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