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/time.h> 34 #include <linux/stat.h> 35 #include <linux/string.h> 36 #include <linux/mm.h> 37 #include <linux/buffer_head.h> 38 #include <linux/writeback.h> 39 40 #include "ufs_fs.h" 41 #include "ufs.h" 42 #include "swab.h" 43 #include "util.h" 44 45 static u64 ufs_frag_map(struct inode *inode, sector_t frag, bool needs_lock); 46 47 static int ufs_block_to_path(struct inode *inode, sector_t i_block, sector_t offsets[4]) 48 { 49 struct ufs_sb_private_info *uspi = UFS_SB(inode->i_sb)->s_uspi; 50 int ptrs = uspi->s_apb; 51 int ptrs_bits = uspi->s_apbshift; 52 const long direct_blocks = UFS_NDADDR, 53 indirect_blocks = ptrs, 54 double_blocks = (1 << (ptrs_bits * 2)); 55 int n = 0; 56 57 58 UFSD("ptrs=uspi->s_apb = %d,double_blocks=%ld \n",ptrs,double_blocks); 59 if (i_block < direct_blocks) { 60 offsets[n++] = i_block; 61 } else if ((i_block -= direct_blocks) < indirect_blocks) { 62 offsets[n++] = UFS_IND_BLOCK; 63 offsets[n++] = i_block; 64 } else if ((i_block -= indirect_blocks) < double_blocks) { 65 offsets[n++] = UFS_DIND_BLOCK; 66 offsets[n++] = i_block >> ptrs_bits; 67 offsets[n++] = i_block & (ptrs - 1); 68 } else if (((i_block -= double_blocks) >> (ptrs_bits * 2)) < ptrs) { 69 offsets[n++] = UFS_TIND_BLOCK; 70 offsets[n++] = i_block >> (ptrs_bits * 2); 71 offsets[n++] = (i_block >> ptrs_bits) & (ptrs - 1); 72 offsets[n++] = i_block & (ptrs - 1); 73 } else { 74 ufs_warning(inode->i_sb, "ufs_block_to_path", "block > big"); 75 } 76 return n; 77 } 78 79 /* 80 * Returns the location of the fragment from 81 * the begining of the filesystem. 82 */ 83 84 static u64 ufs_frag_map(struct inode *inode, sector_t frag, bool needs_lock) 85 { 86 struct ufs_inode_info *ufsi = UFS_I(inode); 87 struct super_block *sb = inode->i_sb; 88 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 89 u64 mask = (u64) uspi->s_apbmask>>uspi->s_fpbshift; 90 int shift = uspi->s_apbshift-uspi->s_fpbshift; 91 sector_t offsets[4], *p; 92 int depth = ufs_block_to_path(inode, frag >> uspi->s_fpbshift, offsets); 93 u64 ret = 0L; 94 __fs32 block; 95 __fs64 u2_block = 0L; 96 unsigned flags = UFS_SB(sb)->s_flags; 97 u64 temp = 0L; 98 99 UFSD(": frag = %llu depth = %d\n", (unsigned long long)frag, depth); 100 UFSD(": uspi->s_fpbshift = %d ,uspi->s_apbmask = %x, mask=%llx\n", 101 uspi->s_fpbshift, uspi->s_apbmask, 102 (unsigned long long)mask); 103 104 if (depth == 0) 105 return 0; 106 107 p = offsets; 108 109 if (needs_lock) 110 lock_ufs(sb); 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 if (needs_lock) 156 unlock_ufs(sb); 157 return ret; 158 } 159 160 /** 161 * ufs_inode_getfrag() - allocate new fragment(s) 162 * @inode - pointer to inode 163 * @fragment - number of `fragment' which hold pointer 164 * to new allocated fragment(s) 165 * @new_fragment - number of new allocated fragment(s) 166 * @required - how many fragment(s) we require 167 * @err - we set it if something wrong 168 * @phys - pointer to where we save physical number of new allocated fragments, 169 * NULL if we allocate not data(indirect blocks for example). 