (flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) 191 goto ufs2; 192 */ 193 194 block = ufs_fragstoblks (fragment); 195 blockoff = ufs_fragnum (fragment); 196 p = ufsi->i_u1.i_data + block; 197 goal = 0; 198 199 repeat: 200 tmp = fs32_to_cpu(sb, *p); 201 lastfrag = ufsi->i_lastfrag; 202 if (tmp && fragment < lastfrag) { 203 if (!phys) { 204 result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff); 205 if (tmp == fs32_to_cpu(sb, *p)) { 206 UFSD("EXIT, result %u\n", tmp + blockoff); 207 return result; 208 } 209 brelse (result); 210 goto repeat; 211 } else { 212 *phys = tmp + blockoff; 213 return NULL; 214 } 215 } 216 217 lastblock = ufs_fragstoblks (lastfrag); 218 lastblockoff = ufs_fragnum (lastfrag); 219 /* 220 * We will extend file into new block beyond last allocated block 221 */ 222 if (lastblock < block) { 223 /* 224 * We must reallocate last allocated block 225 */ 226 if (lastblockoff) { 227 p2 = ufsi->i_u1.i_data + lastblock; 228 tmp = ufs_new_fragments (inode, p2, lastfrag, 229 fs32_to_cpu(sb, *p2), uspi->s_fpb - lastblockoff, 230 err, locked_page); 231 if (!tmp) { 232 if (lastfrag != ufsi->i_lastfrag) 233 goto repeat; 234 else 235 return NULL; 236 } 237 lastfrag = ufsi->i_lastfrag; 238 239 } 240 tmp = fs32_to_cpu(sb, ufsi->i_u1.i_data[lastblock]); 241 if (tmp) 242 goal = tmp + uspi->s_fpb; 243 tmp = ufs_new_fragments (inode, p, fragment - blockoff, 244 goal, required + blockoff, 245 err, locked_page); 246 } 247 /* 248 * We will extend last allocated block 249 */ 250 else if (lastblock == block) { 251 tmp = ufs_new_fragments(inode, p, fragment - (blockoff - lastblockoff), 252 fs32_to_cpu(sb, *p), required + (blockoff - lastblockoff), 253 err, locked_page); 254 } else /* (lastblock > block) */ { 255 /* 256 * We will allocate new block before last allocated block 257 */ 258 if (block) { 259 tmp = fs32_to_cpu(sb, ufsi->i_u1.i_data[block-1]); 260 if (tmp) 261 goal = tmp + uspi->s_fpb; 262 } 263 tmp = ufs_new_fragments(inode, p, fragment - blockoff, 264 goal, uspi->s_fpb, err, locked_page); 265 } 266 if (!tmp) { 267 if ((!blockoff && *p) || 268 (blockoff && lastfrag != ufsi->i_lastfrag)) 269 goto repeat; 270 *err = -ENOSPC; 271 return NULL; 272 } 273 274 if (!phys) { 275 result = sb_getblk(sb, tmp + blockoff); 276 } else { 277 *phys = tmp + blockoff; 278 result = NULL; 279 *err = 0; 280 *new = 1; 281 } 282 283 inode->i_ctime = CURRENT_TIME_SEC; 284 if (IS_SYNC(inode)) 285 ufs_sync_inode (inode); 286 mark_inode_dirty(inode); 287 UFSD("EXIT, result %u\n", tmp + blockoff); 288 return result; 289 290 /* This part : To be implemented .... 291 Required only for writing, not required for READ-ONLY. 292 ufs2: 293 294 u2_block = ufs_fragstoblks(fragment); 295 u2_blockoff = ufs_fragnum(fragment); 296 p = ufsi->i_u1.u2_i_data + block; 297 goal = 0; 298 299 repeat2: 300 tmp = fs32_to_cpu(sb, *p); 301 lastfrag = ufsi->i_lastfrag; 302 303 */ 304 } 305 306 /** 307 * ufs_inode_getblock() - allocate new block 308 * @inode - pointer to inode 309 * @bh - pointer to block which hold "pointer" to new allocated block 310 * @fragment - number of `fragment' which hold pointer 311 * to new allocated block 312 * @new_fragment - number of new allocated