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 30 #include <linux/errno.h> 31 #include <linux/fs.h> 32 #include <linux/time.h> 33 #include <linux/stat.h> 34 #include <linux/string.h> 35 #include <linux/mm.h> 36 #include <linux/buffer_head.h> 37 #include <linux/writeback.h> 38 39 #include "ufs_fs.h" 40 #include "ufs.h" 41 #include "swab.h" 42 #include "util.h" 43 44 static int ufs_block_to_path(struct inode *inode, sector_t i_block, unsigned offsets[4]) 45 { 46 struct ufs_sb_private_info *uspi = UFS_SB(inode->i_sb)->s_uspi; 47 int ptrs = uspi->s_apb; 48 int ptrs_bits = uspi->s_apbshift; 49 const long direct_blocks = UFS_NDADDR, 50 indirect_blocks = ptrs, 51 double_blocks = (1 << (ptrs_bits * 2)); 52 int n = 0; 53 54 55 UFSD("ptrs=uspi->s_apb = %d,double_blocks=%ld \n",ptrs,double_blocks); 56 if (i_block < direct_blocks) { 57 offsets[n++] = i_block; 58 } else if ((i_block -= direct_blocks) < indirect_blocks) { 59 offsets[n++] = UFS_IND_BLOCK; 60 offsets[n++] = i_block; 61 } else if ((i_block -= indirect_blocks) < double_blocks) { 62 offsets[n++] = UFS_DIND_BLOCK; 63 offsets[n++] = i_block >> ptrs_bits; 64 offsets[n++] = i_block & (ptrs - 1); 65 } else if (((i_block -= double_blocks) >> (ptrs_bits * 2)) < ptrs) { 66 offsets[n++] = UFS_TIND_BLOCK; 67 offsets[n++] = i_block >> (ptrs_bits * 2); 68 offsets[n++] = (i_block >> ptrs_bits) & (ptrs - 1); 69 offsets[n++] = i_block & (ptrs - 1); 70 } else { 71 ufs_warning(inode->i_sb, "ufs_block_to_path", "block > big"); 72 } 73 return n; 74 } 75 76 typedef struct { 77 void *p; 78 union { 79 __fs32 key32; 80 __fs64 key64; 81 }; 82 struct buffer_head *bh; 83 } Indirect; 84 85 static inline int grow_chain32(struct ufs_inode_info *ufsi, 86 struct buffer_head *bh, __fs32 *v, 87 Indirect *from, Indirect *to) 88 { 89 Indirect *p; 90 unsigned seq; 91 to->bh = bh; 92 do { 93 seq = read_seqbegin(&ufsi->meta_lock); 94 to->key32 = *(__fs32 *)(to->p = v); 95 for (p = from; p <= to && p->key32 == *(__fs32 *)p->p; p++) 96 ; 97 } while (read_seqretry(&ufsi->meta_lock, seq)); 98 return (p > to); 99 } 100 101 static inline int grow_chain64(struct ufs_inode_info *ufsi, 102 struct buffer_head *bh, __fs64 *v, 103 Indirect *from, Indirect *to) 104 { 105 Indirect *p; 106 unsigned seq; 107 to->bh = bh; 108 do { 109 seq = read_seqbegin(&ufsi->meta_lock); 110 to->key64 = *(__fs64 *)(to->p = v); 111 for (p = from; p <= to && p->key64 == *(__fs64 *)p->p; p++) 112 ; 113 } while (read_seqretry(&ufsi->meta_lock, seq)); 114 return (p > to); 115 } 116 117 /* 118 * Returns the location of the fragment from 119 * the beginning of the filesystem. 120 */ 121 122 static u64 ufs_frag_map(struct inode *inode, sector_t frag) 123 { 124 struct ufs_inode_info *ufsi = UFS_I(inode); 125 struct super_block *sb = inode->i_sb; 126 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 127 u64 mask = (u64) uspi->s_apbmask>>uspi->s_fpbshift; 128 int shift = uspi->s_apbshift-uspi->s_fpbshift; 129 unsigned offsets[4], *p; 130 Indirect chain[4], *q = chain; 131 int depth = ufs_block_to_path(inode, frag >> uspi->s_fpbshift, offsets); 132 unsigned flags = UFS_SB(sb)->s_flags; 133 u64 res = 0; 134 135 UFSD(": frag = %llu depth = %d\n", (unsigned long long)frag, depth); 136 UFSD(": uspi->s_fpbshift = %d ,uspi->s_apbmask = %x, mask=%llx\n", 137 uspi->s_fpbshift, uspi->s_apbmask, 138 (unsigned long long)mask); 139 140 if (depth == 0) 141 goto no_block; 142 143 again: 144 p = offsets; 145 146 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) 147 goto ufs2; 148 149 if (!grow_chain32(ufsi, NULL, &ufsi->i_u1.i_data[*p++], chain, q)) 150 goto changed; 151 if (!q->key32) 152 goto no_block; 153 while (--depth) { 154 __fs32 *ptr; 155 struct buffer_head *bh; 156 unsigned n = *p++; 157 158 bh = sb_bread(sb, uspi->s_sbbase + 159 fs32_to_cpu(sb, q->key32) + (n>>shift)); 160 if (!bh) 161 goto no_block; 162 ptr = (__fs32 *)bh->b_data + (n & mask); 163 if (!grow_chain32(ufsi, bh, ptr, chain, ++q)) 164 goto changed; 165 if (!q->key32) 166 goto no_block; 167 } 168 res = fs32_to_cpu(sb, q->key32); 169 goto found; 170 171 ufs2: 172 if (!grow_chain64(ufsi, NULL, &ufsi->i_u1.u2_i_data[*p++], chain, q)) 173 goto changed; 174 if (!q->key64) 175 goto no_block; 176 177 while (--depth) { 178 __fs64 *ptr; 179 struct buffer_head *bh; 180 unsigned n = *p++; 181 182 bh = sb_bread(sb, uspi->s_sbbase + 183 fs64_to_cpu(sb, q->key64) + (n>>shift)); 184 if (!bh) 185 goto no_block; 186 ptr = (__fs64 *)bh->b_data + (n & mask); 187 if (!grow_chain64(ufsi, bh, ptr, chain, ++q)) 188 goto changed; 189 if (!q->key64) 190 goto no_block; 191 } 192 res = fs64_to_cpu(sb, q->key64); 193 found: 194 res += uspi->s_sbbase + (frag & uspi->s_fpbmask); 195 no_block: 196 while (q > chain) { 197 brelse(q->bh); 198 q--; 199 } 200 return res; 201 202 changed: 203 while (q > chain) { 204 brelse(q->bh); 205 q--; 206 } 207 goto again; 208 } 209 210 /** 211 * ufs_inode_getfrag() - allocate new fragment(s) 212 * @inode: pointer to inode 213 * @fragment: number of `fragment' which hold pointer 214 * to new allocated fragment(s) 215 * @new_fragment: number of new allocated fragment(s) 216 * @required: how many fragment(s) we require 217 * @err: we set it if something wrong 218 * @phys: pointer to where we save physical number of new allocated fragments, 219 * NULL if we allocate not data(indirect blocks for example). 