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, unsigned offsets[4], int depth) 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 Indirect chain[4], *q = chain; 130 unsigned *p; 131 unsigned flags = UFS_SB(sb)->s_flags; 132 u64 res = 0; 133 134 UFSD(": uspi->s_fpbshift = %d ,uspi->s_apbmask = %x, mask=%llx\n", 135 uspi->s_fpbshift, uspi->s_apbmask, 136 (unsigned long long)mask); 137 138 if (depth == 0) 139 goto no_block; 140 141 again: 142 p = offsets; 143 144 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) 145 goto ufs2; 146 147 if (!grow_chain32(ufsi, NULL, &ufsi->i_u1.i_data[*p++], chain, q)) 148 goto changed; 149 if (!q->key32) 150 goto no_block; 151 while (--depth) { 152 __fs32 *ptr; 153 struct buffer_head *bh; 154 unsigned n = *p++; 155 156 bh = sb_bread(sb, uspi->s_sbbase + 157 fs32_to_cpu(sb, q->key32) + (n>>shift)); 158 if (!bh) 159 goto no_block; 160 ptr = (__fs32 *)bh->b_data + (n & mask); 161 if (!grow_chain32(ufsi, bh, ptr, chain, ++q)) 162 goto changed; 163 if (!q->key32) 164 goto no_block; 165 } 166 res = fs32_to_cpu(sb, q->key32); 167 goto found; 168 169 ufs2: 170 if (!grow_chain64(ufsi, NULL, &ufsi->i_u1.u2_i_data[*p++], chain, q)) 171 goto changed; 172 if (!q->key64) 173 goto no_block; 174 175 while (--depth) { 176 __fs64 *ptr; 177 struct buffer_head *bh; 178 unsigned n = *p++; 179 180 bh = sb_bread(sb, uspi->s_sbbase + 181 fs64_to_cpu(sb, q->key64) + (n>>shift)); 182 if (!bh) 183 goto no_block; 184 ptr = (__fs64 *)bh->b_data + (n & mask); 185 if (!grow_chain64(ufsi, bh, ptr, chain, ++q)) 186 goto changed; 187 if (!q->key64) 188 goto no_block; 189 } 190 res = fs64_to_cpu(sb, q->key64); 191 found: 192 res += uspi->s_sbbase; 193 no_block: 194 while (q > chain) { 195 brelse(q->bh); 196 q--; 197 } 198 return res; 199 200 changed: 201 while (q > chain) { 202 brelse(q->bh); 203 q--; 204 } 205 goto again; 206 } 207 208 /** 209 * ufs_inode_getfrag() - allocate new fragment(s) 210 * @inode: pointer to inode 211 * @fragment: number of `fragment' which hold pointer 212 * to new allocated fragment(s) 213 * @new_fragment: number of new allocated fragment(s) 214 * @required: how many fragment(s) we require 215 * @err: we set it if something wrong 216 * @phys: pointer to where we save physical number of new allocated fragments, 217 * NULL if we allocate not data(indirect blocks for example). 218 * @new: we set it if we allocate new block 219 * @locked_page: for ufs_new_fragments() 220 */ 221 static u64 222 ufs_inode_getfrag(struct inode *inode, u64 fragment, 223 sector_t new_fragment, unsigned int required, int *err, 224 long *phys, int *new, struct page *locked_page) 225 { 226 struct ufs_inode_info *ufsi = UFS_I(inode); 227 struct super_block *sb = inode->i_sb; 228 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 229 unsigned blockoff, lastblockoff; 230 u64 tmp, goal, lastfrag, block, lastblock; 231 void *p, *p2; 232 233 UFSD("ENTER, ino %lu, fragment %llu, new_fragment %llu, required %u, " 234 "metadata %d\n", inode->i_ino, (unsigned long long)fragment, 235 (unsigned long long)new_fragment, required, !phys); 236 237 /* TODO : to be done for write support 238 if ( (flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) 239 goto ufs2; 240 */ 241 242 block = ufs_fragstoblks (fragment); 243 blockoff = ufs_fragnum (fragment); 244 p = ufs_get_direct_data_ptr(uspi, ufsi, block); 245 246 goal = 0; 247 248 tmp = ufs_data_ptr_to_cpu(sb, p); 249 250 lastfrag = ufsi->i_lastfrag; 251 if (tmp && fragment < lastfrag) 252 goto out; 253 254 lastblock = ufs_fragstoblks (lastfrag); 255 lastblockoff = ufs_fragnum (lastfrag); 256 /* 257 * We will extend file into new block beyond last allocated block 258 */ 259 if (lastblock < block) { 260 /* 261 * We must reallocate last allocated block 262 */ 263 if (lastblockoff) { 264 p2 = ufs_get_direct_data_ptr(uspi, ufsi, lastblock); 265 tmp = ufs_new_fragments(inode, p2, lastfrag, 266 ufs_data_ptr_to_cpu(sb, p2), 267 uspi->s_fpb - lastblockoff, 268 err, locked_page); 269 if (!tmp) 270 return 0; 271 lastfrag = ufsi->i_lastfrag; 272 } 273 tmp = ufs_data_ptr_to_cpu(sb, 274 ufs_get_direct_data_ptr(uspi, ufsi, 275 lastblock)); 276 if (tmp) 277 goal = tmp + uspi->s_fpb; 278 tmp = ufs_new_fragments (inode, p, fragment - blockoff, 279 goal, required + blockoff, 280 err, 281 phys != NULL ? locked_page : NULL); 282 } else if (lastblock == block) { 283 /* 