fragment 313 * (block will hold this fragment and also uspi->s_fpb-1) 314 * @err - see ufs_inode_getfrag() 315 * @phys - see ufs_inode_getfrag() 316 * @new - see ufs_inode_getfrag() 317 * @locked_page - see ufs_inode_getfrag() 318 */ 319 static struct buffer_head * 320 ufs_inode_getblock(struct inode *inode, struct buffer_head *bh, 321 unsigned int fragment, sector_t new_fragment, int *err, 322 long *phys, int *new, struct page *locked_page) 323 { 324 struct super_block *sb = inode->i_sb; 325 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 326 struct buffer_head * result; 327 unsigned tmp, goal, block, blockoff; 328 __fs32 * p; 329 330 block = ufs_fragstoblks (fragment); 331 blockoff = ufs_fragnum (fragment); 332 333 UFSD("ENTER, ino %lu, fragment %u, new_fragment %llu, metadata %d\n", 334 inode->i_ino, fragment, (unsigned long long)new_fragment, !phys); 335 336 result = NULL; 337 if (!bh) 338 goto out; 339 if (!buffer_uptodate(bh)) { 340 ll_rw_block (READ, 1, &bh); 341 wait_on_buffer (bh); 342 if (!buffer_uptodate(bh)) 343 goto out; 344 } 345 346 p = (__fs32 *) bh->b_data + block; 347 repeat: 348 tmp = fs32_to_cpu(sb, *p); 349 if (tmp) { 350 if (!phys) { 351 result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff); 352 if (tmp == fs32_to_cpu(sb, *p)) 353 goto out; 354 brelse (result); 355 goto repeat; 356 } else { 357 *phys = tmp + blockoff; 358 goto out; 359 } 360 } 361 362 if (block && (tmp = fs32_to_cpu(sb, ((__fs32*)bh->b_data)[block-1]))) 363 goal = tmp + uspi->s_fpb; 364 else 365 goal = bh->b_blocknr + uspi->s_fpb; 366 tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment), goal, 367 uspi->s_fpb, err, locked_page); 368 if (!tmp) { 369 if (fs32_to_cpu(sb, *p)) 370 goto repeat; 371 goto out; 372 } 373 374 375 if (!phys) { 376 result = sb_getblk(sb, tmp + blockoff); 377 } else { 378 *phys = tmp + blockoff; 379 *new = 1; 380 } 381 382 mark_buffer_dirty(bh); 383 if (IS_SYNC(inode)) 384 sync_dirty_buffer(bh); 385 inode->i_ctime = CURRENT_TIME_SEC; 386 mark_inode_dirty(inode); 387 UFSD("result %u\n", tmp + blockoff); 388 out: 389 brelse (bh); 390 UFSD("EXIT\n"); 391 return result; 392 } 393 394 /** 395 * ufs_getfrag_bloc() - `get_block_t' function, interface between UFS and 396 * readpage, writepage and so on 397 */ 398 399 int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create) 400 { 401 struct super_block * sb = inode->i_sb; 402 struct ufs_sb_private_info * uspi = UFS_SB(sb)->s_uspi; 403 struct buffer_head * bh; 404 int ret, err, new; 405 unsigned long ptr,phys; 406 u64 phys64 = 0; 407 408 if (!create) { 409 phys64 = ufs_frag_map(inode, fragment); 410 UFSD("phys64 = %llu\n", (unsigned long long)phys64); 411 if (phys64) 412 map_bh(bh_result, sb, phys64); 413 return 0; 414 } 415 416 /* This code entered only while writing ....? */ 417 418 err = -EIO; 419 new = 0; 420 ret = 0; 421 bh = NULL; 422 423 lock_kernel(); 424 425 UFSD("ENTER, ino %lu, fragment %llu\n", inode->i_ino, (unsigned long long)fragment); 426 if (fragment < 0) 427 goto abort_negative; 428 if (fragment > 429 ((UFS_NDADDR + uspi->s_apb + uspi->s_2apb + uspi->s_3apb) 430 << uspi->s_fpbshift)) 431 goto abort_too_big; 432 433 err = 0; 434 ptr = fragment; 