220 * @new: we set it if we allocate new block 221 * @locked_page: for ufs_new_fragments() 222 */ 223 static struct buffer_head * 224 ufs_inode_getfrag(struct inode *inode, u64 fragment, 225 sector_t new_fragment, unsigned int required, int *err, 226 long *phys, int *new, struct page *locked_page) 227 { 228 struct ufs_inode_info *ufsi = UFS_I(inode); 229 struct super_block *sb = inode->i_sb; 230 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 231 struct buffer_head * result; 232 unsigned blockoff, lastblockoff; 233 u64 tmp, goal, lastfrag, block, lastblock; 234 void *p, *p2; 235 236 UFSD("ENTER, ino %lu, fragment %llu, new_fragment %llu, required %u, " 237 "metadata %d\n", inode->i_ino, (unsigned long long)fragment, 238 (unsigned long long)new_fragment, required, !phys); 239 240 /* TODO : to be done for write support 241 if ( (flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) 242 goto ufs2; 243 */ 244 245 block = ufs_fragstoblks (fragment); 246 blockoff = ufs_fragnum (fragment); 247 p = ufs_get_direct_data_ptr(uspi, ufsi, block); 248 249 goal = 0; 250 251 repeat: 252 tmp = ufs_data_ptr_to_cpu(sb, p); 253 254 lastfrag = ufsi->i_lastfrag; 255 if (tmp && fragment < lastfrag) { 256 if (!phys) { 257 result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff); 258 if (tmp == ufs_data_ptr_to_cpu(sb, p)) { 259 UFSD("EXIT, result %llu\n", 260 (unsigned long long)tmp + blockoff); 261 return result; 262 } 263 brelse (result); 264 goto repeat; 265 } else { 266 *phys = uspi->s_sbbase + tmp + blockoff; 267 return NULL; 268 } 269 } 270 271 lastblock = ufs_fragstoblks (lastfrag); 272 lastblockoff = ufs_fragnum (lastfrag); 273 /* 274 * We will extend file into new block beyond last allocated block 275 */ 276 if (lastblock < block) { 277 /* 278 * We must reallocate last allocated block 279 */ 280 if (lastblockoff) { 281 p2 = ufs_get_direct_data_ptr(uspi, ufsi, lastblock); 282 tmp = ufs_new_fragments(inode, p2, lastfrag, 283 ufs_data_ptr_to_cpu(sb, p2), 284 uspi->s_fpb - lastblockoff, 285 err, locked_page); 286 if (!tmp) { 287 if (lastfrag != ufsi->i_lastfrag) 288 goto repeat; 289 else 290 return NULL; 291 } 292 lastfrag = ufsi->i_lastfrag; 293 294 } 295 tmp = ufs_data_ptr_to_cpu(sb, 296 ufs_get_direct_data_ptr(uspi, ufsi, 297 lastblock)); 298 if (tmp) 299 goal = tmp + uspi->s_fpb; 300 tmp = ufs_new_fragments (inode, p, fragment - blockoff, 301 goal, required + blockoff, 302 err, 303 phys != NULL ? locked_page : NULL); 304 } else if (lastblock == block) { 305 /* 306 * We will extend last allocated block 307 */ 308 tmp = ufs_new_fragments(inode, p, fragment - 309 (blockoff - lastblockoff), 310 ufs_data_ptr_to_cpu(sb, p), 311 required + (blockoff - lastblockoff), 312 err, phys != NULL ? locked_page : NULL); 313 } else /* (lastblock > block) */ { 314 /* 315 * We will allocate new block before last allocated block 316 */ 317 if (block) { 318 tmp = ufs_data_ptr_to_cpu(sb, 319 ufs_get_direct_data_ptr(uspi, ufsi, block - 1)); 320 if (tmp) 321 goal = tmp + uspi->s_fpb; 322 } 323 tmp = ufs_new_fragments(inode, p, fragment - blockoff, 324 goal, uspi->s_fpb, err, 325 phys != NULL ? locked_page : NULL); 326 } 327 if (!tmp) { 328 if ((!blockoff && ufs_data_ptr_to_cpu(sb, p)) || 329 (blockoff && lastfrag != ufsi->i_lastfrag)) 330 goto repeat; 331 *err = -ENOSPC; 332 return NULL; 333 } 334 335 if (!phys) { 336 result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff); 337 } else { 338 *phys = uspi->s_sbbase + tmp + blockoff; 339 result = NULL; 340 *err = 0; 341 *new = 1; 342 } 343 344 inode->i_ctime = CURRENT_TIME_SEC; 345 if (IS_SYNC(inode)) 346 ufs_sync_inode (inode); 347 mark_inode_dirty(inode); 348 UFSD("EXIT, result %llu\n", (unsigned long long)tmp + blockoff); 349 return result; 350 351 /* This part : To be implemented .... 352 Required only for writing, not required for READ-ONLY. 353 ufs2: 354 355 u2_block = ufs_fragstoblks(fragment); 356 u2_blockoff = ufs_fragnum(fragment); 357 p = ufsi->i_u1.u2_i_data + block; 358 goal = 0; 359 360 repeat2: 361 tmp = fs32_to_cpu(sb, *p); 362 lastfrag = ufsi->i_lastfrag; 363 364 */ 365 } 366 367 /** 368 * ufs_inode_getblock() - allocate new block 369 * @inode: pointer to inode 370 * @bh: pointer to block which hold "pointer" to new allocated block 371 * @fragment: number of `fragment' which hold pointer 372 * to new allocated block 373 * @new_fragment: number of new allocated fragment 374 * (block will hold this fragment and also uspi->s_fpb-1) 375 * @err: see ufs_inode_getfrag() 376 * @phys: see ufs_inode_getfrag() 377 * @new: see ufs_inode_getfrag() 378 * @locked_page: see ufs_inode_getfrag() 379 */ 380 static struct buffer_head * 381 ufs_inode_getblock(struct inode *inode, struct buffer_head *bh, 382 u64 fragment, sector_t new_fragment, int *err, 383 long *phys, int *new, struct page *locked_page) 384 { 385 struct super_block *sb = inode->i_sb; 386 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 387 struct buffer_head * result; 388 unsigned blockoff; 