284 * We will extend last allocated block 285 */ 286 tmp = ufs_new_fragments(inode, p, fragment - 287 (blockoff - lastblockoff), 288 ufs_data_ptr_to_cpu(sb, p), 289 required + (blockoff - lastblockoff), 290 err, phys != NULL ? locked_page : NULL); 291 } else /* (lastblock > block) */ { 292 /* 293 * We will allocate new block before last allocated block 294 */ 295 if (block) { 296 tmp = ufs_data_ptr_to_cpu(sb, 297 ufs_get_direct_data_ptr(uspi, ufsi, block - 1)); 298 if (tmp) 299 goal = tmp + uspi->s_fpb; 300 } 301 tmp = ufs_new_fragments(inode, p, fragment - blockoff, 302 goal, uspi->s_fpb, err, 303 phys != NULL ? locked_page : NULL); 304 } 305 if (!tmp) { 306 *err = -ENOSPC; 307 return 0; 308 } 309 310 if (phys) { 311 *err = 0; 312 *new = 1; 313 } 314 inode->i_ctime = CURRENT_TIME_SEC; 315 if (IS_SYNC(inode)) 316 ufs_sync_inode (inode); 317 mark_inode_dirty(inode); 318 out: 319 return tmp + uspi->s_sbbase; 320 321 /* This part : To be implemented .... 322 Required only for writing, not required for READ-ONLY. 323 ufs2: 324 325 u2_block = ufs_fragstoblks(fragment); 326 u2_blockoff = ufs_fragnum(fragment); 327 p = ufsi->i_u1.u2_i_data + block; 328 goal = 0; 329 330 repeat2: 331 tmp = fs32_to_cpu(sb, *p); 332 lastfrag = ufsi->i_lastfrag; 333 334 */ 335 } 336 337 /** 338 * ufs_inode_getblock() - allocate new block 339 * @inode: pointer to inode 340 * @bh: pointer to block which hold "pointer" to new allocated block 341 * @index: number of pointer in the indirect block 342 * @new_fragment: number of new allocated fragment 343 * (block will hold this fragment and also uspi->s_fpb-1) 344 * @err: see ufs_inode_getfrag() 345 * @phys: see ufs_inode_getfrag() 346 * @new: see ufs_inode_getfrag() 347 * @locked_page: see ufs_inode_getfrag() 348 */ 349 static u64 350 ufs_inode_getblock(struct inode *inode, struct buffer_head *bh, 351 unsigned index, sector_t new_fragment, int *err, 352 long *phys, int *new, struct page *locked_page) 353 { 354 struct super_block *sb = inode->i_sb; 355 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 356 u64 tmp = 0, goal; 357 void *p; 358 359 if (!bh) 360 goto out; 361 if (!buffer_uptodate(bh)) { 362 ll_rw_block (READ, 1, &bh); 363 wait_on_buffer (bh); 364 if (!buffer_uptodate(bh)) 365 goto out; 366 } 367 if (uspi->fs_magic == UFS2_MAGIC) 368 p = (__fs64 *)bh->b_data + index; 369 else 370 p = (__fs32 *)bh->b_data + index; 371 372 tmp = ufs_data_ptr_to_cpu(sb, p); 373 if (tmp) 374 goto out; 375 376 if (index && (uspi->fs_magic == UFS2_MAGIC ? 377 (tmp = fs64_to_cpu(sb, ((__fs64 *)bh->b_data)[index-1])) : 378 (tmp = fs32_to_cpu(sb, ((__fs32 *)bh->b_data)[index-1])))) 379 goal = tmp + uspi->s_fpb; 380 else 381 goal = bh->b_blocknr + uspi->s_fpb; 382 tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment), goal, 383 uspi->s_fpb, err, locked_page); 384 if (!tmp) 385 goto out; 386 387 if (new) 388 *new = 1; 389 390 mark_buffer_dirty(bh); 391 if (IS_SYNC(inode)) 392 sync_dirty_buffer(bh); 393 inode->i_ctime = CURRENT_TIME_SEC; 394 mark_inode_dirty(inode); 395 out: 396 brelse (bh); 397 UFSD("EXIT\n"); 398 if (tmp) 399 tmp += uspi->s_sbbase; 400 return tmp; 401 } 402 403 /** 404 * ufs_getfrag_block() - `get_block_t' function, interface between UFS and 405 * readpage, writepage and so on 406 */ 407 408 static int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create) 409 { 410 struct super_block * sb = inode->i_sb; 411 struct ufs_sb_info * sbi = UFS_SB(sb); 412 struct ufs_sb_private_info * uspi = sbi->s_uspi; 413 struct buffer_head * bh; 414 int ret, err, new; 415 unsigned offsets[4]; 416 int depth = ufs_block_to_path(inode, fragment >> uspi->s_fpbshift, offsets); 417 unsigned long ptr,phys; 418 u64 phys64 = 0; 419 unsigned frag = fragment & uspi->s_fpbmask; 420 unsigned mask = uspi->s_apbmask >> uspi->s_fpbshift; 421 422 if (!create) { 423 phys64 = ufs_frag_map(inode, offsets, depth); 424 if (phys64) { 425 phys64 += frag; 426 map_bh(bh_result, sb, phys64); 427 } 428 return 0; 429 } 430 431 /* This code entered only while writing ....? */ 432 433 err = -EIO; 434 new = 0; 435 ret = 0; 436 bh = NULL; 437 438 mutex_lock(&UFS_I(inode)->truncate_mutex); 439 440 UFSD("ENTER, ino %lu, fragment %llu\n", inode->i_ino, (unsigned long long)fragment); 441 if (!depth) 442 goto abort_too_big; 443 444 err = 0; 445 ptr = fragment; 446 447 if (depth == 1) { 448 phys64 = ufs_inode_getfrag(inode, ptr, fragment, 