435 436 /* 437 * ok, these macros clean the logic up a bit and make 438 * it much more readable: 439 */ 440 #define GET_INODE_DATABLOCK(x) \ 441 ufs_inode_getfrag(inode, x, fragment, 1, &err, &phys, &new, bh_result->b_page) 442 #define GET_INODE_PTR(x) \ 443 ufs_inode_getfrag(inode, x, fragment, uspi->s_fpb, &err, NULL, NULL, NULL) 444 #define GET_INDIRECT_DATABLOCK(x) \ 445 ufs_inode_getblock(inode, bh, x, fragment, \ 446 &err, &phys, &new, bh_result->b_page) 447 #define GET_INDIRECT_PTR(x) \ 448 ufs_inode_getblock(inode, bh, x, fragment, \ 449 &err, NULL, NULL, NULL) 450 451 if (ptr < UFS_NDIR_FRAGMENT) { 452 bh = GET_INODE_DATABLOCK(ptr); 453 goto out; 454 } 455 ptr -= UFS_NDIR_FRAGMENT; 456 if (ptr < (1 << (uspi->s_apbshift + uspi->s_fpbshift))) { 457 bh = GET_INODE_PTR(UFS_IND_FRAGMENT + (ptr >> uspi->s_apbshift)); 458 goto get_indirect; 459 } 460 ptr -= 1 << (uspi->s_apbshift + uspi->s_fpbshift); 461 if (ptr < (1 << (uspi->s_2apbshift + uspi->s_fpbshift))) { 462 bh = GET_INODE_PTR(UFS_DIND_FRAGMENT + (ptr >> uspi->s_2apbshift)); 463 goto get_double; 464 } 465 ptr -= 1 << (uspi->s_2apbshift + uspi->s_fpbshift); 466 bh = GET_INODE_PTR(UFS_TIND_FRAGMENT + (ptr >> uspi->s_3apbshift)); 467 bh = GET_INDIRECT_PTR((ptr >> uspi->s_2apbshift) & uspi->s_apbmask); 468 get_double: 469 bh = GET_INDIRECT_PTR((ptr >> uspi->s_apbshift) & uspi->s_apbmask); 470 get_indirect: 471 bh = GET_INDIRECT_DATABLOCK(ptr & uspi->s_apbmask); 472 473 #undef GET_INODE_DATABLOCK 474 #undef GET_INODE_PTR 475 #undef GET_INDIRECT_DATABLOCK 476 #undef GET_INDIRECT_PTR 477 478 out: 479 if (err) 480 goto abort; 481 if (new) 482 set_buffer_new(bh_result); 483 map_bh(bh_result, sb, phys); 484 abort: 485 unlock_kernel(); 486 return err; 487 488 abort_negative: 489 ufs_warning(sb, "ufs_get_block", "block < 0"); 490 goto abort; 491 492 abort_too_big: 493 ufs_warning(sb, "ufs_get_block", "block > big"); 494 goto abort; 495 } 496 497 static struct buffer_head *ufs_getfrag(struct inode *inode, 498 unsigned int fragment, 499 int create, int *err) 500 { 501 struct buffer_head dummy; 502 int error; 503 504 dummy.b_state = 0; 505 dummy.b_blocknr = -1000; 506 error = ufs_getfrag_block(inode, fragment, &dummy, create); 507 *err = error; 508 if (!error && buffer_mapped(&dummy)) { 509 struct buffer_head *bh; 510 bh = sb_getblk(inode->i_sb, dummy.b_blocknr); 511 if (buffer_new(&dummy)) { 512 memset(bh->b_data, 0, inode->i_sb->s_blocksize); 513 set_buffer_uptodate(bh); 514 mark_buffer_dirty(bh); 515 } 516 return bh; 517 } 518 return NULL; 519 } 520 521 struct buffer_head * ufs_bread (struct inode * inode, unsigned fragment, 522 int create, int * err) 523 { 524 struct buffer_head * bh; 525 526 UFSD("ENTER, ino %lu, fragment %u\n", inode->i_ino, fragment); 527 bh = ufs_getfrag (inode, fragment, create, err); 528 if (!bh || buffer_uptodate(bh)) 529 return bh; 530 ll_rw_block (READ, 1, &bh); 531 wait_on_buffer (bh); 532 if (buffer_uptodate(bh)) 533 return bh; 534 brelse (bh); 535 *err = -EIO; 536 return NULL; 537 } 538 539 static int ufs_writepage(struct page *page, struct writeback_control *wbc) 540 { 541 return block_write_full_page(page,ufs_getfrag_block,wbc); 542 } 543 static int