389 u64 tmp, goal, block; 390 void *p; 391 392 block = ufs_fragstoblks (fragment); 393 blockoff = ufs_fragnum (fragment); 394 395 UFSD("ENTER, ino %lu, fragment %llu, new_fragment %llu, metadata %d\n", 396 inode->i_ino, (unsigned long long)fragment, 397 (unsigned long long)new_fragment, !phys); 398 399 result = NULL; 400 if (!bh) 401 goto out; 402 if (!buffer_uptodate(bh)) { 403 ll_rw_block (READ, 1, &bh); 404 wait_on_buffer (bh); 405 if (!buffer_uptodate(bh)) 406 goto out; 407 } 408 if (uspi->fs_magic == UFS2_MAGIC) 409 p = (__fs64 *)bh->b_data + block; 410 else 411 p = (__fs32 *)bh->b_data + block; 412 repeat: 413 tmp = ufs_data_ptr_to_cpu(sb, p); 414 if (tmp) { 415 if (!phys) { 416 result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff); 417 if (tmp == ufs_data_ptr_to_cpu(sb, p)) 418 goto out; 419 brelse (result); 420 goto repeat; 421 } else { 422 *phys = uspi->s_sbbase + tmp + blockoff; 423 goto out; 424 } 425 } 426 427 if (block && (uspi->fs_magic == UFS2_MAGIC ? 428 (tmp = fs64_to_cpu(sb, ((__fs64 *)bh->b_data)[block-1])) : 429 (tmp = fs32_to_cpu(sb, ((__fs32 *)bh->b_data)[block-1])))) 430 goal = tmp + uspi->s_fpb; 431 else 432 goal = bh->b_blocknr + uspi->s_fpb; 433 tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment), goal, 434 uspi->s_fpb, err, locked_page); 435 if (!tmp) { 436 if (ufs_data_ptr_to_cpu(sb, p)) 437 goto repeat; 438 goto out; 439 } 440 441 442 if (!phys) { 443 result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff); 444 } else { 445 *phys = uspi->s_sbbase + tmp + blockoff; 446 *new = 1; 447 } 448 449 mark_buffer_dirty(bh); 450 if (IS_SYNC(inode)) 451 sync_dirty_buffer(bh); 452 inode->i_ctime = CURRENT_TIME_SEC; 453 mark_inode_dirty(inode); 454 UFSD("result %llu\n", (unsigned long long)tmp + blockoff); 455 out: 456 brelse (bh); 457 UFSD("EXIT\n"); 458 return result; 459 } 460 461 /** 462 * ufs_getfrag_block() - `get_block_t' function, interface between UFS and 463 * readpage, writepage and so on 464 */ 465 466 static int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create) 467 { 468 struct super_block * sb = inode->i_sb; 469 struct ufs_sb_info * sbi = UFS_SB(sb); 470 struct ufs_sb_private_info * uspi = sbi->s_uspi; 471 struct buffer_head * bh; 472 int ret, err, new; 473 unsigned long ptr,phys; 474 u64 phys64 = 0; 475 476 if (!create) { 477 phys64 = ufs_frag_map(inode, fragment); 478 UFSD("phys64 = %llu\n", (unsigned long long)phys64); 479 if (phys64) 480 map_bh(bh_result, sb, phys64); 481 return 0; 482 } 483 484 /* This code entered only while writing ....? */ 485 486 err = -EIO; 487 new = 0; 488 ret = 0; 489 bh = NULL; 490 491 mutex_lock(&UFS_I(inode)->truncate_mutex); 492 493 UFSD("ENTER, ino %lu, fragment %llu\n", inode->i_ino, (unsigned long long)fragment); 494 if (fragment > 495 ((UFS_NDADDR + uspi->s_apb + uspi->s_2apb + uspi->s_3apb) 496 << uspi->s_fpbshift)) 497 goto abort_too_big; 498 499 err = 0; 500 ptr = fragment; 501 502 /* 503 * ok, these macros clean the logic up a bit and make 504 * it much more readable: 505 */ 506 #define GET_INODE_DATABLOCK(x) \ 507 ufs_inode_getfrag(inode, x, fragment, 1, &err, &phys, &new,\ 508 bh_result->b_page) 509 #define GET_INODE_PTR(x) \ 510 ufs_inode_getfrag(inode, x, fragment, uspi->s_fpb, &err, NULL, NULL,\ 511 bh_result->b_page) 512 #define GET_INDIRECT_DATABLOCK(x) \ 513 ufs_inode_getblock(inode, bh, x, fragment, \ 514 &err, &phys, &new, bh_result->b_page) 515 #define GET_INDIRECT_PTR(x) \ 516 ufs_inode_getblock(inode, bh, x, fragment, \ 517 &err, NULL, NULL, NULL) 518 519 if (ptr < UFS_NDIR_FRAGMENT) { 520 bh = GET_INODE_DATABLOCK(ptr); 521 goto out; 522 } 523 ptr -= UFS_NDIR_FRAGMENT; 524 if (ptr < (1 << (uspi->s_apbshift + uspi->s_fpbshift))) { 525 bh = GET_INODE_PTR(UFS_IND_FRAGMENT + (ptr >> uspi->s_apbshift)); 526 goto get_indirect; 527 } 528 ptr -= 1 << (uspi->s_apbshift + uspi->s_fpbshift); 529 if (ptr < (1 << (uspi->s_2apbshift + uspi->s_fpbshift))) { 530 bh = GET_INODE_PTR(UFS_DIND_FRAGMENT + (ptr >> uspi->s_2apbshift)); 531 goto get_double; 532 } 533 ptr -= 1 << (uspi->s_2apbshift + uspi->s_fpbshift); 534 bh = GET_INODE_PTR(UFS_TIND_FRAGMENT + (ptr >> uspi->s_3apbshift)); 535 bh = GET_INDIRECT_PTR((ptr >> uspi->s_2apbshift) & uspi->s_apbmask); 536 get_double: 537 bh = GET_INDIRECT_PTR((ptr >> uspi->s_apbshift) & uspi->s_apbmask); 538 get_indirect: 539 bh = GET_INDIRECT_DATABLOCK(ptr & uspi->s_apbmask); 540 541 #undef GET_INODE_DATABLOCK 542 #undef GET_INODE_PTR 543 #undef GET_INDIRECT_DATABLOCK 544 #undef GET_INDIRECT_PTR 545 546 out: 547 if (err) 548 goto abort; 549 if (new) 550 set_buffer_new(bh_result); 551 map_bh(bh_result, sb, phys); 552 abort: 553 mutex_unlock(&UFS_I(inode)->truncate_mutex); 554 555 return err; 556 557 abort_too_big: 558 ufs_warning(sb, "ufs_get_block", "block > big"); 559 goto abort; 560 } 561 562 static int ufs_writepage(struct page *page, struct writeback_control *wbc) 563 { 564 return block_write_full_page(page,ufs_getfrag_block,wbc); 565 } 566 567 static int ufs_readpage(struct file *file, struct page *page) 568 { 569 return block_read_full_page(page,ufs_getfrag_block); 570 } 571 572 int ufs_prepare_chunk(struct page *page, loff_t