1, &err, &phys, 449 &new, bh_result->b_page); 450 if (phys64) { 451 phys64 += frag; 452 phys = phys64; 453 } 454 goto out; 455 } 456 ptr -= UFS_NDIR_FRAGMENT; 457 if (depth == 2) { 458 phys64 = ufs_inode_getfrag(inode, 459 UFS_IND_FRAGMENT + (ptr >> uspi->s_apbshift), 460 fragment, uspi->s_fpb, &err, NULL, NULL, 461 bh_result->b_page); 462 if (phys64) { 463 phys64 += (ptr >> uspi->s_apbshift) & uspi->s_fpbmask; 464 bh = sb_getblk(sb, phys64); 465 } else { 466 bh = NULL; 467 } 468 goto get_indirect; 469 } 470 ptr -= 1 << (uspi->s_apbshift + uspi->s_fpbshift); 471 if (depth == 3) { 472 phys64 = ufs_inode_getfrag(inode, 473 UFS_DIND_FRAGMENT + (ptr >> uspi->s_2apbshift), 474 fragment, uspi->s_fpb, &err, NULL, NULL, 475 bh_result->b_page); 476 if (phys64) { 477 phys64 += (ptr >> uspi->s_2apbshift) & uspi->s_fpbmask; 478 bh = sb_getblk(sb, phys64); 479 } else { 480 bh = NULL; 481 } 482 goto get_double; 483 } 484 ptr -= 1 << (uspi->s_2apbshift + uspi->s_fpbshift); 485 phys64 = ufs_inode_getfrag(inode, 486 UFS_TIND_FRAGMENT + (ptr >> uspi->s_3apbshift), 487 fragment, uspi->s_fpb, &err, NULL, NULL, 488 bh_result->b_page); 489 if (phys64) { 490 phys64 += (ptr >> uspi->s_3apbshift) & uspi->s_fpbmask; 491 bh = sb_getblk(sb, phys64); 492 } else { 493 bh = NULL; 494 } 495 phys64 = ufs_inode_getblock(inode, bh, 496 offsets[1] & mask, 497 fragment, &err, NULL, NULL, NULL); 498 if (phys64) { 499 phys64 += (ptr >> uspi->s_2apbshift) & uspi->s_fpbmask, 500 bh = sb_getblk(sb, phys64); 501 } else { 502 bh = NULL; 503 } 504 get_double: 505 phys64 = ufs_inode_getblock(inode, bh, 506 offsets[depth - 2] & mask, 507 fragment, &err, NULL, NULL, NULL); 508 if (phys64) { 509 phys64 += (ptr >> uspi->s_apbshift) & uspi->s_fpbmask, 510 bh = sb_getblk(sb, phys64); 511 } else { 512 bh = NULL; 513 } 514 get_indirect: 515 phys64 = ufs_inode_getblock(inode, bh, offsets[depth - 1] & mask, 516 fragment, &err, &phys, &new, bh_result->b_page); 517 if (phys64) { 518 phys64 += frag; 519 phys = phys64; 520 } 521 out: 522 if (err) 523 goto abort; 524 if (new) 525 set_buffer_new(bh_result); 526 map_bh(bh_result, sb, phys); 527 abort: 528 mutex_unlock(&UFS_I(inode)->truncate_mutex); 529 530 return err; 531 532 abort_too_big: 533 ufs_warning(sb, "ufs_get_block", "block > big"); 534 goto abort; 535 } 536 537 static int ufs_writepage(struct page *page, struct writeback_control *wbc) 538 { 539 return block_write_full_page(page,ufs_getfrag_block,wbc); 540 } 541 542 static int ufs_readpage(struct file *file, struct page *page) 543 { 544 return block_read_full_page(page,ufs_getfrag_block); 545 } 546 547 int ufs_prepare_chunk(struct page *page, loff_t pos, unsigned len) 548 { 549 return __block_write_begin(page, pos, len, ufs_getfrag_block); 550 } 551 552 static void ufs_truncate_blocks(struct inode *); 553 554 static void ufs_write_failed(struct address_space *mapping, loff_t to) 555 { 556 struct inode *inode = mapping->host; 557 558 if (to > inode->i_size) { 559 truncate_pagecache(inode, inode->i_size); 560 ufs_truncate_blocks(inode); 561 } 562 } 563 564 static int ufs_write_begin(struct file *file, struct address_space *mapping, 565 loff_t pos, unsigned len, unsigned flags, 566 struct page **pagep, void **fsdata) 567 { 568 int ret; 569 570 ret = block_write_begin(mapping, pos, len, flags, pagep, 571 ufs_getfrag_block); 572 if (unlikely(ret)) 573 ufs_write_failed(mapping, pos + len); 574 575 return ret; 576 } 577 578 static int ufs_write_end(struct file *file, struct address_space *mapping, 579 loff_t pos, unsigned len, unsigned copied, 580 struct page *page, void *fsdata) 581 { 582 int ret; 583 584 ret = generic_write_end(file, mapping, pos, len, copied, page, fsdata); 585 if (ret < len) 586 ufs_write_failed(mapping, pos + len); 587 return ret; 588 } 589 590 static sector_t ufs_bmap(struct address_space *mapping, sector_t block) 591 { 592 return generic_block_bmap(mapping,block,ufs_getfrag_block); 593 } 594 595 const struct address_space_operations ufs_aops = { 596 .readpage = ufs_readpage, 597 .writepage = ufs_writepage, 598 .write_begin = ufs_write_begin, 599 .write_end = ufs_write_end, 600 .bmap = ufs_bmap 601 }; 602 603 static void ufs_set_inode_ops(struct inode *inode) 604 { 605 if (S_ISREG(inode->i_mode)) { 606 inode->i_op = &ufs_file_inode_operations; 607 inode->i_fop = &ufs_file_operations; 608 inode->i_mapping->a_ops = &ufs_aops; 609 } else if (S_ISDIR(inode->i_mode)) { 610 inode->i_op = &ufs_dir_inode_operations; 611 inode->i_fop = &ufs_dir_operations; 612 inode->i_mapping->a_ops = &ufs_aops; 613 } else if (S_ISLNK(inode->i_mode)) { 614 if (!inode->i_blocks) { 615 inode->i_op = &ufs_fast_symlink_inode_operations; 616 inode->i_link = (char *)UFS_I(inode)->i_u1.i_symlink; 617 } else { 618 inode->i_op = &ufs_symlink_inode_operations; 619 inode->i_mapping->a_ops = &ufs_aops; 620 } 621 } else 622 init_special_inode(inode, inode->i_mode, 623 ufs_get_inode_dev(inode->i_sb, UFS_I(inode))); 624 } 625 626 static int ufs1_read_inode(struct inode *inode, struct ufs_inode *ufs_inode) 627 { 628 struct ufs_inode_info *ufsi = UFS_I(inode); 629 struct super_block *sb = inode->i_sb; 630 umode_t mode; 631 632 /* 633 * Copy data to the in-core inode. 634 */ 635 inode->i_mode = mode = fs16_to_cpu(sb, ufs_inode->ui_mode); 636 set_nlink(inode, fs16_to_cpu(sb, ufs_inode->ui_nlink)); 637 if (inode->i_nlink == 0) { 638 ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino); 639 return -1; 640 } 641 642 /* 643 * Linux now has 32-bit uid and gid, so we can support EFT. 644 */ 645 i_uid_write(inode, ufs_get_inode_uid(sb, ufs_inode)); 646 i_gid_write(inode, ufs_get_inode_gid(sb, ufs_inode)); 647 648 inode->i_size = fs64_to_cpu(sb, ufs_inode->ui_size); 649 inode->i_atime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_atime.tv_sec); 650 inode->i_ctime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_ctime.tv_sec); 651 inode->i_mtime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_mtime.tv_sec); 652 inode->i_mtime.tv_nsec = 0; 653 inode->i_atime.tv_nsec = 0; 654 inode->i_ctime.tv_nsec = 0; 655 inode->i_blocks = fs32_to_cpu(sb, ufs_inode->ui_blocks); 656 inode->i_generation = fs32_to_cpu(sb, ufs_inode->ui_gen); 657 ufsi->i_flags = fs32_to_cpu(sb, ufs_inode->ui_flags); 658 ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow); 659 ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag); 660 661 662 if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) { 663 memcpy(ufsi->i_u1.i_data, &ufs_inode->ui_u2.ui_addr, 664 sizeof(ufs_inode->ui_u2.ui_addr)); 665 } else { 666 memcpy(ufsi->i_u1.i_symlink, ufs_inode->ui_u2.ui_symlink, 667 sizeof(ufs_inode->ui_u2.ui_symlink) - 1); 668 ufsi->i_u1.i_symlink[sizeof(ufs_inode->ui_u2.ui_symlink) - 1] = 0; 669 } 670 return 0; 671 } 672 673 static int ufs2_read_inode(struct inode *inode, struct ufs2_inode *ufs2_inode) 674 { 675 struct ufs_inode_info *ufsi = UFS_I(inode); 676 struct super_block *sb = inode->i_sb; 677 umode_t mode; 678 679 UFSD("Reading ufs2 inode, ino %lu\n", inode->i_ino); 680 /* 681 * Copy data to the in-core inode. 682 */ 683 inode->i_mode = mode = fs16_to_cpu(sb, ufs2_inode->ui_mode); 684 set_nlink(inode, fs16_to_cpu(sb, ufs2_inode->ui_nlink)); 685 if (inode->i_nlink == 0) { 686 ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino); 687 return -1; 688 } 689 690 /* 691 * Linux now has 32-bit uid and gid, so we can support EFT. 692 */ 693 i_uid_write(inode, fs32_to_cpu(sb, ufs2_inode->ui_uid)); 694 i_gid_write(inode, fs32_to_cpu(sb, ufs2_inode->ui_gid)); 695 696 inode->i_size = fs64_to_cpu(sb, ufs2_inode->ui_size); 697 inode->i_atime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_atime); 698 inode->i_ctime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_ctime); 699 inode->i_mtime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_mtime); 700 inode->i_atime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_atimensec); 701 inode->i_ctime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_ctimensec); 702 inode->i_mtime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_mtimensec); 703 inode->i_blocks = fs64_to_cpu(sb, ufs2_inode->ui_blocks); 704 inode->i_generation = fs32_to_cpu(sb, ufs2_inode->ui_gen); 705 ufsi->i_flags = fs32_to_cpu(sb, ufs2_inode->ui_flags); 706 /* 707 ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow); 708 ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag); 709 */ 710 711 if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) { 712 memcpy(ufsi->i_u1.u2_i_data, &ufs2_inode->ui_u2.ui_addr, 713 sizeof(ufs2_inode->ui_u2.ui_addr)); 714 } else { 715 memcpy(ufsi->i_u1.i_symlink, ufs2_inode->ui_u2.ui_symlink, 716 sizeof(ufs2_inode->ui_u2.ui_symlink) - 1); 717 ufsi->i_u1.i_symlink[sizeof(ufs2_inode->ui_u2.ui_symlink) - 1] = 0; 718 } 719 return 0; 720 } 721 722 struct inode *ufs_iget(struct super_block *sb, unsigned long ino) 723 { 724 struct ufs_inode_info *ufsi; 725 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 726 struct buffer_head * bh; 727 struct inode *inode; 728 int err; 729 730 UFSD("ENTER, ino %lu\n", ino); 731 732 if (ino < UFS_ROOTINO || ino > (uspi->s_ncg * uspi->s_ipg)) { 733 ufs_warning(sb, "ufs_read_inode", "bad inode number (%lu)\n", 734 ino); 735 return ERR_PTR(-EIO); 736 } 737 738 inode = iget_locked(sb, ino); 739 if (!inode) 740 return ERR_PTR(-ENOMEM); 741 if (!