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, 246 phys != NULL ? locked_page : NULL); 247 } 248 /* 249 * We will extend last allocated block 250 */ 251 else if (lastblock == block) { 252 tmp = ufs_new_fragments(inode, p, fragment - (blockoff - lastblockoff), 253 fs32_to_cpu(sb, *p), required + (blockoff - lastblockoff), 254 err, phys != NULL ? locked_page : NULL); 255 } else /* (lastblock > block) */ { 256 /* 257 * We will allocate new block before last allocated block 258 */ 259 if (block) { 260 tmp = fs32_to_cpu(sb, ufsi->i_u1.i_data[block-1]); 261 if (tmp) 262 goal = tmp + uspi->s_fpb; 263 } 264 tmp = ufs_new_fragments(inode, p, fragment - blockoff, 265 goal, uspi->s_fpb, err, 266 phys != NULL ? locked_page : NULL); 267 } 268 if (!tmp) { 269 if ((!blockoff && *p) || 270 (blockoff && lastfrag != ufsi->i_lastfrag)) 271 goto repeat; 272 *err = -ENOSPC; 273 return NULL; 274 } 275 276 if (!phys) { 277 result = sb_getblk(sb, tmp + blockoff); 278 } else { 279 *phys = tmp + blockoff; 280 result = NULL; 281 *err = 0; 282 *new = 1; 283 } 284 285 inode->i_ctime = CURRENT_TIME_SEC; 286 if (IS_SYNC(inode)) 287 ufs_sync_inode (inode); 288 mark_inode_dirty(inode); 289 UFSD("EXIT, result %u\n", tmp + blockoff); 290 return result; 291 292 /* This part : To be implemented .... 293 Required only for writing, not required for READ-ONLY. 294 ufs2: 295 296 u2_block = ufs_fragstoblks(fragment); 297 u2_blockoff = ufs_fragnum(fragment); 298 p = ufsi->i_u1.u2_i_data + block; 299 goal = 0; 300 301 repeat2: 302 tmp = fs32_to_cpu(sb, *p); 303 lastfrag = ufsi->i_lastfrag; 304 305 */ 306 } 307 308 /** 309 * ufs_inode_getblock() - allocate new block 310 * @inode - pointer to inode 311 * @bh - pointer to block which hold "pointer" to new allocated block 312 * @fragment - number of `fragment' which hold pointer 313 * to new allocated block 314 * @new_fragment - number of new allocated fragment 315 * (block will hold this fragment and also uspi->s_fpb-1) 316 * @err - see ufs_inode_getfrag() 317 * @phys - see ufs_inode_getfrag() 318 * @new - see ufs_inode_getfrag() 319 * @locked_page - see ufs_inode_getfrag() 320 */ 321 static struct buffer_head * 322 ufs_inode_getblock(struct inode *inode, struct buffer_head *bh, 323 unsigned int fragment, sector_t new_fragment, int *err, 324 long *phys, int *new, struct page *locked_page) 325 { 326 struct super_block *sb = inode->i_sb; 327 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 328 struct buffer_head * result; 329 unsigned tmp, goal, block, blockoff; 330 __fs32 * p; 331 332 block = ufs_fragstoblks (fragment); 333 blockoff = ufs_fragnum (fragment); 334 335 UFSD("ENTER, ino %lu, fragment %u, new_fragment %llu, metadata %d\n", 336 inode->i_ino, fragment, (unsigned long long)new_fragment, !phys); 337 338 result = NULL; 339 if (!bh) 340 goto out; 341 if (!buffer_uptodate(bh)) { 342 ll_rw_block (READ, 1, &bh); 343 wait_on_buffer (bh); 344 if (!buffer_uptodate(bh)) 345 goto out; 346 } 347 348 p = (__fs32 *) bh->b_data + block; 349 repeat: 350 tmp = fs32_to_cpu(sb, *p); 351 if (tmp) { 352 if (!phys) { 353 result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff); 354 if (tmp == fs32_to_cpu(sb, *p)) 355 goto out; 356 brelse (result); 357 goto repeat; 358 } else { 359 *phys = tmp + blockoff; 360 goto out; 361 } 362 } 363 364 if (block && (tmp = fs32_to_cpu(sb, ((__fs32*)bh->b_data)[block-1]))) 