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