(inode->i_state & I_NEW)) 742 return inode; 743 744 ufsi = UFS_I(inode); 745 746 bh = sb_bread(sb, uspi->s_sbbase + ufs_inotofsba(inode->i_ino)); 747 if (!bh) { 748 ufs_warning(sb, "ufs_read_inode", "unable to read inode %lu\n", 749 inode->i_ino); 750 goto bad_inode; 751 } 752 if ((UFS_SB(sb)->s_flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { 753 struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data; 754 755 err = ufs2_read_inode(inode, 756 ufs2_inode + ufs_inotofsbo(inode->i_ino)); 757 } else { 758 struct ufs_inode *ufs_inode = (struct ufs_inode *)bh->b_data; 759 760 err = ufs1_read_inode(inode, 761 ufs_inode + ufs_inotofsbo(inode->i_ino)); 762 } 763 764 if (err) 765 goto bad_inode; 766 inode->i_version++; 767 ufsi->i_lastfrag = 768 (inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift; 769 ufsi->i_dir_start_lookup = 0; 770 ufsi->i_osync = 0; 771 772 ufs_set_inode_ops(inode); 773 774 brelse(bh); 775 776 UFSD("EXIT\n"); 777 unlock_new_inode(inode); 778 return inode; 779 780 bad_inode: 781 iget_failed(inode); 782 return ERR_PTR(-EIO); 783 } 784 785 static void ufs1_update_inode(struct inode *inode, struct ufs_inode *ufs_inode) 786 { 787 struct super_block *sb = inode->i_sb; 788 struct ufs_inode_info *ufsi = UFS_I(inode); 789 790 ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode); 791 ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink); 792 793 ufs_set_inode_uid(sb, ufs_inode, i_uid_read(inode)); 794 ufs_set_inode_gid(sb, ufs_inode, i_gid_read(inode)); 795 796 ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size); 797 ufs_inode->ui_atime.tv_sec = cpu_to_fs32(sb, inode->i_atime.tv_sec); 798 ufs_inode->ui_atime.tv_usec = 0; 799 ufs_inode->ui_ctime.tv_sec = cpu_to_fs32(sb, inode->i_ctime.tv_sec); 800 ufs_inode->ui_ctime.tv_usec = 0; 801 ufs_inode->ui_mtime.tv_sec = cpu_to_fs32(sb, inode->i_mtime.tv_sec); 802 ufs_inode->ui_mtime.tv_usec = 0; 803 ufs_inode->ui_blocks = cpu_to_fs32(sb, inode->i_blocks); 804 ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags); 805 ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation); 806 807 if ((UFS_SB(sb)->s_flags & UFS_UID_MASK) == UFS_UID_EFT) { 808 ufs_inode->ui_u3.ui_sun.ui_shadow = cpu_to_fs32(sb, ufsi->i_shadow); 809 ufs_inode->ui_u3.ui_sun.ui_oeftflag = cpu_to_fs32(sb, ufsi->i_oeftflag); 810 } 811 812 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { 813 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */ 814 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.i_data[0]; 815 } else if (inode->i_blocks) { 816 memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.i_data, 817 sizeof(ufs_inode->ui_u2.ui_addr)); 818 } 819 else { 820 memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink, 821 sizeof(ufs_inode->ui_u2.ui_symlink)); 822 } 823 824 if (!inode->i_nlink) 825 memset (ufs_inode, 0, sizeof(struct ufs_inode)); 826 } 827 828 static void ufs2_update_inode(struct inode *inode, struct ufs2_inode *ufs_inode) 829 { 830 struct super_block *sb = inode->i_sb; 831 struct ufs_inode_info *ufsi = UFS_I(inode); 832 833 UFSD("ENTER\n"); 834 ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode); 835 ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink); 836 837 ufs_inode->ui_uid = cpu_to_fs32(sb, i_uid_read(inode)); 838 ufs_inode->ui_gid = cpu_to_fs32(sb, i_gid_read(inode)); 839 840 ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size); 841 ufs_inode->ui_atime = cpu_to_fs64(sb, inode->i_atime.tv_sec); 842 ufs_inode->ui_atimensec = cpu_to_fs32(sb, inode->i_atime.tv_nsec); 843 ufs_inode->ui_ctime = cpu_to_fs64(sb, inode->i_ctime.tv_sec); 844 ufs_inode->ui_ctimensec = cpu_to_fs32(sb, inode->i_ctime.tv_nsec); 845 ufs_inode->ui_mtime = cpu_to_fs64(sb, inode->i_mtime.tv_sec); 846 ufs_inode->ui_mtimensec = cpu_to_fs32(sb, inode->i_mtime.tv_nsec); 