365 goal = tmp + uspi->s_fpb; 366 else 367 goal = bh->b_blocknr + uspi->s_fpb; 368 tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment), goal, 369 uspi->s_fpb, err, locked_page); 370 if (!tmp) { 371 if (fs32_to_cpu(sb, *p)) 372 goto repeat; 373 goto out; 374 } 375 376 377 if (!phys) { 378 result = sb_getblk(sb, tmp + blockoff); 379 } else { 380 *phys = tmp + blockoff; 381 *new = 1; 382 } 383 384 mark_buffer_dirty(bh); 385 if (IS_SYNC(inode)) 386 sync_dirty_buffer(bh); 387 inode->i_ctime = CURRENT_TIME_SEC; 388 mark_inode_dirty(inode); 389 UFSD("result %u\n", tmp + blockoff); 390 out: 391 brelse (bh); 392 UFSD("EXIT\n"); 393 return result; 394 } 395 396 /** 397 * ufs_getfrag_bloc() - `get_block_t' function, interface between UFS and 398 * readpage, writepage and so on 399 */ 400 401 int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create) 402 { 403 struct super_block * sb = inode->i_sb; 404 struct ufs_sb_private_info * uspi = UFS_SB(sb)->s_uspi; 405 struct buffer_head * bh; 406 int ret, err, new; 407 unsigned long ptr,phys; 408 u64 phys64 = 0; 409 410 if (!create) { 411 phys64 = ufs_frag_map(inode, fragment); 412 UFSD("phys64 = %llu\n", (unsigned long long)phys64); 413 if (phys64) 414 map_bh(bh_result, sb, phys64); 415 return 0; 416 } 417 418 /* This code entered only while writing ....? */ 419 420 err = -EIO; 421 new = 0; 422 ret = 0; 423 bh = NULL; 424 425 lock_kernel(); 426 427 UFSD("ENTER, ino %lu, fragment %llu\n", inode->i_ino, (unsigned long long)fragment); 428 if (fragment < 0) 429 goto abort_negative; 430 if (fragment > 431 ((UFS_NDADDR + uspi->s_apb + uspi->s_2apb + uspi->s_3apb) 432 << uspi->s_fpbshift)) 433 goto abort_too_big; 434 435 err = 0; 436 ptr = fragment; 437 438 /* 439 * ok, these macros clean the logic up a bit and make 440 * it much more readable: 441 */ 442 #define GET_INODE_DATABLOCK(x) \ 443 ufs_inode_getfrag(inode, x, fragment, 1, &err, &phys, &new,\ 444 bh_result->b_page) 445 #define GET_INODE_PTR(x) \ 446 ufs_inode_getfrag(inode, x, fragment, uspi->s_fpb, &err, NULL, NULL,\ 447 bh_result->b_page) 448 #define GET_INDIRECT_DATABLOCK(x) \ 449 ufs_inode_getblock(inode, bh, x, fragment, \ 450 &err, &phys, &new, bh_result->b_page) 451 #define GET_INDIRECT_PTR(x) \ 452 ufs_inode_getblock(inode, bh, x, fragment, \ 453 &err, NULL, NULL, NULL) 454 455 if (ptr < UFS_NDIR_FRAGMENT) { 456 bh = GET_INODE_DATABLOCK(ptr); 457 goto out; 458 } 459 ptr -= UFS_NDIR_FRAGMENT; 460 if (ptr < (1 << (uspi->s_apbshift + uspi->s_fpbshift))) { 461 bh = GET_INODE_PTR(UFS_IND_FRAGMENT + (ptr >> uspi->s_apbshift)); 462 goto get_indirect; 463 } 464 ptr -= 1 << (uspi->s_apbshift + uspi->s_fpbshift); 465 if (ptr < (1 << (uspi->s_2apbshift + uspi->s_fpbshift))) { 466 bh = GET_INODE_PTR(UFS_DIND_FRAGMENT + (ptr >> uspi->s_2apbshift)); 467 goto get_double; 468 } 469 ptr -= 1 << (uspi->s_2apbshift + uspi->s_fpbshift); 470 bh = GET_INODE_PTR(UFS_TIND_FRAGMENT + (ptr >> uspi->s_3apbshift)); 471 bh = GET_INDIRECT_PTR((ptr >> uspi->s_2apbshift) & uspi->s_apbmask); 472 get_double: 473 bh = GET_INDIRECT_PTR((ptr >> uspi->s_apbshift) & uspi->s_apbmask); 474 get_indirect: 475 bh = GET_INDIRECT_DATABLOCK(ptr & uspi->s_apbmask); 476 477 #undef GET_INODE_DATABLOCK 478 #undef GET_INODE_PTR 479 #undef GET_INDIRECT_DATABLOCK 480 #undef GET_INDIRECT_PTR 481 482 out: 483 if (err) 484 