170 * @new - we set it if we allocate new block 171 * @locked_page - for ufs_new_fragments() 172 */ 173 static struct buffer_head * 174 ufs_inode_getfrag(struct inode *inode, u64 fragment, 175 sector_t new_fragment, unsigned int required, int *err, 176 long *phys, int *new, struct page *locked_page) 177 { 178 struct ufs_inode_info *ufsi = UFS_I(inode); 179 struct super_block *sb = inode->i_sb; 180 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 181 struct buffer_head * result; 182 unsigned blockoff, lastblockoff; 183 u64 tmp, goal, lastfrag, block, lastblock; 184 void *p, *p2; 185 186 UFSD("ENTER, ino %lu, fragment %llu, new_fragment %llu, required %u, " 187 "metadata %d\n", inode->i_ino, (unsigned long long)fragment, 188 (unsigned long long)new_fragment, required, !phys); 189 190 /* TODO : to be done for write support 191 if ( (flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) 192 goto ufs2; 193 */ 194 195 block = ufs_fragstoblks (fragment); 196 blockoff = ufs_fragnum (fragment); 197 p = ufs_get_direct_data_ptr(uspi, ufsi, block); 198 199 goal = 0; 200 201 repeat: 202 tmp = ufs_data_ptr_to_cpu(sb, p); 203 204 lastfrag = ufsi->i_lastfrag; 205 if (tmp && fragment < lastfrag) { 206 if (!phys) { 207 result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff); 208 if (tmp == ufs_data_ptr_to_cpu(sb, p)) { 209 UFSD("EXIT, result %llu\n", 210 (unsigned long long)tmp + blockoff); 211 return result; 212 } 213 brelse (result); 214 goto repeat; 215 } else { 216 *phys = uspi->s_sbbase + tmp + blockoff; 217 return NULL; 218 } 219 } 220 221 lastblock = ufs_fragstoblks (lastfrag); 222 lastblockoff = ufs_fragnum (lastfrag); 223 /* 224 * We will extend file into new block beyond last allocated block 225 */ 226 if (lastblock < block) { 227 /* 228 * We must reallocate last allocated block 229 */ 230 if (lastblockoff) { 231 p2 = ufs_get_direct_data_ptr(uspi, ufsi, lastblock); 232 tmp = ufs_new_fragments(inode, p2, lastfrag, 233 ufs_data_ptr_to_cpu(sb, p2), 234 uspi->s_fpb - lastblockoff, 235 err, locked_page); 236 if (!tmp) { 237 if (lastfrag != ufsi->i_lastfrag) 238 goto repeat; 239 else 240 return NULL; 241 } 242 lastfrag = ufsi->i_lastfrag; 243 244 } 245 tmp = ufs_data_ptr_to_cpu(sb, 246 ufs_get_direct_data_ptr(uspi, ufsi, 247 lastblock)); 248 if (tmp) 249 goal = tmp + uspi->s_fpb; 250 tmp = ufs_new_fragments (inode, p, fragment - blockoff, 251 goal, required + blockoff, 252 err, 253 phys != NULL ? locked_page : NULL); 254 } else if (lastblock == block) { 255 /* 256 * We will extend last allocated block 257 */ 258 tmp = ufs_new_fragments(inode, p, fragment - 259 (blockoff - lastblockoff), 260 ufs_data_ptr_to_cpu(sb, p), 261 required + (blockoff - lastblockoff), 262 err, phys != NULL ? locked_page : NULL); 263 } else /* (lastblock > block) */ { 264 /* 265 * We will allocate new block before last allocated block 266 */ 267 if (block) { 268 tmp = ufs_data_ptr_to_cpu(sb, 269 ufs_get_direct_data_ptr(uspi, ufsi, block - 1)); 270 if (tmp) 271 goal = tmp + uspi->s_fpb; 272 } 273 tmp = ufs_new_fragments(inode, p, fragment - blockoff, 274 goal, uspi->s_fpb, err, 275 phys != NULL ? locked_page : NULL); 276 } 277 if (!tmp) { 278 if ((!blockoff && ufs_data_ptr_to_cpu(sb, p)) || 279 (blockoff && lastfrag != ufsi->i_lastfrag)) 280 goto repeat; 281 *err = -ENOSPC; 282 return NULL; 283 } 284 285 if (!phys) { 286 result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff); 287 } else { 288 *phys = uspi->s_sbbase + tmp + blockoff; 289 result = NULL; 290 *err = 0; 291 *new = 1; 292 } 293 294 inode->i_ctime = CURRENT_TIME_SEC; 295 if (IS_SYNC(inode)) 296 ufs_sync_inode (inode); 297 mark_inode_dirty(inode); 298 UFSD("EXIT, result %llu\n", (unsigned long long)tmp + blockoff); 299 return result; 300 301 /* This part : To be implemented .... 