ufs_readpage(struct file *file, struct page *page) 544 { 545 return block_read_full_page(page,ufs_getfrag_block); 546 } 547 static int ufs_prepare_write(struct file *file, struct page *page, unsigned from, unsigned to) 548 { 549 return block_prepare_write(page,from,to,ufs_getfrag_block); 550 } 551 static sector_t ufs_bmap(struct address_space *mapping, sector_t block) 552 { 553 return generic_block_bmap(mapping,block,ufs_getfrag_block); 554 } 555 const struct address_space_operations ufs_aops = { 556 .readpage = ufs_readpage, 557 .writepage = ufs_writepage, 558 .sync_page = block_sync_page, 559 .prepare_write = ufs_prepare_write, 560 .commit_write = generic_commit_write, 561 .bmap = ufs_bmap 562 }; 563 564 static void ufs_set_inode_ops(struct inode *inode) 565 { 566 if (S_ISREG(inode->i_mode)) { 567 inode->i_op = &ufs_file_inode_operations; 568 inode->i_fop = &ufs_file_operations; 569 inode->i_mapping->a_ops = &ufs_aops; 570 } else if (S_ISDIR(inode->i_mode)) { 571 inode->i_op = &ufs_dir_inode_operations; 572 inode->i_fop = &ufs_dir_operations; 573 inode->i_mapping->a_ops = &ufs_aops; 574 } else if (S_ISLNK(inode->i_mode)) { 575 if (!inode->i_blocks) 576 inode->i_op = &ufs_fast_symlink_inode_operations; 577 else { 578 inode->i_op = &page_symlink_inode_operations; 579 inode->i_mapping->a_ops = &ufs_aops; 580 } 581 } else 582 init_special_inode(inode, inode->i_mode, 583 ufs_get_inode_dev(inode->i_sb, UFS_I(inode))); 584 } 585 586 static void ufs1_read_inode(struct inode *inode, struct ufs_inode *ufs_inode) 587 { 588 struct ufs_inode_info *ufsi = UFS_I(inode); 589 struct super_block *sb = inode->i_sb; 590 mode_t mode; 591 unsigned i; 592 593 /* 594 * Copy data to the in-core inode. 595 */ 596 inode->i_mode = mode = fs16_to_cpu(sb, ufs_inode->ui_mode); 597 inode->i_nlink = fs16_to_cpu(sb, ufs_inode->ui_nlink); 598 if (inode->i_nlink == 0) 599 ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino); 600 601 /* 602 * Linux now has 32-bit uid and gid, so we can support EFT. 603 */ 604 inode->i_uid = ufs_get_inode_uid(sb, ufs_inode); 605 inode->i_gid = ufs_get_inode_gid(sb, ufs_inode); 606 607 inode->i_size = fs64_to_cpu(sb, ufs_inode->ui_size); 608 inode->i_atime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_atime.tv_sec); 609 inode->i_ctime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_ctime.tv_sec); 610 inode->i_mtime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_mtime.tv_sec); 611 inode->i_mtime.tv_nsec = 0; 612 inode->i_atime.tv_nsec = 0; 613 inode->i_ctime.tv_nsec = 0; 614 inode->i_blocks = fs32_to_cpu(sb, ufs_inode->ui_blocks); 615 ufsi->i_flags = fs32_to_cpu(sb, ufs_inode->ui_flags); 616 ufsi->i_gen = fs32_to_cpu(sb, ufs_inode->ui_gen); 617 ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow); 618 ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag); 619 620 621 if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) { 622 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR); i++) 623 ufsi->i_u1.i_data[i] = ufs_inode->ui_u2.ui_addr.ui_db[i]; 624 } else { 625 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR) * 4; i++) 626 ufsi->i_u1.i_symlink[i] = ufs_inode->ui_u2.ui_symlink[i]; 627 } 628 } 629 630 static void ufs2_read_inode(struct inode *inode, struct ufs2_inode *ufs2_inode) 631 { 632 struct ufs_inode_info *ufsi = UFS_I(inode); 633 struct super_block *sb = inode->i_sb; 634 mode_t mode; 635 unsigned i; 636 637 UFSD("Reading ufs2 inode, ino %lu\n", inode->i_ino); 638 /* 639 * Copy data to the in-core inode. 