847 848 ufs_inode->ui_blocks = cpu_to_fs64(sb, inode->i_blocks); 849 ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags); 850 ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation); 851 852 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { 853 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */ 854 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.u2_i_data[0]; 855 } else if (inode->i_blocks) { 856 memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.u2_i_data, 857 sizeof(ufs_inode->ui_u2.ui_addr)); 858 } else { 859 memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink, 860 sizeof(ufs_inode->ui_u2.ui_symlink)); 861 } 862 863 if (!inode->i_nlink) 864 memset (ufs_inode, 0, sizeof(struct ufs2_inode)); 865 UFSD("EXIT\n"); 866 } 867 868 static int ufs_update_inode(struct inode * inode, int do_sync) 869 { 870 struct super_block *sb = inode->i_sb; 871 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 872 struct buffer_head * bh; 873 874 UFSD("ENTER, ino %lu\n", inode->i_ino); 875 876 if (inode->i_ino < UFS_ROOTINO || 877 inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) { 878 ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino); 879 return -1; 880 } 881 882 bh = sb_bread(sb, ufs_inotofsba(inode->i_ino)); 883 if (!bh) { 884 ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino); 885 return -1; 886 } 887 if (uspi->fs_magic == UFS2_MAGIC) { 888 struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data; 889 890 ufs2_update_inode(inode, 891 ufs2_inode + ufs_inotofsbo(inode->i_ino)); 892 } else { 893 struct ufs_inode *ufs_inode = (struct ufs_inode *) bh->b_data; 894 895 ufs1_update_inode(inode, ufs_inode + ufs_inotofsbo(inode->i_ino)); 896 } 897 898 mark_buffer_dirty(bh); 899 if (do_sync) 900 sync_dirty_buffer(bh); 901 brelse (bh); 902 903 UFSD("EXIT\n"); 904 return 0; 905 } 906 907 int ufs_write_inode(struct inode *inode, struct writeback_control *wbc) 908 { 909 return ufs_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL); 910 } 911 912 int ufs_sync_inode (struct inode *inode) 913 { 914 return ufs_update_inode (inode, 1); 915 } 916 917 void ufs_evict_inode(struct inode * inode) 918 { 919 int want_delete = 0; 920 921 if (!inode->i_nlink && !is_bad_inode(inode)) 922 want_delete = 1; 923 924 truncate_inode_pages_final(&inode->i_data); 925 if (want_delete) { 926 inode->i_size = 0; 927 if (inode->i_blocks) 928 ufs_truncate_blocks(inode); 929 } 930 931 invalidate_inode_buffers(inode); 932 clear_inode(inode); 933 934 if (want_delete) 935 ufs_free_inode(inode); 936 } 937 938 struct to_free { 939 struct inode *inode; 940 u64 to; 941 unsigned count; 942 }; 943 944 static inline void free_data(struct to_free *ctx, u64 from, unsigned count) 945 { 946 if (ctx->count && ctx->to != from) { 947 ufs_free_blocks(ctx->inode, ctx->to - ctx->count, ctx->count); 948 ctx->count = 0; 949 } 950 ctx->count += count; 951 ctx->to = from + count; 952 } 953 954 #define DIRECT_BLOCK ((inode->i_size + uspi->s_bsize - 1) >> uspi->s_bshift) 955 #define DIRECT_FRAGMENT ((inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift) 956 957 static void ufs_trunc_direct(struct inode *inode) 958 { 959 struct ufs_inode_info *ufsi = UFS_I(inode); 960 struct super_block * sb; 961 struct ufs_sb_private_info * uspi; 962 void *p; 963 u64 frag1, frag2, frag3, frag4, block1, block2; 964 struct to_free ctx = {.inode = inode}; 965 unsigned i, tmp; 966 967 UFSD("ENTER: ino %lu\n", inode->i_ino); 968 969 sb = inode->i_sb; 970 uspi = UFS_SB(sb)->s_uspi; 971 972 frag1 = DIRECT_FRAGMENT; 973 frag4 = min_t(u64, UFS_NDIR_FRAGMENT, ufsi->i_lastfrag); 974 frag2 = ((frag1 & uspi->s_fpbmask) ? ((frag1 | uspi->s_fpbmask) + 1) : frag1); 975 frag3 = frag4 & ~uspi->s_fpbmask; 976 block1 = block2 = 0; 977 if (frag2 > frag3) { 978 frag2 = frag4; 979 frag3 = frag4 = 0; 980 } else if (frag2 < frag3) { 981 block1 = ufs_fragstoblks (frag2); 982 block2 = ufs_fragstoblks (frag3); 983 } 984 985 UFSD("ino %lu, frag1 %llu, frag2 %llu, block1 %llu, block2 %llu," 986 " frag3 %llu, frag4 %llu\n", inode->i_ino, 987 (unsigned long long)frag1, (unsigned long long)frag2, 988 (unsigned long long)block1, (unsigned long long)block2, 989 (unsigned long long)frag3, (unsigned long long)frag4); 990 991 if (frag1 >= frag2) 992 goto next1; 993 994 /* 995 * Free first free fragments 996 */ 997 p = ufs_get_direct_data_ptr(uspi, ufsi, ufs_fragstoblks(frag1)); 