302 Required only for writing, not required for READ-ONLY. 303 ufs2: 304 305 u2_block = ufs_fragstoblks(fragment); 306 u2_blockoff = ufs_fragnum(fragment); 307 p = ufsi->i_u1.u2_i_data + block; 308 goal = 0; 309 310 repeat2: 311 tmp = fs32_to_cpu(sb, *p); 312 lastfrag = ufsi->i_lastfrag; 313 314 */ 315 } 316 317 /** 318 * ufs_inode_getblock() - allocate new block 319 * @inode - pointer to inode 320 * @bh - pointer to block which hold "pointer" to new allocated block 321 * @fragment - number of `fragment' which hold pointer 322 * to new allocated block 323 * @new_fragment - number of new allocated fragment 324 * (block will hold this fragment and also uspi->s_fpb-1) 325 * @err - see ufs_inode_getfrag() 326 * @phys - see ufs_inode_getfrag() 327 * @new - see ufs_inode_getfrag() 328 * @locked_page - see ufs_inode_getfrag() 329 */ 330 static struct buffer_head * 331 ufs_inode_getblock(struct inode *inode, struct buffer_head *bh, 332 u64 fragment, sector_t new_fragment, int *err, 333 long *phys, int *new, struct page *locked_page) 334 { 335 struct super_block *sb = inode->i_sb; 336 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 337 struct buffer_head * result; 338 unsigned blockoff; 339 u64 tmp, goal, block; 340 void *p; 341 342 block = ufs_fragstoblks (fragment); 343 blockoff = ufs_fragnum (fragment); 344 345 UFSD("ENTER, ino %lu, fragment %llu, new_fragment %llu, metadata %d\n", 346 inode->i_ino, (unsigned long long)fragment, 347 (unsigned long long)new_fragment, !phys); 348 349 result = NULL; 350 if (!bh) 351 goto out; 352 if (!buffer_uptodate(bh)) { 353 ll_rw_block (READ, 1, &bh); 354 wait_on_buffer (bh); 355 if (!buffer_uptodate(bh)) 356 goto out; 357 } 358 if (uspi->fs_magic == UFS2_MAGIC) 359 p = (__fs64 *)bh->b_data + block; 360 else 361 p = (__fs32 *)bh->b_data + block; 362 repeat: 363 tmp = ufs_data_ptr_to_cpu(sb, p); 364 if (tmp) { 365 if (!phys) { 366 result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff); 367 if (tmp == ufs_data_ptr_to_cpu(sb, p)) 368 goto out; 369 brelse (result); 370 goto repeat; 371 } else { 372 *phys = uspi->s_sbbase + tmp + blockoff; 373 goto out; 374 } 375 } 376 377 if (block && (uspi->fs_magic == UFS2_MAGIC ? 378 (tmp = fs64_to_cpu(sb, ((__fs64 *)bh->b_data)[block-1])) : 379 (tmp = fs32_to_cpu(sb, ((__fs32 *)bh->b_data)[block-1])))) 380 goal = tmp + uspi->s_fpb; 381 else 382 goal = bh->b_blocknr + uspi->s_fpb; 383 tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment), goal, 384 uspi->s_fpb, err, locked_page); 385 if (!tmp) { 386 if (ufs_data_ptr_to_cpu(sb, p)) 387 goto repeat; 388 goto out; 389 } 390 391 392 if (!phys) { 393 result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff); 394 } else { 395 *phys = uspi->s_sbbase + tmp + blockoff; 396 *new = 1; 397 } 398 399 