goto abort; 485 if (new) 486 set_buffer_new(bh_result); 487 map_bh(bh_result, sb, phys); 488 abort: 489 unlock_kernel(); 490 return err; 491 492 abort_negative: 493 ufs_warning(sb, "ufs_get_block", "block < 0"); 494 goto abort; 495 496 abort_too_big: 497 ufs_warning(sb, "ufs_get_block", "block > big"); 498 goto abort; 499 } 500 501 static struct buffer_head *ufs_getfrag(struct inode *inode, 502 unsigned int fragment, 503 int create, int *err) 504 { 505 struct buffer_head dummy; 506 int error; 507 508 dummy.b_state = 0; 509 dummy.b_blocknr = -1000; 510 error = ufs_getfrag_block(inode, fragment, &dummy, create); 511 *err = error; 512 if (!error && buffer_mapped(&dummy)) { 513 struct buffer_head *bh; 514 bh = sb_getblk(inode->i_sb, dummy.b_blocknr); 515 if (buffer_new(&dummy)) { 516 memset(bh->b_data, 0, inode->i_sb->s_blocksize); 517 set_buffer_uptodate(bh); 518 mark_buffer_dirty(bh); 519 } 520 return bh; 521 } 522 return NULL; 523 } 524 525 struct buffer_head * ufs_bread (struct inode * inode, unsigned fragment, 526 int create, int * err) 527 { 528 struct buffer_head * bh; 529 530 UFSD("ENTER, ino %lu, fragment %u\n", inode->i_ino, fragment); 531 bh = ufs_getfrag (inode, fragment, create, err); 532 if (!bh || buffer_uptodate(bh)) 533 return bh; 534 ll_rw_block (READ, 1, &bh); 535 wait_on_buffer (bh); 536 if (buffer_uptodate(bh)) 537 return bh; 538 brelse (bh); 539 *err = -EIO; 540 return NULL; 541 } 542 543 static int ufs_writepage(struct page *page, struct writeback_control *wbc) 544 { 545 return block_write_full_page(page,ufs_getfrag_block,wbc); 546 } 547 static int ufs_readpage(struct file *file, struct page *page) 548 { 549 return block_read_full_page(page,ufs_getfrag_block); 550 } 551 static int ufs_prepare_write(struct file *file, struct page *page, unsigned from, unsigned to) 552 { 553 return block_prepare_write(page,from,to,ufs_getfrag_block); 554 } 555 static sector_t ufs_bmap(struct address_space *mapping, sector_t block) 556 { 557 return generic_block_bmap(mapping,block,ufs_getfrag_block); 558 } 559 const struct address_space_operations ufs_aops = { 560 .readpage = ufs_readpage, 561 .writepage = ufs_writepage, 562 .sync_page = block_sync_page, 563 .prepare_write = ufs_prepare_write, 564 .commit_write = generic_commit_write, 565 .bmap = ufs_bmap 566 }; 567 568 static void ufs_set_inode_ops(struct inode *inode) 569 { 570 if (S_ISREG(inode->i_mode)) { 571 inode->i_op = &ufs_file_inode_operations; 572 inode->i_fop = &ufs_file_operations; 573 inode->i_mapping->a_ops = &ufs_aops; 574 } else if (S_ISDIR(inode->i_mode)) { 575 inode->i_op = &ufs_dir_inode_operations; 576 inode->i_fop = &ufs_dir_operations; 577 inode->i_mapping->a_ops = &ufs_aops; 578 } else if (S_ISLNK(inode->i_mode)) { 579 if (!inode->i_blocks) 580 inode->i_op = &ufs_fast_symlink_inode_operations; 581 else { 582 inode->i_op = &page_symlink_inode_operations; 583 inode->i_mapping->a_ops = &ufs_aops; 584 } 585 } else 586 init_special_inode(inode, inode->i_mode, 587 ufs_get_inode_dev(inode->i_sb, UFS_I(inode))); 588 } 589 590 static void ufs1_read_inode(struct inode *inode, struct ufs_inode *ufs_inode) 591 { 592 struct ufs_inode_info *ufsi = UFS_I(inode); 593 struct super_block *sb = inode->i_sb; 594 mode_t mode; 595 unsigned i; 596 597 /* 598 * Copy data to the in-core inode. 