pos, unsigned len) 573 { 574 return __block_write_begin(page, pos, len, ufs_getfrag_block); 575 } 576 577 static void ufs_truncate_blocks(struct inode *); 578 579 static void ufs_write_failed(struct address_space *mapping, loff_t to) 580 { 581 struct inode *inode = mapping->host; 582 583 if (to > inode->i_size) { 584 truncate_pagecache(inode, inode->i_size); 585 ufs_truncate_blocks(inode); 586 } 587 } 588 589 static int ufs_write_begin(struct file *file, struct address_space *mapping, 590 loff_t pos, unsigned len, unsigned flags, 591 struct page **pagep, void **fsdata) 592 { 593 int ret; 594 595 ret = block_write_begin(mapping, pos, len, flags, pagep, 596 ufs_getfrag_block); 597 if (unlikely(ret)) 598 ufs_write_failed(mapping, pos + len); 599 600 return ret; 601 } 602 603 static int ufs_write_end(struct file *file, struct address_space *mapping, 604 loff_t pos, unsigned len, unsigned copied, 605 struct page *page, void *fsdata) 606 { 607 int ret; 608 609 ret = generic_write_end(file, mapping, pos, len, copied, page, fsdata); 610 if (ret < len) 611 ufs_write_failed(mapping, pos + len); 612 return ret; 613 } 614 615 static sector_t ufs_bmap(struct address_space *mapping, sector_t block) 616 { 617 return generic_block_bmap(mapping,block,ufs_getfrag_block); 618 } 619 620 const struct address_space_operations ufs_aops = { 621 .readpage = ufs_readpage, 622 .writepage = ufs_writepage, 623 .write_begin = ufs_write_begin, 624 .write_end = ufs_write_end, 625 .bmap = ufs_bmap 626 }; 627 628 static void ufs_set_inode_ops(struct inode *inode) 629 { 630 if (S_ISREG(inode->i_mode)) { 631 inode->i_op = &ufs_file_inode_operations; 632 inode->i_fop = &ufs_file_operations; 633 inode->i_mapping->a_ops = &ufs_aops; 634 } else if (S_ISDIR(inode->i_mode)) { 635 inode->i_op = &ufs_dir_inode_operations; 636 inode->i_fop = &ufs_dir_operations; 637 inode->i_mapping->a_ops = &ufs_aops; 638 } else if (S_ISLNK(inode->i_mode)) { 639 if (!inode->i_blocks) { 640 inode->i_op = &ufs_fast_symlink_inode_operations; 641 inode->i_link = (char *)UFS_I(inode)->i_u1.i_symlink; 642 } else { 643 inode->i_op = &ufs_symlink_inode_operations; 644 inode->i_mapping->a_ops = &ufs_aops; 645 } 646 } else 647 init_special_inode(inode, inode->i_mode, 648 ufs_get_inode_dev(inode->i_sb, UFS_I(inode))); 649 } 650 651 static int ufs1_read_inode(struct inode *inode, struct ufs_inode *ufs_inode) 652 { 653 struct ufs_inode_info *ufsi = UFS_I(inode); 654 struct super_block *sb = inode->i_sb; 655 umode_t mode; 656 657 /* 658 * Copy data to the in-core inode. 659 */ 660 inode->i_mode = mode = fs16_to_cpu(sb, ufs_inode->ui_mode); 661 set_nlink(inode, fs16_to_cpu(sb, ufs_inode->ui_nlink)); 662 if (inode->i_nlink == 0) { 663 ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino); 664 return -1; 665 } 666 667 /* 668 * Linux now has 32-bit uid and gid, so we can support EFT. 669 */ 670 i_uid_write(inode, ufs_get_inode_uid(sb, ufs_inode)); 671 i_gid_write(inode, ufs_get_inode_gid(sb, ufs_inode)); 672 673 inode->i_size = fs64_to_cpu(sb, ufs_inode->ui_size); 674 inode->i_atime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_atime.tv_sec); 675 inode->i_ctime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_ctime.tv_sec); 676 inode->i_mtime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_mtime.tv_sec); 677 inode->i_mtime.tv_nsec = 0; 678 inode->i_atime.tv_nsec = 0; 679 inode->i_ctime.tv_nsec = 0; 680 inode->i_blocks = fs32_to_cpu(sb, ufs_inode->ui_blocks); 681 inode->i_generation = fs32_to_cpu(sb, ufs_inode->ui_gen); 682 ufsi->i_flags = fs32_to_cpu(sb, ufs_inode->ui_flags); 683 ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow); 684 ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag); 685 686 687 if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) { 688 memcpy(ufsi->i_u1.i_data, &ufs_inode->ui_u2.ui_addr, 689 sizeof(ufs_inode->ui_u2.ui_addr)); 690 } else { 691 memcpy(ufsi->i_u1.i_symlink, ufs_inode->ui_u2.ui_symlink, 692 sizeof(ufs_inode->ui_u2.ui_symlink) - 1); 693 ufsi->i_u1.i_symlink[sizeof(ufs_inode->ui_u2.ui_symlink) - 1] = 0; 694 } 695 return 0; 696 } 697 698 static int ufs2_read_inode(struct inode *inode, struct ufs2_inode *ufs2_inode) 699 { 700 struct ufs_inode_info *ufsi = UFS_I(inode); 701 struct super_block *sb = inode->i_sb; 702 umode_t mode; 703 704 UFSD("Reading ufs2 inode, ino %lu\n", inode->i_ino); 705 /* 706 * Copy data to the in-core inode. 