mark_buffer_dirty(bh); 400 if (IS_SYNC(inode)) 401 sync_dirty_buffer(bh); 402 inode->i_ctime = CURRENT_TIME_SEC; 403 mark_inode_dirty(inode); 404 UFSD("result %llu\n", (unsigned long long)tmp + blockoff); 405 out: 406 brelse (bh); 407 UFSD("EXIT\n"); 408 return result; 409 } 410 411 /** 412 * ufs_getfrag_bloc() - `get_block_t' function, interface between UFS and 413 * readpage, writepage and so on 414 */ 415 416 int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create) 417 { 418 struct super_block * sb = inode->i_sb; 419 struct ufs_sb_info * sbi = UFS_SB(sb); 420 struct ufs_sb_private_info * uspi = sbi->s_uspi; 421 struct buffer_head * bh; 422 int ret, err, new; 423 unsigned long ptr,phys; 424 u64 phys64 = 0; 425 bool needs_lock = (sbi->mutex_owner != current); 426 427 if (!create) { 428 phys64 = ufs_frag_map(inode, fragment, needs_lock); 429 UFSD("phys64 = %llu\n", (unsigned long long)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 if (needs_lock) 443 lock_ufs(sb); 444 445 UFSD("ENTER, ino %lu, fragment %llu\n", inode->i_ino, (unsigned long long)fragment); 446 if (fragment > 447 ((UFS_NDADDR + uspi->s_apb + uspi->s_2apb + uspi->s_3apb) 448 << uspi->s_fpbshift)) 449 goto abort_too_big; 450 451 err = 0; 452 ptr = fragment; 453 454 /* 455 * ok, these macros clean the logic up a bit and make 456 * it much more readable: 457 */ 458 #define GET_INODE_DATABLOCK(x) \ 459 ufs_inode_getfrag(inode, x, fragment, 1, &err, &phys, &new,\ 460 bh_result->b_page) 461 #define GET_INODE_PTR(x) \ 462 ufs_inode_getfrag(inode, x, fragment, uspi->s_fpb, &err, NULL, NULL,\ 463 bh_result->b_page) 464 #define GET_INDIRECT_DATABLOCK(x) \ 465 ufs_inode_getblock(inode, bh, x, fragment, \ 466 &err, &phys, &new, bh_result->b_page) 467 #define GET_INDIRECT_PTR(x) \ 468 ufs_inode_getblock(inode, bh, x, fragment, \ 469 &err, NULL, NULL, NULL) 470 471 if (ptr < UFS_NDIR_FRAGMENT) { 472 bh = GET_INODE_DATABLOCK(ptr); 473 goto out; 474 } 475 ptr -= UFS_NDIR_FRAGMENT; 476 if (ptr < (1 << (uspi->s_apbshift + uspi->s_fpbshift))) { 477 bh = GET_INODE_PTR(UFS_IND_FRAGMENT + (ptr >> uspi->s_apbshift)); 478 goto get_indirect; 479 } 480 ptr -= 1 << (uspi->s_apbshift + uspi->s_fpbshift); 481 if (ptr < (1 << (uspi->s_2apbshift + uspi->s_fpbshift))) { 482 bh = GET_INODE_PTR(UFS_DIND_FRAGMENT + (ptr >> uspi->s_2apbshift)); 483 goto get_double; 484 } 485 ptr -= 1 << (uspi->s_2apbshift + uspi->s_fpbshift); 486 bh = GET_INODE_PTR(UFS_TIND_FRAGMENT + (ptr >> uspi->s_3apbshift)); 487 bh = GET_INDIRECT_PTR((ptr >> uspi->s_2apbshift) & uspi->s_apbmask); 488 get_double: 489 bh = GET_INDIRECT_PTR((ptr >> uspi->s_apbshift) & uspi->s_apbmask); 490 get_indirect: 491 bh = GET_INDIRECT_DATABLOCK(ptr & uspi->s_apbmask); 492 493 #undef GET_INODE_DATABLOCK 494 #undef GET_INODE_PTR 495 #undef GET_INDIRECT_DATABLOCK 496 #undef GET_INDIRECT_PTR 497 498 out: 499 if (err) 500 goto abort; 501 if (new) 502 set_buffer_new(bh_result); 503 map_bh(bh_result, sb, phys); 504 abort: 505 if (needs_lock) 506 unlock_ufs(sb); 507 508 return err; 509 510 abort_too_big: 511 ufs_warning(sb, "ufs_get_block", "block > big"); 512 goto abort; 513 } 514 515 static int ufs_writepage(struct page *page, struct writeback_control *wbc) 516 { 517 