599 */ 600 inode->i_mode = mode = fs16_to_cpu(sb, ufs_inode->ui_mode); 601 inode->i_nlink = fs16_to_cpu(sb, ufs_inode->ui_nlink); 602 if (inode->i_nlink == 0) 603 ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino); 604 605 /* 606 * Linux now has 32-bit uid and gid, so we can support EFT. 607 */ 608 inode->i_uid = ufs_get_inode_uid(sb, ufs_inode); 609 inode->i_gid = ufs_get_inode_gid(sb, ufs_inode); 610 611 inode->i_size = fs64_to_cpu(sb, ufs_inode->ui_size); 612 inode->i_atime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_atime.tv_sec); 613 inode->i_ctime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_ctime.tv_sec); 614 inode->i_mtime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_mtime.tv_sec); 615 inode->i_mtime.tv_nsec = 0; 616 inode->i_atime.tv_nsec = 0; 617 inode->i_ctime.tv_nsec = 0; 618 inode->i_blocks = fs32_to_cpu(sb, ufs_inode->ui_blocks); 619 inode->i_generation = fs32_to_cpu(sb, ufs_inode->ui_gen); 620 ufsi->i_flags = fs32_to_cpu(sb, ufs_inode->ui_flags); 621 ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow); 622 ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag); 623 624 625 if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) { 626 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR); i++) 627 ufsi->i_u1.i_data[i] = ufs_inode->ui_u2.ui_addr.ui_db[i]; 628 } else { 629 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR) * 4; i++) 630 ufsi->i_u1.i_symlink[i] = ufs_inode->ui_u2.ui_symlink[i]; 631 } 632 } 633 634 static void ufs2_read_inode(struct inode *inode, struct ufs2_inode *ufs2_inode) 635 { 636 struct ufs_inode_info *ufsi = UFS_I(inode); 637 struct super_block *sb = inode->i_sb; 638 mode_t mode; 639 unsigned i; 640 641 UFSD("Reading ufs2 inode, ino %lu\n", inode->i_ino); 642 /* 643 * Copy data to the in-core inode. 644 */ 645 inode->i_mode = mode = fs16_to_cpu(sb, ufs2_inode->ui_mode); 646 inode->i_nlink = fs16_to_cpu(sb, ufs2_inode->ui_nlink); 647 if (inode->i_nlink == 0) 648 ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino); 649 650 /* 651 * Linux now has 32-bit uid and gid, so we can support EFT. 652 */ 653 inode->i_uid = fs32_to_cpu(sb, ufs2_inode->ui_uid); 654 inode->i_gid = fs32_to_cpu(sb, ufs2_inode->ui_gid); 655 656 inode->i_size = fs64_to_cpu(sb, ufs2_inode->ui_size); 657 inode->i_atime.tv_sec = fs32_to_cpu(sb, ufs2_inode->ui_atime.tv_sec); 658 inode->i_ctime.tv_sec = fs32_to_cpu(sb, ufs2_inode->ui_ctime.tv_sec); 659 inode->i_mtime.tv_sec = fs32_to_cpu(sb, ufs2_inode->ui_mtime.tv_sec); 660 inode->i_mtime.tv_nsec = 0; 661 inode->i_atime.tv_nsec = 0; 662 inode->i_ctime.tv_nsec = 0; 663 inode->i_blocks = fs64_to_cpu(sb, ufs2_inode->ui_blocks); 664 inode->i_generation = fs32_to_cpu(sb, ufs2_inode->ui_gen); 665 ufsi->i_flags = fs32_to_cpu(sb, ufs2_inode->ui_flags); 666 /* 667 ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow); 668 ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag); 669 */ 670 671 if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) { 672 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR); i++) 673 ufsi->i_u1.u2_i_data[i] = 674 ufs2_inode->ui_u2.ui_addr.ui_db[i]; 675 } else { 676 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR) * 4; i++) 677 ufsi->i_u1.i_symlink[i] = ufs2_inode->ui_u2.ui_symlink[i]; 678 } 679 } 680 681 void ufs_read_inode(struct inode * inode) 682 { 683 struct ufs_inode_info *ufsi = UFS_I(inode); 684 struct