707 */ 708 inode->i_mode = mode = fs16_to_cpu(sb, ufs2_inode->ui_mode); 709 set_nlink(inode, fs16_to_cpu(sb, ufs2_inode->ui_nlink)); 710 if (inode->i_nlink == 0) { 711 ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino); 712 return -1; 713 } 714 715 /* 716 * Linux now has 32-bit uid and gid, so we can support EFT. 717 */ 718 i_uid_write(inode, fs32_to_cpu(sb, ufs2_inode->ui_uid)); 719 i_gid_write(inode, fs32_to_cpu(sb, ufs2_inode->ui_gid)); 720 721 inode->i_size = fs64_to_cpu(sb, ufs2_inode->ui_size); 722 inode->i_atime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_atime); 723 inode->i_ctime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_ctime); 724 inode->i_mtime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_mtime); 725 inode->i_atime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_atimensec); 726 inode->i_ctime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_ctimensec); 727 inode->i_mtime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_mtimensec); 728 inode->i_blocks = fs64_to_cpu(sb, ufs2_inode->ui_blocks); 729 inode->i_generation = fs32_to_cpu(sb, ufs2_inode->ui_gen); 730 ufsi->i_flags = fs32_to_cpu(sb, ufs2_inode->ui_flags); 731 /* 732 ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow); 733 ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag); 734 */ 735 736 if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) { 737 memcpy(ufsi->i_u1.u2_i_data, &ufs2_inode->ui_u2.ui_addr, 738 sizeof(ufs2_inode->ui_u2.ui_addr)); 739 } else { 740 memcpy(ufsi->i_u1.i_symlink, ufs2_inode->ui_u2.ui_symlink, 741 sizeof(ufs2_inode->ui_u2.ui_symlink) - 1); 742 ufsi->i_u1.i_symlink[sizeof(ufs2_inode->ui_u2.ui_symlink) - 1] = 0; 743 } 744 return 0; 745 } 746 747 struct inode *ufs_iget(struct super_block *sb, unsigned long ino) 748 { 749 struct ufs_inode_info *ufsi; 750 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 751 struct buffer_head * bh; 752 struct inode *inode; 753 int err; 754 755 UFSD("ENTER, ino %lu\n", ino); 756 757 if (ino < UFS_ROOTINO || ino > (uspi->s_ncg * uspi->s_ipg)) { 758 ufs_warning(sb, "ufs_read_inode", "bad inode number (%lu)\n", 759 ino); 760 return ERR_PTR(-EIO); 761 } 762 763 inode = iget_locked(sb, ino); 764 if (!inode) 765 return ERR_PTR(-ENOMEM); 766 if (!(inode->i_state & I_NEW)) 767 return inode; 768 769 ufsi = UFS_I(inode); 770 771 bh = sb_bread(sb, uspi->s_sbbase + ufs_inotofsba(inode->i_ino)); 772 if (!bh) { 773 ufs_warning(sb, "ufs_read_inode", "unable to read inode %lu\n", 774 inode->i_ino); 775 goto bad_inode; 776 } 777 if ((UFS_SB(sb)->s_flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { 778 struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data; 779 780 err = ufs2_read_inode(inode, 781 ufs2_inode + ufs_inotofsbo(inode->i_ino)); 782 } else { 783 struct ufs_inode *ufs_inode = (struct ufs_inode *)bh->b_data; 784 785 err = ufs1_read_inode(inode, 786 ufs_inode + ufs_inotofsbo(inode->i_ino)); 787 } 788 789 if (err) 790 goto bad_inode; 791 inode->i_version++; 792 ufsi->i_lastfrag = 793 (inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift; 794 ufsi->i_dir_start_lookup = 0; 795 ufsi->i_osync = 0; 796 797 ufs_set_inode_ops(inode); 798 799 brelse(bh); 800 801 UFSD("EXIT\n"); 802 unlock_new_inode(inode); 803 return inode; 804 805 bad_inode: 806 iget_failed(inode); 807 return ERR_PTR(-EIO); 808 } 809 810 static void ufs1_update_inode(struct inode *inode, struct ufs_inode *ufs_inode) 811 { 812 struct super_block *sb = inode->i_sb; 813 struct ufs_inode_info *ufsi = UFS_I(inode); 814 815 ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode); 816 ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink); 817 818 ufs_set_inode_uid(sb, ufs_inode, i_uid_read(inode)); 819 ufs_set_inode_gid(sb, ufs_inode, i_gid_read(inode)); 820 821 ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size); 822 ufs_inode->ui_atime.tv_sec = cpu_to_fs32(sb, inode->i_atime.tv_sec); 823 ufs_inode->ui_atime.tv_usec = 0; 824 ufs_inode->ui_ctime.tv_sec = cpu_to_fs32(sb, inode->i_ctime.tv_sec); 825 ufs_inode->ui_ctime.tv_usec = 0; 826 ufs_inode->ui_mtime.tv_sec = cpu_to_fs32(sb, inode->i_mtime.tv_sec); 827 ufs_inode->ui_mtime.tv_usec = 0; 828 ufs_inode->ui_blocks = cpu_to_fs32(sb, inode->i_blocks); 829 ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags); 830 ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation); 831 832 if ((UFS_SB(sb)->s_flags & UFS_UID_MASK) == UFS_UID_EFT) { 833 ufs_inode->ui_u3.ui_sun.ui_shadow = cpu_to_fs32(sb, ufsi->i_shadow); 834 ufs_inode->ui_u3.ui_sun.ui_oeftflag = cpu_to_fs32(sb, ufsi->i_oeftflag); 835 } 836 837 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { 838 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */ 839 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.i_data[0]; 840 } else if (inode->i_blocks) { 841 memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.i_data, 842 sizeof(ufs_inode->ui_u2.ui_addr)); 843 } 844 else { 845 memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink, 846 sizeof(ufs_inode->ui_u2.ui_symlink)); 847 } 848 849 if (!inode->i_nlink) 850 memset (ufs_inode, 0, sizeof(struct ufs_inode)); 851 } 852 853 static void ufs2_update_inode(struct inode *inode, struct ufs2_inode *ufs_inode) 854 { 855 struct super_block *sb = inode->i_sb; 856 struct ufs_inode_info *ufsi = UFS_I(inode); 857 858 UFSD("ENTER\n"); 859 ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode); 860 ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink); 861 862 ufs_inode->ui_uid = cpu_to_fs32(sb, i_uid_read(inode)); 863 ufs_inode->ui_gid = cpu_to_fs32(sb, i_gid_read(inode)); 864 865 ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size); 866 ufs_inode->ui_atime = cpu_to_fs64(sb, inode->i_atime.tv_sec); 867 ufs_inode->ui_atimensec = cpu_to_fs32(sb, inode->i_atime.tv_nsec); 868 ufs_inode->ui_ctime = cpu_to_fs64(sb, inode->i_ctime.tv_sec); 869 ufs_inode->ui_ctimensec = cpu_to_fs32(sb, inode->i_ctime.tv_nsec); 