return block_write_full_page(page,ufs_getfrag_block,wbc); 518 } 519 520 static int ufs_readpage(struct file *file, struct page *page) 521 { 522 return block_read_full_page(page,ufs_getfrag_block); 523 } 524 525 int ufs_prepare_chunk(struct page *page, loff_t pos, unsigned len) 526 { 527 return __block_write_begin(page, pos, len, ufs_getfrag_block); 528 } 529 530 static int ufs_write_begin(struct file *file, struct address_space *mapping, 531 loff_t pos, unsigned len, unsigned flags, 532 struct page **pagep, void **fsdata) 533 { 534 int ret; 535 536 ret = block_write_begin(mapping, pos, len, flags, pagep, 537 ufs_getfrag_block); 538 if (unlikely(ret)) { 539 loff_t isize = mapping->host->i_size; 540 if (pos + len > isize) 541 vmtruncate(mapping->host, isize); 542 } 543 544 return ret; 545 } 546 547 static sector_t ufs_bmap(struct address_space *mapping, sector_t block) 548 { 549 return generic_block_bmap(mapping,block,ufs_getfrag_block); 550 } 551 552 const struct address_space_operations ufs_aops = { 553 .readpage = ufs_readpage, 554 .writepage = ufs_writepage, 555 .sync_page = block_sync_page, 556 .write_begin = ufs_write_begin, 557 .write_end = generic_write_end, 558 .bmap = ufs_bmap 559 }; 560 561 static void ufs_set_inode_ops(struct inode *inode) 562 { 563 if (S_ISREG(inode->i_mode)) { 564 inode->i_op = &ufs_file_inode_operations; 565 inode->i_fop = &ufs_file_operations; 566 inode->i_mapping->a_ops = &ufs_aops; 567 } else if (S_ISDIR(inode->i_mode)) { 568 inode->i_op = &ufs_dir_inode_operations; 569 inode->i_fop = &ufs_dir_operations; 570 inode->i_mapping->a_ops = &ufs_aops; 571 } else if (S_ISLNK(inode->i_mode)) { 572 if (!inode->i_blocks) 573 inode->i_op = &ufs_fast_symlink_inode_operations; 574 else { 575 inode->i_op = &ufs_symlink_inode_operations; 576 inode->i_mapping->a_ops = &ufs_aops; 577 } 578 } else 579 init_special_inode(inode, inode->i_mode, 580 ufs_get_inode_dev(inode->i_sb, UFS_I(inode))); 581 } 582 583 static int ufs1_read_inode(struct inode *inode, struct ufs_inode *ufs_inode) 584 { 585 struct ufs_inode_info *ufsi = UFS_I(inode); 586 struct super_block *sb = inode->i_sb; 587 mode_t mode; 588 589 /* 590 * Copy data to the in-core inode. 591 */ 592 inode->i_mode = mode = fs16_to_cpu(sb, ufs_inode->ui_mode); 593 inode->i_nlink = fs16_to_cpu(sb, ufs_inode->ui_nlink); 594 if (inode->i_nlink == 0) { 595 ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino); 596 return -1; 597 } 598 599 /* 600 * Linux now has 32-bit uid and gid, so we can support EFT. 601 */ 602 inode->i_uid = ufs_get_inode_uid(sb, ufs_inode); 603 inode->i_gid = ufs_get_inode_gid(sb, ufs_inode); 604 605 inode->i_size = fs64_to_cpu(sb, ufs_inode->ui_size); 606 inode->i_atime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_atime.tv_sec); 607 inode->i_ctime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_ctime.tv_sec); 608 inode->i_mtime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_mtime.tv_sec); 609 inode->i_mtime.tv_nsec = 0; 610 inode->i_atime.tv_nsec = 0; 611 inode->i_ctime.tv_nsec = 0; 612 inode->i_blocks = fs32_to_cpu(sb, ufs_inode->ui_blocks); 613 inode->i_generation = fs32_to_cpu(sb, ufs_inode->ui_gen); 614 ufsi->i_flags = fs32_to_cpu(sb, ufs_inode->ui_flags); 