998 tmp = ufs_data_ptr_to_cpu(sb, p); 999 if (!tmp ) 1000 ufs_panic (sb, "ufs_trunc_direct", "internal error"); 1001 frag2 -= frag1; 1002 frag1 = ufs_fragnum (frag1); 1003 1004 ufs_free_fragments(inode, tmp + frag1, frag2); 1005 1006 next1: 1007 /* 1008 * Free whole blocks 1009 */ 1010 for (i = block1 ; i < block2; i++) { 1011 p = ufs_get_direct_data_ptr(uspi, ufsi, i); 1012 tmp = ufs_data_ptr_to_cpu(sb, p); 1013 if (!tmp) 1014 continue; 1015 write_seqlock(&ufsi->meta_lock); 1016 ufs_data_ptr_clear(uspi, p); 1017 write_sequnlock(&ufsi->meta_lock); 1018 1019 free_data(&ctx, tmp, uspi->s_fpb); 1020 } 1021 1022 free_data(&ctx, 0, 0); 1023 1024 if (frag3 >= frag4) 1025 goto next3; 1026 1027 /* 1028 * Free last free fragments 1029 */ 1030 p = ufs_get_direct_data_ptr(uspi, ufsi, ufs_fragstoblks(frag3)); 1031 tmp = ufs_data_ptr_to_cpu(sb, p); 1032 if (!tmp ) 1033 ufs_panic(sb, "ufs_truncate_direct", "internal error"); 1034 frag4 = ufs_fragnum (frag4); 1035 write_seqlock(&ufsi->meta_lock); 1036 ufs_data_ptr_clear(uspi, p); 1037 write_sequnlock(&ufsi->meta_lock); 1038 1039 ufs_free_fragments (inode, tmp, frag4); 1040 next3: 1041 1042 UFSD("EXIT: ino %lu\n", inode->i_ino); 1043 } 1044 1045 static void free_full_branch(struct inode *inode, u64 ind_block, int depth) 1046 { 1047 struct super_block *sb = inode->i_sb; 1048 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 1049 struct ufs_buffer_head *ubh = ubh_bread(sb, ind_block, uspi->s_bsize); 1050 unsigned i; 1051 1052 if (!ubh) 1053 return; 1054 1055 if (--depth) { 1056 for (i = 0; i < uspi->s_apb; i++) { 1057 void *p = ubh_get_data_ptr(uspi, ubh, i); 1058 u64 block = ufs_data_ptr_to_cpu(sb, p); 1059 if (block) 1060 free_full_branch(inode, block, depth); 1061 } 1062 } else { 1063 struct to_free ctx = {.inode = inode}; 1064 1065 for (i = 0; i < uspi->s_apb; i++) { 1066 void *p = ubh_get_data_ptr(uspi, ubh, i); 1067 u64 block = ufs_data_ptr_to_cpu(sb, p); 1068 if (block) 1069 free_data(&ctx, block, uspi->s_fpb); 1070 } 1071 free_data(&ctx, 0, 0); 1072 } 1073 1074 ubh_bforget(ubh); 1075 ufs_free_blocks(inode, ind_block, uspi->s_fpb); 1076 } 1077 1078 static void free_branch_tail(struct inode *inode, unsigned from, struct ufs_buffer_head *ubh, int depth) 1079 { 1080 struct super_block *sb = inode->i_sb; 1081 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 1082 unsigned i; 1083 1084 if (--depth) { 1085 for (i = from; i < uspi->s_apb ; i++) { 1086 void *p = ubh_get_data_ptr(uspi, ubh, i); 1087 u64 block = ufs_data_ptr_to_cpu(sb, p); 1088 if (block) { 1089 write_seqlock(&UFS_I(inode)->meta_lock); 1090 ufs_data_ptr_clear(uspi, p); 1091 write_sequnlock(&UFS_I(inode)->meta_lock); 1092 ubh_mark_buffer_dirty(ubh); 1093 free_full_branch(inode, block, depth); 1094 } 1095 } 1096 } else { 1097 struct to_free ctx = {.inode = inode}; 1098 1099 for (i = from; i < uspi->s_apb; i++) { 1100 void *p = ubh_get_data_ptr(uspi, ubh, i); 1101 u64 block = ufs_data_ptr_to_cpu(sb, p); 1102 if (block) { 1103 write_seqlock(&UFS_I(inode)->meta_lock); 1104 ufs_data_ptr_clear(uspi, p); 1105 write_sequnlock(&UFS_I(inode)->meta_lock); 1106 ubh_mark_buffer_dirty(ubh); 1107 free_data(&ctx, block, uspi->s_fpb); 1108 } 1109 } 1110 free_data(&ctx, 0, 0); 1111 } 1112 if (IS_SYNC(inode) && ubh_buffer_dirty(ubh)) 1113 ubh_sync_block(ubh); 1114 ubh_brelse(ubh); 1115 } 1116 1117 static int ufs_alloc_lastblock(struct inode *inode, loff_t size) 1118 { 1119 int err = 0; 1120 struct super_block *sb = inode->i_sb; 1121 struct address_space *mapping = inode->i_mapping; 1122 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 1123 unsigned i, end; 1124 sector_t lastfrag; 1125 struct page *lastpage; 1126 struct buffer_head *bh; 1127 u64 phys64; 1128 1129 lastfrag = (size + uspi->s_fsize - 1) >> uspi->s_fshift; 1130 1131 if (!lastfrag) 1132 goto out; 1133 1134 lastfrag--; 1135 1136 lastpage = ufs_get_locked_page(mapping, lastfrag >> 1137 (PAGE_CACHE_SHIFT - inode->i_blkbits)); 1138 if (IS_ERR(lastpage)) { 1139 err = -EIO; 1140 goto out; 1141 } 1142 1143 end = lastfrag & ((1 << (PAGE_CACHE_SHIFT - inode->i_blkbits)) - 1); 1144 bh = page_buffers(lastpage); 1145 for (i = 0; i < end; ++i) 1146 bh = bh->b_this_page; 1147 1148 1149 err = ufs_getfrag_block(inode, lastfrag, bh, 1); 1150 1151 if (unlikely(err)) 1152 goto out_unlock; 1153 1154 if (buffer_new(bh)) { 1155 clear_buffer_new(bh); 