870 ufs_inode->ui_mtime = cpu_to_fs64(sb, inode->i_mtime.tv_sec); 871 ufs_inode->ui_mtimensec = cpu_to_fs32(sb, inode->i_mtime.tv_nsec); 872 873 ufs_inode->ui_blocks = cpu_to_fs64(sb, inode->i_blocks); 874 ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags); 875 ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation); 876 877 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { 878 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */ 879 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.u2_i_data[0]; 880 } else if (inode->i_blocks) { 881 memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.u2_i_data, 882 sizeof(ufs_inode->ui_u2.ui_addr)); 883 } else { 884 memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink, 885 sizeof(ufs_inode->ui_u2.ui_symlink)); 886 } 887 888 if (!inode->i_nlink) 889 memset (ufs_inode, 0, sizeof(struct ufs2_inode)); 890 UFSD("EXIT\n"); 891 } 892 893 static int ufs_update_inode(struct inode * inode, int do_sync) 894 { 895 struct super_block *sb = inode->i_sb; 896 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 897 struct buffer_head * bh; 898 899 UFSD("ENTER, ino %lu\n", inode->i_ino); 900 901 if (inode->i_ino < UFS_ROOTINO || 902 inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) { 903 ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino); 904 return -1; 905 } 906 907 bh = sb_bread(sb, ufs_inotofsba(inode->i_ino)); 908 if (!bh) { 909 ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino); 910 return -1; 911 } 912 if (uspi->fs_magic == UFS2_MAGIC) { 913 struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data; 914 915 ufs2_update_inode(inode, 916 ufs2_inode + ufs_inotofsbo(inode->i_ino)); 917 } else { 918 struct ufs_inode *ufs_inode = (struct ufs_inode *) bh->b_data; 919 920 ufs1_update_inode(inode, ufs_inode + ufs_inotofsbo(inode->i_ino)); 921 } 922 923 mark_buffer_dirty(bh); 924 if (do_sync) 925 sync_dirty_buffer(bh); 926 brelse (bh); 927 928 UFSD("EXIT\n"); 929 return 0; 930 } 931 932 int ufs_write_inode(struct inode *inode, struct writeback_control *wbc) 933 { 934 return ufs_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL); 935 } 936 937 int ufs_sync_inode (struct inode *inode) 938 { 939 return ufs_update_inode (inode, 1); 940 } 941 942 void ufs_evict_inode(struct inode * inode) 943 { 944 int want_delete = 0; 945 946 if (!inode->i_nlink && !is_bad_inode(inode)) 947 want_delete = 1; 948 949 truncate_inode_pages_final(&inode->i_data); 950 if (want_delete) { 951 inode->i_size = 0; 952 if (inode->i_blocks) 953 ufs_truncate_blocks(inode); 954 } 955 956 invalidate_inode_buffers(inode); 957 clear_inode(inode); 958 959 if (want_delete) 960 ufs_free_inode(inode); 961 } 962 963 #define DIRECT_BLOCK ((inode->i_size + uspi->s_bsize - 1) >> uspi->s_bshift) 964 #define DIRECT_FRAGMENT ((inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift) 965 966 static void ufs_trunc_direct(struct inode *inode) 967 { 968 struct ufs_inode_info *ufsi = UFS_I(inode); 969 struct super_block * sb; 970 struct ufs_sb_private_info * uspi; 971 void *p; 972 u64 frag1, frag2, frag3, frag4, block1, block2; 973 unsigned frag_to_free, free_count; 974 unsigned i, tmp; 975 976 UFSD("ENTER: ino %lu\n", inode->i_ino); 977 978 sb = inode->i_sb; 979 uspi = UFS_SB(sb)->s_uspi; 980 981 frag_to_free = 0; 982 free_count = 0; 983 984 frag1 = DIRECT_FRAGMENT; 985 frag4 = min_t(u64, UFS_NDIR_FRAGMENT, ufsi->i_lastfrag); 986 frag2 = ((frag1 & uspi->s_fpbmask) ? ((frag1 | uspi->s_fpbmask) + 1) : frag1); 987 frag3 = frag4 & ~uspi->s_fpbmask; 988 block1 = block2 = 0; 989 if (frag2 > frag3) { 990 frag2 = frag4; 991 frag3 = frag4 = 0; 992 } else if (frag2 < frag3) { 993 block1 = ufs_fragstoblks (frag2); 994 block2 = ufs_fragstoblks (frag3); 995 } 996 997 UFSD("ino %lu, frag1 %llu, frag2 %llu, block1 %llu, block2 %llu," 998 " frag3 %llu, frag4 %llu\n", inode->i_ino, 999 (unsigned long long)frag1, (unsigned long long)frag2, 1000 (unsigned long long)block1, (unsigned long long)block2, 1001 (unsigned long long)frag3, (unsigned long long)frag4); 1002 1003 if (frag1 >= frag2) 1004 goto next1; 1005 1006 /* 1007 * Free first free fragments 1008 */ 1009 p = ufs_get_direct_data_ptr(uspi, ufsi, ufs_fragstoblks(frag1)); 1010 tmp = ufs_data_ptr_to_cpu(sb, p); 1011 if (!tmp ) 1012 ufs_panic (sb, "ufs_trunc_direct", "internal error"); 1013 frag2 -= frag1; 1014 frag1 = ufs_fragnum (frag1); 1015 1016 ufs_free_fragments(inode, tmp + frag1, frag2); 1017 mark_inode_dirty(inode); 1018 frag_to_free = tmp + frag1; 1019 1020 next1: 1021 /* 1022 * Free whole blocks 1023 */ 1024 for (i = block1 ; i < block2; i++) { 1025 p = ufs_get_direct_data_ptr(uspi, ufsi, i); 1026 tmp = ufs_data_ptr_to_cpu(sb, p); 1027 if (!tmp) 1028 continue; 1029 write_seqlock(&ufsi->meta_lock); 1030 ufs_data_ptr_clear(uspi, p); 1031 write_sequnlock(&ufsi->meta_lock); 1032 1033 if (free_count == 0) { 1034 frag_to_free = tmp; 1035 free_count = uspi->s_fpb; 1036 } else if (free_count > 0 && frag_to_free == tmp - free_count) 1037 free_count += uspi->s_fpb; 1038 else { 1039 ufs_free_blocks (inode, frag_to_free, free_count); 1040 frag_to_free = tmp; 1041 free_count = uspi->s_fpb; 