615 ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow); 616 ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag); 617 618 619 if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) { 620 memcpy(ufsi->i_u1.i_data, &ufs_inode->ui_u2.ui_addr, 621 sizeof(ufs_inode->ui_u2.ui_addr)); 622 } else { 623 memcpy(ufsi->i_u1.i_symlink, ufs_inode->ui_u2.ui_symlink, 624 sizeof(ufs_inode->ui_u2.ui_symlink) - 1); 625 ufsi->i_u1.i_symlink[sizeof(ufs_inode->ui_u2.ui_symlink) - 1] = 0; 626 } 627 return 0; 628 } 629 630 static int 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; 635 636 UFSD("Reading ufs2 inode, ino %lu\n", inode->i_ino); 637 /* 638 * Copy data to the in-core inode. 639 */ 640 inode->i_mode = mode = fs16_to_cpu(sb, ufs2_inode->ui_mode); 641 inode->i_nlink = fs16_to_cpu(sb, ufs2_inode->ui_nlink); 642 if (inode->i_nlink == 0) { 643 ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino); 644 return -1; 645 } 646 647 /* 648 * Linux now has 32-bit uid and gid, so we can support EFT. 649 */ 650 inode->i_uid = fs32_to_cpu(sb, ufs2_inode->ui_uid); 651 inode->i_gid = fs32_to_cpu(sb, ufs2_inode->ui_gid); 652 653 inode->i_size = fs64_to_cpu(sb, ufs2_inode->ui_size); 654 inode->i_atime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_atime); 655 inode->i_ctime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_ctime); 656 inode->i_mtime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_mtime); 657 inode->i_atime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_atimensec); 658 inode->i_ctime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_ctimensec); 659 inode->i_mtime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_mtimensec); 660 inode->i_blocks = fs64_to_cpu(sb, ufs2_inode->ui_blocks); 661 inode->i_generation = fs32_to_cpu(sb, ufs2_inode->ui_gen); 662 ufsi->i_flags = fs32_to_cpu(sb, ufs2_inode->ui_flags); 663 /* 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 */ 667 668 if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) { 669 memcpy(ufsi->i_u1.u2_i_data, &ufs2_inode->ui_u2.ui_addr, 670 sizeof(ufs2_inode->ui_u2.ui_addr)); 671 } else { 672 memcpy(ufsi->i_u1.i_symlink, ufs2_inode->ui_u2.ui_symlink, 673 sizeof(ufs2_inode->ui_u2.ui_symlink) - 1); 674 ufsi->i_u1.i_symlink[sizeof(ufs2_inode->ui_u2.ui_symlink) - 1] = 0; 675 } 676 return 0; 677 } 678 679 struct inode *ufs_iget(struct super_block *sb, unsigned long ino) 680 { 681 struct ufs_inode_info *ufsi; 682 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 683 struct buffer_head * bh; 684 struct inode *inode; 685 int err; 686 687 UFSD("ENTER, ino %lu\n", ino); 688 689 if (ino < UFS_ROOTINO || ino > (uspi->s_ncg * uspi->s_ipg)) { 690 ufs_warning(sb, "ufs_read_inode", "bad inode number (%lu)\n", 691 ino); 692 return ERR_PTR(-EIO); 693 } 694 695 inode = iget_locked(sb, ino); 696 if (!inode) 697 return ERR_PTR(-ENOMEM); 698 if (!