640 */ 641 inode->i_mode = mode = fs16_to_cpu(sb, ufs2_inode->ui_mode); 642 inode->i_nlink = fs16_to_cpu(sb, ufs2_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 = fs32_to_cpu(sb, ufs2_inode->ui_uid); 650 inode->i_gid = fs32_to_cpu(sb, ufs2_inode->ui_gid); 651 652 inode->i_size = fs64_to_cpu(sb, ufs2_inode->ui_size); 653 inode->i_atime.tv_sec = fs32_to_cpu(sb, ufs2_inode->ui_atime.tv_sec); 654 inode->i_ctime.tv_sec = fs32_to_cpu(sb, ufs2_inode->ui_ctime.tv_sec); 655 inode->i_mtime.tv_sec = fs32_to_cpu(sb, ufs2_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 = fs64_to_cpu(sb, ufs2_inode->ui_blocks); 660 ufsi->i_flags = fs32_to_cpu(sb, ufs2_inode->ui_flags); 661 ufsi->i_gen = fs32_to_cpu(sb, ufs2_inode->ui_gen); 662 /* 663 ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow); 664 ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag); 665 */ 666 667 if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) { 668 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR); i++) 669 ufsi->i_u1.u2_i_data[i] = 670 ufs2_inode->ui_u2.ui_addr.ui_db[i]; 671 } else { 672 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR) * 4; i++) 673 ufsi->i_u1.i_symlink[i] = ufs2_inode->ui_u2.ui_symlink[i]; 674 } 675 } 676 677 void ufs_read_inode(struct inode * inode) 678 { 679 struct ufs_inode_info *ufsi = UFS_I(inode); 680 struct super_block * sb; 681 struct ufs_sb_private_info * uspi; 682 struct buffer_head * bh; 683 684 UFSD("ENTER, ino %lu\n", inode->i_ino); 685 686 sb = inode->i_sb; 687 uspi = UFS_SB(sb)->s_uspi; 688 689 if (inode->i_ino < UFS_ROOTINO || 690 inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) { 691 ufs_warning(sb, "ufs_read_inode", "bad inode number (%lu)\n", 692 inode->i_ino); 693 goto bad_inode; 694 } 695 696 bh = sb_bread(sb, uspi->s_sbbase + ufs_inotofsba(inode->i_ino)); 697 if (!bh) { 698 ufs_warning(sb, "ufs_read_inode", "unable to read inode %lu\n", 699 inode->i_ino); 700 goto bad_inode; 701 } 702 if ((UFS_SB(sb)->s_flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { 703 struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data; 704 705 ufs2_read_inode(inode, 706 ufs2_inode + ufs_inotofsbo(inode->i_ino)); 707 } else { 708 struct ufs_inode *ufs_inode = (struct ufs_inode *)bh->b_data; 709 710 ufs1_read_inode(inode, ufs_inode + ufs_inotofsbo(inode->i_ino)); 711 } 712 713 inode->i_version++; 714 ufsi->i_lastfrag = 715 (inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift; 716 ufsi->i_dir_start_lookup = 0; 717 ufsi->i_osync = 0; 718 719 ufs_set_inode_ops(inode); 720 721 brelse(bh); 722 723 UFSD("EXIT\n"); 724 return; 725 726 bad_inode: 727 make_bad_inode(inode); 728 } 729 730 static int ufs_update_inode(struct inode * inode, int do_sync) 731 { 732 struct ufs_inode_info *ufsi = UFS_I(inode); 733 struct super_block * sb; 734 struct ufs_sb_private_info * uspi; 735 struct buffer_head * bh; 736 struct