1042 } 1043 mark_inode_dirty(inode); 1044 } 1045 1046 if (free_count > 0) 1047 ufs_free_blocks (inode, frag_to_free, free_count); 1048 1049 if (frag3 >= frag4) 1050 goto next3; 1051 1052 /* 1053 * Free last free fragments 1054 */ 1055 p = ufs_get_direct_data_ptr(uspi, ufsi, ufs_fragstoblks(frag3)); 1056 tmp = ufs_data_ptr_to_cpu(sb, p); 1057 if (!tmp ) 1058 ufs_panic(sb, "ufs_truncate_direct", "internal error"); 1059 frag4 = ufs_fragnum (frag4); 1060 write_seqlock(&ufsi->meta_lock); 1061 ufs_data_ptr_clear(uspi, p); 1062 write_sequnlock(&ufsi->meta_lock); 1063 1064 ufs_free_fragments (inode, tmp, frag4); 1065 mark_inode_dirty(inode); 1066 next3: 1067 1068 UFSD("EXIT: ino %lu\n", inode->i_ino); 1069 } 1070 1071 1072 static void ufs_trunc_indirect(struct inode *inode, unsigned from, void *p) 1073 { 1074 struct super_block *sb = inode->i_sb; 1075 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 1076 struct ufs_buffer_head * ind_ubh; 1077 void *ind; 1078 u64 tmp, frag_to_free = 0; 1079 unsigned free_count = 0; 1080 bool to_free = !from; 1081 unsigned i; 1082 1083 tmp = ufs_data_ptr_to_cpu(sb, p); 1084 if (!tmp) 1085 return; 1086 ind_ubh = ubh_bread(sb, tmp, uspi->s_bsize); 1087 if (!ind_ubh) { 1088 write_seqlock(&UFS_I(inode)->meta_lock); 1089 ufs_data_ptr_clear(uspi, p); 1090 write_sequnlock(&UFS_I(inode)->meta_lock); 1091 return; 1092 } 1093 1094 for (i = from; i < uspi->s_apb; i++) { 1095 ind = ubh_get_data_ptr(uspi, ind_ubh, i); 1096 tmp = ufs_data_ptr_to_cpu(sb, ind); 1097 if (!tmp) 1098 continue; 1099 1100 write_seqlock(&UFS_I(inode)->meta_lock); 1101 ufs_data_ptr_clear(uspi, ind); 1102 write_sequnlock(&UFS_I(inode)->meta_lock); 1103 ubh_mark_buffer_dirty(ind_ubh); 1104 if (free_count == 0) { 1105 frag_to_free = tmp; 1106 free_count = uspi->s_fpb; 1107 } else if (free_count > 0 && frag_to_free == tmp - free_count) 1108 free_count += uspi->s_fpb; 1109 else { 1110 ufs_free_blocks (inode, frag_to_free, free_count); 1111 frag_to_free = tmp; 1112 free_count = uspi->s_fpb; 1113 } 1114 1115 mark_inode_dirty(inode); 1116 } 1117 1118 if (free_count > 0) { 1119 ufs_free_blocks (inode, frag_to_free, free_count); 1120 } 1121 if (to_free) { 1122 tmp = ufs_data_ptr_to_cpu(sb, p); 1123 write_seqlock(&UFS_I(inode)->meta_lock); 1124 ufs_data_ptr_clear(uspi, p); 1125 write_sequnlock(&UFS_I(inode)->meta_lock); 1126 1127 ubh_bforget(ind_ubh); 1128 ufs_free_blocks (inode, tmp, uspi->s_fpb); 1129 mark_inode_dirty(inode); 1130 return; 1131 } 1132 if (IS_SYNC(inode) && ubh_buffer_dirty(ind_ubh)) 1133 ubh_sync_block(ind_ubh); 1134 ubh_brelse (ind_ubh); 1135 } 1136 1137 static void ufs_trunc_dindirect(struct inode *inode, u64 offset, void *p) 1138 { 1139 struct super_block *sb = inode->i_sb; 1140 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 1141 struct ufs_buffer_head *dind_bh; 1142 u64 tmp; 1143 void *dind; 1144 bool free_it = !offset; 1145 unsigned dindirect_block = offset >> uspi->s_apbshift; 1146 unsigned from = offset & uspi->s_apbmask; 1147 unsigned i; 1148 1149 tmp = ufs_data_ptr_to_cpu(sb, p); 1150 if (!tmp) 1151 return; 1152 dind_bh = ubh_bread(sb, tmp, uspi->s_bsize); 1153 if (!dind_bh) { 1154 write_seqlock(&UFS_I(inode)->meta_lock); 1155 ufs_data_ptr_clear(uspi, p); 1156 write_sequnlock(&UFS_I(inode)->meta_lock); 1157 return; 1158 } 1159 1160 for (i = dindirect_block ; i < uspi->s_apb ; i++, from = 0) { 1161 dind = ubh_get_data_ptr(uspi, dind_bh, i); 1162 tmp = ufs_data_ptr_to_cpu(sb, dind); 1163 if (!tmp) 1164 continue; 1165 ufs_trunc_indirect(inode, from, dind); 1166 ubh_mark_buffer_dirty(dind_bh); 1167 } 1168 1169 if (free_it) { 1170 tmp = ufs_data_ptr_to_cpu(sb, p); 1171 write_seqlock(&UFS_I(inode)->meta_lock); 1172 ufs_data_ptr_clear(uspi, p); 1173 write_sequnlock(&UFS_I(inode)->meta_lock); 1174 1175 ubh_bforget(dind_bh); 1176 ufs_free_blocks(inode, tmp, uspi->s_fpb); 1177 mark_inode_dirty(inode); 1178 return; 1179 } 1180 if (IS_SYNC(inode) && ubh_buffer_dirty(dind_bh)) 1181 ubh_sync_block(dind_bh); 1182 ubh_brelse (dind_bh); 1183 } 1184 1185 static void ufs_trunc_tindirect(struct inode *inode, u64 offset) 1186 { 1187 struct super_block *sb = inode->i_sb; 1188 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 1189 struct ufs_inode_info *ufsi = UFS_I(inode); 1190 struct ufs_buffer_head * tind_bh; 1191 u64 tmp; 1192 void *tind, *p; 1193 bool free_it = !offset; 1194 unsigned tindirect_block = offset >> uspi->s_2apbshift; 1195 unsigned i; 1196 1197 offset -= tindirect_block << uspi->s_2apbshift; 1198 1199 p = ufs_get_direct_data_ptr(uspi, ufsi, UFS_TIND_BLOCK); 1200 if (!