1156 unmap_underlying_metadata(bh->b_bdev, 1157 bh->b_blocknr); 1158 /* 1159 * we do not zeroize fragment, because of 1160 * if it maped to hole, it already contains zeroes 1161 */ 1162 set_buffer_uptodate(bh); 1163 mark_buffer_dirty(bh); 1164 set_page_dirty(lastpage); 1165 } 1166 1167 if (lastfrag >= UFS_IND_FRAGMENT) { 1168 end = uspi->s_fpb - ufs_fragnum(lastfrag) - 1; 1169 phys64 = bh->b_blocknr + 1; 1170 for (i = 0; i < end; ++i) { 1171 bh = sb_getblk(sb, i + phys64); 1172 lock_buffer(bh); 1173 memset(bh->b_data, 0, sb->s_blocksize); 1174 set_buffer_uptodate(bh); 1175 mark_buffer_dirty(bh); 1176 unlock_buffer(bh); 1177 sync_dirty_buffer(bh); 1178 brelse(bh); 1179 } 1180 } 1181 out_unlock: 1182 ufs_put_locked_page(lastpage); 1183 out: 1184 return err; 1185 } 1186 1187 static void __ufs_truncate_blocks(struct inode *inode) 1188 { 1189 struct ufs_inode_info *ufsi = UFS_I(inode); 1190 struct super_block *sb = inode->i_sb; 1191 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 1192 unsigned offsets[4]; 1193 int depth = ufs_block_to_path(inode, DIRECT_BLOCK, offsets); 1194 int depth2; 1195 unsigned i; 1196 struct ufs_buffer_head *ubh[3]; 1197 void *p; 1198 u64 block; 1199 1200 if (!depth) 1201 return; 1202 1203 /* find the last non-zero in offsets[] */ 1204 for (depth2 = depth - 1; depth2; depth2--) 1205 if (offsets[depth2]) 1206 break; 1207 1208 mutex_lock(&ufsi->truncate_mutex); 1209 if (depth == 1) { 1210 ufs_trunc_direct(inode); 1211 offsets[0] = UFS_IND_BLOCK; 1212 } else { 1213 /* get the blocks that should be partially emptied */ 1214 p = ufs_get_direct_data_ptr(uspi, ufsi, offsets[0]); 1215 for (i = 0; i < depth2; i++) { 1216 offsets[i]++; /* next branch is fully freed */ 1217 block = ufs_data_ptr_to_cpu(sb, p); 1218 if (!block) 1219 break; 1220 ubh[i] = ubh_bread(sb, block, uspi->s_bsize); 1221 if (!ubh[i]) { 1222 write_seqlock(&ufsi->meta_lock); 1223 ufs_data_ptr_clear(uspi, p); 1224 write_sequnlock(&ufsi->meta_lock); 1225 break; 1226 } 1227 p = ubh_get_data_ptr(uspi, ubh[i], offsets[i + 1]); 1228 } 1229 while (i--) 1230 free_branch_tail(inode, offsets[i + 1], ubh[i], depth - i - 1); 1231 } 1232 for (i = offsets[0]; i <= UFS_TIND_BLOCK; i++) { 1233 p = ufs_get_direct_data_ptr(uspi, ufsi, i); 1234 block = ufs_data_ptr_to_cpu(sb, p); 1235 if (block) { 1236 write_seqlock(&ufsi->meta_lock); 1237 ufs_data_ptr_clear(uspi, p); 1238 write_sequnlock(&ufsi->meta_lock); 1239 free_full_branch(inode, block, i - UFS_IND_BLOCK + 1); 1240 } 1241 } 1242 ufsi->i_lastfrag = DIRECT_FRAGMENT; 1243 mark_inode_dirty(inode); 1244 mutex_unlock(&ufsi->truncate_mutex); 1245 } 1246 1247 static int ufs_truncate(struct inode *inode, loff_t size) 1248 { 1249 int err = 0; 1250 1251 UFSD("ENTER: ino %lu, i_size: %llu, old_i_size: %llu\n", 1252 inode->i_ino, (unsigned long long)size, 1253 (unsigned long long)i_size_read(inode)); 1254 1255 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || 1256 S_ISLNK(inode->i_mode))) 1257 return -EINVAL; 1258 if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) 1259 return -EPERM; 1260 1261 err = ufs_alloc_lastblock(inode, size); 1262 1263 if (err) 1264 goto out; 1265 1266 block_truncate_page(inode->i_mapping, size, ufs_getfrag_block); 1267 1268 truncate_setsize(inode, size); 1269 1270 __ufs_truncate_blocks(inode); 1271 inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC; 1272 mark_inode_dirty(inode); 1273 out: 1274 UFSD("EXIT: err %d\n", err); 1275 return err; 1276 } 1277 1278 void ufs_truncate_blocks(struct inode *inode) 1279 { 1280 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || 1281 S_ISLNK(inode->i_mode))) 1282 return; 1283 if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) 1284 return; 1285 __ufs_truncate_blocks(inode); 1286 } 1287 1288 int ufs_setattr(struct dentry *dentry, struct iattr *attr) 1289 { 1290 struct inode *inode = d_inode(dentry); 1291 unsigned int ia_valid = attr->ia_valid; 1292 int error; 1293 1294 error = inode_change_ok(inode, attr); 1295 if (error) 1296 return error; 1297 1298 if (ia_valid & ATTR_SIZE && attr->ia_size != inode->i_size) { 1299 error = ufs_truncate(inode, attr->ia_size); 1300 if (error) 1301 return error; 1302 } 1303 1304 setattr_copy(inode, attr); 1305 mark_inode_dirty(inode); 1306 return 0; 1307 } 1308 1309 const struct inode_operations ufs_file_inode_operations = { 1310 .setattr = ufs_setattr, 1311 }; 1312