super_block * sb; 685 struct ufs_sb_private_info * uspi; 686 struct buffer_head * bh; 687 688 UFSD("ENTER, ino %lu\n", inode->i_ino); 689 690 sb = inode->i_sb; 691 uspi = UFS_SB(sb)->s_uspi; 692 693 if (inode->i_ino < UFS_ROOTINO || 694 inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) { 695 ufs_warning(sb, "ufs_read_inode", "bad inode number (%lu)\n", 696 inode->i_ino); 697 goto bad_inode; 698 } 699 700 bh = sb_bread(sb, uspi->s_sbbase + ufs_inotofsba(inode->i_ino)); 701 if (!bh) { 702 ufs_warning(sb, "ufs_read_inode", "unable to read inode %lu\n", 703 inode->i_ino); 704 goto bad_inode; 705 } 706 if ((UFS_SB(sb)->s_flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { 707 struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data; 708 709 ufs2_read_inode(inode, 710 ufs2_inode + ufs_inotofsbo(inode->i_ino)); 711 } else { 712 struct ufs_inode *ufs_inode = (struct ufs_inode *)bh->b_data; 713 714 ufs1_read_inode(inode, ufs_inode + ufs_inotofsbo(inode->i_ino)); 715 } 716 717 inode->i_version++; 718 ufsi->i_lastfrag = 719 (inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift; 720 ufsi->i_dir_start_lookup = 0; 721 ufsi->i_osync = 0; 722 723 ufs_set_inode_ops(inode); 724 725 brelse(bh); 726 727 UFSD("EXIT\n"); 728 return; 729 730 bad_inode: 731 make_bad_inode(inode); 732 } 733 734 static void ufs1_update_inode(struct inode *inode, struct ufs_inode *ufs_inode) 735 { 736 struct super_block *sb = inode->i_sb; 737 struct ufs_inode_info *ufsi = UFS_I(inode); 738 unsigned i; 739 740 ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode); 741 ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink); 742 743 ufs_set_inode_uid(sb, ufs_inode, inode->i_uid); 744 ufs_set_inode_gid(sb, ufs_inode, inode->i_gid); 745 746 ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size); 747 ufs_inode->ui_atime.tv_sec = cpu_to_fs32(sb, inode->i_atime.tv_sec); 748 ufs_inode->ui_atime.tv_usec = 0; 749 ufs_inode->ui_ctime.tv_sec = cpu_to_fs32(sb, inode->i_ctime.tv_sec); 750 ufs_inode->ui_ctime.tv_usec = 0; 751 ufs_inode->ui_mtime.tv_sec = cpu_to_fs32(sb, inode->i_mtime.tv_sec); 752 ufs_inode->ui_mtime.tv_usec = 0; 753 ufs_inode->ui_blocks = cpu_to_fs32(sb, inode->i_blocks); 754 ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags); 755 ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation); 756 757 if ((UFS_SB(sb)->s_flags & UFS_UID_MASK) == UFS_UID_EFT) { 758 ufs_inode->ui_u3.ui_sun.ui_shadow = cpu_to_fs32(sb, ufsi->i_shadow); 759 ufs_inode->ui_u3.ui_sun.ui_oeftflag = cpu_to_fs32(sb, ufsi->i_oeftflag); 760 } 761 762 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { 763 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */ 764 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.i_data[0]; 765 } else if (inode->i_blocks) { 766 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR); i++) 767 ufs_inode->ui_u2.ui_addr.ui_db[i] = ufsi->i_u1.i_data[i]; 768 } 769 else { 770 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR) * 4; i++) 771 ufs_inode->ui_u2.ui_symlink[i] = ufsi->i_u1.i_symlink[i]; 772 } 773 774 if (!inode->i_nlink) 775 memset (ufs_inode, 0, sizeof(struct ufs_inode)); 776 } 777 778 static void ufs2_update_inode(struct inode *inode, struct ufs2_inode *ufs_inode) 779 { 780 struct super_block *sb = inode->i_sb; 781 struct ufs_inode_info *ufsi = UFS_I(inode); 782 unsigned i; 