ufs_inode * ufs_inode; 737 unsigned i; 738 unsigned flags; 739 740 UFSD("ENTER, ino %lu\n", inode->i_ino); 741 742 sb = inode->i_sb; 743 uspi = UFS_SB(sb)->s_uspi; 744 flags = UFS_SB(sb)->s_flags; 745 746 if (inode->i_ino < UFS_ROOTINO || 747 inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) { 748 ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino); 749 return -1; 750 } 751 752 bh = sb_bread(sb, ufs_inotofsba(inode->i_ino)); 753 if (!bh) { 754 ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino); 755 return -1; 756 } 757 ufs_inode = (struct ufs_inode *) (bh->b_data + ufs_inotofsbo(inode->i_ino) * sizeof(struct ufs_inode)); 758 759 ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode); 760 ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink); 761 762 ufs_set_inode_uid(sb, ufs_inode, inode->i_uid); 763 ufs_set_inode_gid(sb, ufs_inode, inode->i_gid); 764 765 ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size); 766 ufs_inode->ui_atime.tv_sec = cpu_to_fs32(sb, inode->i_atime.tv_sec); 767 ufs_inode->ui_atime.tv_usec = 0; 768 ufs_inode->ui_ctime.tv_sec = cpu_to_fs32(sb, inode->i_ctime.tv_sec); 769 ufs_inode->ui_ctime.tv_usec = 0; 770 ufs_inode->ui_mtime.tv_sec = cpu_to_fs32(sb, inode->i_mtime.tv_sec); 771 ufs_inode->ui_mtime.tv_usec = 0; 772 ufs_inode->ui_blocks = cpu_to_fs32(sb, inode->i_blocks); 773 ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags); 774 ufs_inode->ui_gen = cpu_to_fs32(sb, ufsi->i_gen); 775 776 if ((flags & UFS_UID_MASK) == UFS_UID_EFT) { 777 ufs_inode->ui_u3.ui_sun.ui_shadow = cpu_to_fs32(sb, ufsi->i_shadow); 778 ufs_inode->ui_u3.ui_sun.ui_oeftflag = cpu_to_fs32(sb, ufsi->i_oeftflag); 779 } 780 781 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { 782 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */ 783 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.i_data[0]; 784 } else if (inode->i_blocks) { 785 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR); i++) 786 ufs_inode->ui_u2.ui_addr.ui_db[i] = ufsi->i_u1.i_data[i]; 787 } 788 else { 789 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR) * 4; i++) 790 ufs_inode->ui_u2.ui_symlink[i] = ufsi->i_u1.i_symlink[i]; 791 } 792 793 if (!inode->i_nlink) 794 memset (ufs_inode, 0, sizeof(struct ufs_inode)); 795 796 mark_buffer_dirty(bh); 797 if (do_sync) 798 sync_dirty_buffer(bh); 799 brelse (bh); 800 801 UFSD("EXIT\n"); 802 return 0; 803 } 804 805 int ufs_write_inode (struct inode * inode, int wait) 806 { 807 int ret; 808 lock_kernel(); 809 ret = ufs_update_inode (inode, wait); 810 unlock_kernel(); 811 return ret; 812 } 813 814 int ufs_sync_inode (struct inode *inode) 815 { 816 return ufs_update_inode (inode, 1); 817 } 818 819 void ufs_delete_inode (struct inode * inode) 820 { 821 loff_t old_i_size; 822 823 truncate_inode_pages(&inode->i_data, 0); 824 /*UFS_I(inode)->i_dtime = CURRENT_TIME;*/ 825 lock_kernel(); 826 mark_inode_dirty(inode); 827 ufs_update_inode(inode, IS_SYNC(inode)); 828 old_i_size = inode->i_size; 829 inode->i_size = 0; 830 if (inode->i_blocks && ufs_truncate(inode, old_i_size)) 831 ufs_warning(inode->i_sb, __FUNCTION__, "ufs_truncate failed\n"); 832 ufs_free_inode (inode); 833 unlock_kernel(); 834 } 835