(tmp = ufs_data_ptr_to_cpu(sb, p))) 1201 return; 1202 tind_bh = ubh_bread (sb, tmp, uspi->s_bsize); 1203 if (!tind_bh) { 1204 write_seqlock(&ufsi->meta_lock); 1205 ufs_data_ptr_clear(uspi, p); 1206 write_sequnlock(&ufsi->meta_lock); 1207 return; 1208 } 1209 1210 for (i = tindirect_block ; i < uspi->s_apb ; i++, offset = 0) { 1211 tind = ubh_get_data_ptr(uspi, tind_bh, i); 1212 ufs_trunc_dindirect(inode, offset, tind); 1213 ubh_mark_buffer_dirty(tind_bh); 1214 } 1215 if (free_it) { 1216 tmp = ufs_data_ptr_to_cpu(sb, p); 1217 write_seqlock(&ufsi->meta_lock); 1218 ufs_data_ptr_clear(uspi, p); 1219 write_sequnlock(&ufsi->meta_lock); 1220 1221 ubh_bforget(tind_bh); 1222 ufs_free_blocks(inode, tmp, uspi->s_fpb); 1223 mark_inode_dirty(inode); 1224 return; 1225 } 1226 if (IS_SYNC(inode) && ubh_buffer_dirty(tind_bh)) 1227 ubh_sync_block(tind_bh); 1228 ubh_brelse (tind_bh); 1229 } 1230 1231 static int ufs_alloc_lastblock(struct inode *inode, loff_t size) 1232 { 1233 int err = 0; 1234 struct super_block *sb = inode->i_sb; 1235 struct address_space *mapping = inode->i_mapping; 1236 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 1237 unsigned i, end; 1238 sector_t lastfrag; 1239 struct page *lastpage; 1240 struct buffer_head *bh; 1241 u64 phys64; 1242 1243 lastfrag = (size + uspi->s_fsize - 1) >> uspi->s_fshift; 1244 1245 if (!lastfrag) 1246 goto out; 1247 1248 lastfrag--; 1249 1250 lastpage = ufs_get_locked_page(mapping, lastfrag >> 1251 (PAGE_CACHE_SHIFT - inode->i_blkbits)); 1252 if (IS_ERR(lastpage)) { 1253 err = -EIO; 1254 goto out; 1255 } 1256 1257 end = lastfrag & ((1 << (PAGE_CACHE_SHIFT - inode->i_blkbits)) - 1); 1258 bh = page_buffers(lastpage); 1259 for (i = 0; i < end; ++i) 1260 bh = bh->b_this_page; 1261 1262 1263 err = ufs_getfrag_block(inode, lastfrag, bh, 1); 1264 1265 if (unlikely(err)) 1266 goto out_unlock; 1267 1268 if (buffer_new(bh)) { 1269 clear_buffer_new(bh); 1270 unmap_underlying_metadata(bh->b_bdev, 1271 bh->b_blocknr); 1272 /* 1273 * we do not zeroize fragment, because of 1274 * if it maped to hole, it already contains zeroes 1275 */ 1276 set_buffer_uptodate(bh); 1277 mark_buffer_dirty(bh); 1278 set_page_dirty(lastpage); 1279 } 1280 1281 if (lastfrag >= UFS_IND_FRAGMENT) { 1282 end = uspi->s_fpb - ufs_fragnum(lastfrag) - 1; 1283 phys64 = bh->b_blocknr + 1; 1284 for (i = 0; i < end; ++i) { 1285 bh = sb_getblk(sb, i + phys64); 1286 lock_buffer(bh); 1287 memset(bh->b_data, 0, sb->s_blocksize); 1288 set_buffer_uptodate(bh); 1289 mark_buffer_dirty(bh); 1290 unlock_buffer(bh); 1291 sync_dirty_buffer(bh); 1292 brelse(bh); 1293 } 1294 } 1295 out_unlock: 1296 ufs_put_locked_page(lastpage); 1297 out: 1298 return err; 1299 } 1300 1301 static void __ufs_truncate_blocks(struct inode *inode) 1302 { 1303 struct ufs_inode_info *ufsi = UFS_I(inode); 1304 struct super_block *sb = inode->i_sb; 1305 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 1306 unsigned offsets[4]; 1307 int depth = ufs_block_to_path(inode, DIRECT_BLOCK, offsets); 1308 1309 mutex_lock(&ufsi->truncate_mutex); 1310 switch (depth) { 1311 case 1: 1312 ufs_trunc_direct(inode); 1313 ufs_trunc_indirect(inode, 0, 1314 ufs_get_direct_data_ptr(uspi, ufsi, UFS_IND_BLOCK)); 1315 ufs_trunc_dindirect(inode, 0, 1316 ufs_get_direct_data_ptr(uspi, ufsi, UFS_DIND_BLOCK)); 1317 ufs_trunc_tindirect(inode, 0); 1318 break; 1319 case 2: 1320 ufs_trunc_indirect(inode, offsets[1], 1321 ufs_get_direct_data_ptr(uspi, ufsi, UFS_IND_BLOCK)); 1322 ufs_trunc_dindirect(inode, 0, 1323 ufs_get_direct_data_ptr(uspi, ufsi, UFS_DIND_BLOCK)); 1324 ufs_trunc_tindirect(inode, 0); 1325 break; 1326 case 3: 1327 ufs_trunc_dindirect(inode, DIRECT_BLOCK - UFS_IND_BLOCK - uspi->s_apb, 1328 ufs_get_direct_data_ptr(uspi, ufsi, UFS_DIND_BLOCK)); 1329 ufs_trunc_tindirect(inode, 0); 1330 break; 1331 case 4: 1332 ufs_trunc_tindirect(inode, DIRECT_BLOCK - UFS_NDADDR - uspi->s_apb - uspi->s_2apb); 1333 } 1334 ufsi->i_lastfrag = DIRECT_FRAGMENT; 1335 mutex_unlock(&ufsi->truncate_mutex); 1336 } 1337 1338 static int ufs_truncate(struct inode *inode, loff_t size) 1339 { 1340 int err = 0; 1341 1342 UFSD("ENTER: ino %lu, i_size: %llu, old_i_size: %llu\n", 1343 inode->i_ino, (unsigned long long)size, 1344 (unsigned long long)i_size_read(inode)); 1345 1346 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || 1347 S_ISLNK(inode->i_mode))) 1348 return -EINVAL; 1349 if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) 1350 return -EPERM; 1351 1352 err = ufs_alloc_lastblock(inode, size); 1353 1354 if (err) 1355 goto out; 1356 1357 block_truncate_page(inode->i_mapping, size, ufs_getfrag_block); 1358 1359 truncate_setsize(inode, size); 1360 1361 __ufs_truncate_blocks(inode); 1362 inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC; 1363 mark_inode_dirty(inode); 1364 out: 1365 UFSD("EXIT: err %d\n", err); 1366 return err; 1367 } 1368 1369 void ufs_truncate_blocks(struct inode *inode) 1370 { 1371 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || 1372 S_ISLNK(inode->i_mode))) 1373 return; 1374 if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) 1375 return; 1376 __ufs_truncate_blocks(inode); 1377 } 1378 1379 int ufs_setattr(struct dentry *dentry, struct iattr *attr) 1380 { 1381 struct inode *inode = d_inode(dentry); 1382 unsigned int ia_valid = attr->ia_valid; 1383 int error; 1384 1385 error = inode_change_ok(inode, attr); 1386 if (error) 1387 return error; 1388 1389 if (ia_valid & ATTR_SIZE && attr->ia_size != inode->i_size) { 1390 error = ufs_truncate(inode, attr->ia_size); 1391 if (error) 1392 return error; 1393 } 1394 1395 setattr_copy(inode, attr); 1396 mark_inode_dirty(inode); 1397 return 0; 1398 } 1399 1400 const struct inode_operations ufs_file_inode_operations = { 1401 .setattr = ufs_setattr, 1402 }; 1403