(inode->i_state & I_NEW)) 699 return inode; 700 701 ufsi = UFS_I(inode); 702 703 bh = sb_bread(sb, uspi->s_sbbase + ufs_inotofsba(inode->i_ino)); 704 if (!bh) { 705 ufs_warning(sb, "ufs_read_inode", "unable to read inode %lu\n", 706 inode->i_ino); 707 goto bad_inode; 708 } 709 if ((UFS_SB(sb)->s_flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { 710 struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data; 711 712 err = ufs2_read_inode(inode, 713 ufs2_inode + ufs_inotofsbo(inode->i_ino)); 714 } else { 715 struct ufs_inode *ufs_inode = (struct ufs_inode *)bh->b_data; 716 717 err = ufs1_read_inode(inode, 718 ufs_inode + ufs_inotofsbo(inode->i_ino)); 719 } 720 721 if (err) 722 goto bad_inode; 723 inode->i_version++; 724 ufsi->i_lastfrag = 725 (inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift; 726 ufsi->i_dir_start_lookup = 0; 727 ufsi->i_osync = 0; 728 729 ufs_set_inode_ops(inode); 730 731 brelse(bh); 732 733 UFSD("EXIT\n"); 734 unlock_new_inode(inode); 735 return inode; 736 737 bad_inode: 738 iget_failed(inode); 739 return ERR_PTR(-EIO); 740 } 741 742 static void ufs1_update_inode(struct inode *inode, struct ufs_inode *ufs_inode) 743 { 744 struct super_block *sb = inode->i_sb; 745 struct ufs_inode_info *ufsi = UFS_I(inode); 746 747 ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode); 748 ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink); 749 750 ufs_set_inode_uid(sb, ufs_inode, inode->i_uid); 751 ufs_set_inode_gid(sb, ufs_inode, inode->i_gid); 752 753 ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size); 754 ufs_inode->ui_atime.tv_sec = cpu_to_fs32(sb, inode->i_atime.tv_sec); 755 ufs_inode->ui_atime.tv_usec = 0; 756 ufs_inode->ui_ctime.tv_sec = cpu_to_fs32(sb, inode->i_ctime.tv_sec); 757 ufs_inode->ui_ctime.tv_usec = 0; 758 ufs_inode->ui_mtime.tv_sec = cpu_to_fs32(sb, inode->i_mtime.tv_sec); 759 ufs_inode->ui_mtime.tv_usec = 0; 760 ufs_inode->ui_blocks = cpu_to_fs32(sb, inode->i_blocks); 761 ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags); 762 ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation); 763 764 if ((UFS_SB(sb)->s_flags & UFS_UID_MASK) == UFS_UID_EFT) { 765 ufs_inode->ui_u3.ui_sun.ui_shadow = cpu_to_fs32(sb, ufsi->i_shadow); 766 ufs_inode->ui_u3.ui_sun.ui_oeftflag = cpu_to_fs32(sb, ufsi->i_oeftflag); 767 } 768 769 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { 770 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */ 771 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.i_data[0]; 772 } else if (inode->i_blocks) { 773 memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.i_data, 774 sizeof(ufs_inode->ui_u2.ui_addr)); 775 } 776 else { 777 memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink, 778 sizeof(ufs_inode->ui_u2.ui_symlink)); 779 } 780 781 if (!inode->i_nlink) 782 memset (ufs_inode, 0, sizeof(struct ufs_inode)); 783 } 784 785 static void ufs2_update_inode(struct inode *inode, struct ufs2_inode *ufs_inode) 786 { 787 struct super_block *sb = inode->i_sb; 788 struct ufs_inode_info *ufsi = UFS_I(inode); 789 790 UFSD("ENTER\n"); 791 ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode); 792 ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink); 793 794 ufs_inode->ui_uid = cpu_to_fs32(sb, inode->i_uid); 795 ufs_inode->ui_gid = cpu_to_fs32(sb, inode->i_gid); 796 797 ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size); 798 ufs_inode->ui_atime = cpu_to_fs64(sb, inode->i_atime.tv_sec); 799 ufs_inode->ui_atimensec = cpu_to_fs32(sb, inode->i_atime.tv_nsec); 800 ufs_inode->ui_ctime = cpu_to_fs64(sb, inode->i_ctime.tv_sec); 