783 784 UFSD("ENTER\n"); 785 ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode); 786 ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink); 787 788 ufs_inode->ui_uid = cpu_to_fs32(sb, inode->i_uid); 789 ufs_inode->ui_gid = cpu_to_fs32(sb, inode->i_gid); 790 791 ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size); 792 ufs_inode->ui_atime.tv_sec = cpu_to_fs32(sb, inode->i_atime.tv_sec); 793 ufs_inode->ui_atime.tv_usec = 0; 794 ufs_inode->ui_ctime.tv_sec = cpu_to_fs32(sb, inode->i_ctime.tv_sec); 795 ufs_inode->ui_ctime.tv_usec = 0; 796 ufs_inode->ui_mtime.tv_sec = cpu_to_fs32(sb, inode->i_mtime.tv_sec); 797 ufs_inode->ui_mtime.tv_usec = 0; 798 799 ufs_inode->ui_blocks = cpu_to_fs64(sb, inode->i_blocks); 800 ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags); 801 ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation); 802 803 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { 804 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */ 805 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.u2_i_data[0]; 806 } else if (inode->i_blocks) { 807 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR); i++) 808 ufs_inode->ui_u2.ui_addr.ui_db[i] = ufsi->i_u1.u2_i_data[i]; 809 } else { 810 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR) * 4; i++) 811 ufs_inode->ui_u2.ui_symlink[i] = ufsi->i_u1.i_symlink[i]; 812 } 813 814 if (!inode->i_nlink) 815 memset (ufs_inode, 0, sizeof(struct ufs2_inode)); 816 UFSD("EXIT\n"); 817 } 818 819 static int ufs_update_inode(struct inode * inode, int do_sync) 820 { 821 struct super_block *sb = inode->i_sb; 822 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 823 struct buffer_head * bh; 824 825 UFSD("ENTER, ino %lu\n", inode->i_ino); 826 827 if (inode->i_ino < UFS_ROOTINO || 828 inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) { 829 ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino); 830 return -1; 831 } 832 833 bh = sb_bread(sb, ufs_inotofsba(inode->i_ino)); 834 if (!bh) { 835 ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino); 836 return -1; 837 } 838 if (uspi->fs_magic == UFS2_MAGIC) { 839 struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data; 840 841 ufs2_update_inode(inode, 842 ufs2_inode + ufs_inotofsbo(inode->i_ino)); 843 } else { 844 struct ufs_inode *ufs_inode = (struct ufs_inode *) bh->b_data; 845 846 ufs1_update_inode(inode, ufs_inode + ufs_inotofsbo(inode->i_ino)); 847 } 848 849 mark_buffer_dirty(bh); 850 if (do_sync) 851 sync_dirty_buffer(bh); 852 brelse (bh); 853 854 UFSD("EXIT\n"); 855 return 0; 856 } 857 858 int ufs_write_inode (struct inode * inode, int wait) 859 { 860 int ret; 861 lock_kernel(); 862 ret = ufs_update_inode (inode, wait); 863 unlock_kernel(); 864 return ret; 865 } 866 867 int ufs_sync_inode (struct inode *inode) 868 { 869 return ufs_update_inode (inode, 1); 870 } 871 872 void ufs_delete_inode (struct inode * inode) 873 { 874 loff_t old_i_size; 875 876 truncate_inode_pages(&inode->i_data, 0); 877 /*UFS_I(inode)->i_dtime = CURRENT_TIME;*/ 878 lock_kernel(); 879 mark_inode_dirty(inode); 880 ufs_update_inode(inode, IS_SYNC(inode)); 881 old_i_size = inode->i_size; 882 inode->i_size = 0; 883 if (inode->i_blocks && ufs_truncate(inode, old_i_size)) 884 ufs_warning(inode->i_sb, __FUNCTION__, "ufs_truncate failed\n"); 885 ufs_free_inode (inode); 886 unlock_kernel(); 887 } 888