801 ufs_inode->ui_ctimensec = cpu_to_fs32(sb, inode->i_ctime.tv_nsec); 802 ufs_inode->ui_mtime = cpu_to_fs64(sb, inode->i_mtime.tv_sec); 803 ufs_inode->ui_mtimensec = cpu_to_fs32(sb, inode->i_mtime.tv_nsec); 804 805 ufs_inode->ui_blocks = cpu_to_fs64(sb, inode->i_blocks); 806 ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags); 807 ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation); 808 809 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { 810 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */ 811 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.u2_i_data[0]; 812 } else if (inode->i_blocks) { 813 memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.u2_i_data, 814 sizeof(ufs_inode->ui_u2.ui_addr)); 815 } else { 816 memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink, 817 sizeof(ufs_inode->ui_u2.ui_symlink)); 818 } 819 820 if (!inode->i_nlink) 821 memset (ufs_inode, 0, sizeof(struct ufs2_inode)); 822 UFSD("EXIT\n"); 823 } 824 825 static int ufs_update_inode(struct inode * inode, int do_sync) 826 { 827 struct super_block *sb = inode->i_sb; 828 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 829 struct buffer_head * bh; 830 831 UFSD("ENTER, ino %lu\n", inode->i_ino); 832 833 if (inode->i_ino < UFS_ROOTINO || 834 inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) { 835 ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino); 836 return -1; 837 } 838 839 bh = sb_bread(sb, ufs_inotofsba(inode->i_ino)); 840 if (!bh) { 841 ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino); 842 return -1; 843 } 844 if (uspi->fs_magic == UFS2_MAGIC) { 845 struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data; 846 847 ufs2_update_inode(inode, 848 ufs2_inode + ufs_inotofsbo(inode->i_ino)); 849 } else { 850 struct ufs_inode *ufs_inode = (struct ufs_inode *) bh->b_data; 851 852 ufs1_update_inode(inode, ufs_inode + ufs_inotofsbo(inode->i_ino)); 853 } 854 855 mark_buffer_dirty(bh); 856 if (do_sync) 857 sync_dirty_buffer(bh); 858 brelse (bh); 859 860 UFSD("EXIT\n"); 861 return 0; 862 } 863 864 int ufs_write_inode(struct inode *inode, struct writeback_control *wbc) 865 { 866 int ret; 867 lock_ufs(inode->i_sb); 868 ret = ufs_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL); 869 unlock_ufs(inode->i_sb); 870 return ret; 871 } 872 873 int ufs_sync_inode (struct inode *inode) 874 { 875 return ufs_update_inode (inode, 1); 876 } 877 878 void ufs_evict_inode(struct inode * inode) 879 { 880 int want_delete = 0; 881 882 if (!inode->i_nlink && !is_bad_inode(inode)) 883 want_delete = 1; 884 885 truncate_inode_pages(&inode->i_data, 0); 886 if (want_delete) { 887 loff_t old_i_size; 888 /*UFS_I(inode)->i_dtime = CURRENT_TIME;*/ 889 lock_ufs(inode->i_sb); 890 mark_inode_dirty(inode); 891 ufs_update_inode(inode, IS_SYNC(inode)); 892 old_i_size = inode->i_size; 893 inode->i_size = 0; 894 if (inode->i_blocks && ufs_truncate(inode, old_i_size)) 895 ufs_warning(inode->i_sb, __func__, "ufs_truncate failed\n"); 896 unlock_ufs(inode->i_sb); 897 } 898 899 invalidate_inode_buffers(inode); 900 end_writeback(inode); 901 902 if (want_delete) { 903 lock_ufs(inode->i_sb); 904 ufs_free_inode (inode); 905 unlock_ufs(inode->i_sb); 906 } 907 } 908