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 struct buffer_head * result; 230 unsigned blockoff, lastblockoff; 231 u64 tmp, goal, lastfrag, block, lastblock; 232 void *p, *p2; 233 234 UFSD("ENTER, ino %lu, fragment %llu, new_fragment %llu, required %u, " 235 "metadata %d\n", inode->i_ino, (unsigned long long)fragment, 236 (unsigned long long)new_fragment, required, !phys); 237 238 /* TODO : to be done for write support 239 if ( (flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) 240 goto ufs2; 241 */ 242 243 block = ufs_fragstoblks (fragment); 244 blockoff = ufs_fragnum (fragment); 245 p = ufs_get_direct_data_ptr(uspi, ufsi, block); 246 247 goal = 0; 248 249 tmp = ufs_data_ptr_to_cpu(sb, p); 250 251 lastfrag = ufsi->i_lastfrag; 252 if (tmp && fragment < lastfrag) { 253 if (!phys) { 254 return sb_getblk(sb, uspi->s_sbbase + tmp + blockoff); 255 } else { 256 *phys = uspi->s_sbbase + tmp + blockoff; 257 return NULL; 258 } 259 } 260 261 lastblock = ufs_fragstoblks (lastfrag); 262 lastblockoff = ufs_fragnum (lastfrag); 263 /* 264 * We will extend file into new block beyond last allocated block 265 */ 266 if (lastblock < block) { 267 /* 268 * We must reallocate last allocated block 269 */ 270 if (lastblockoff) { 271 p2 = ufs_get_direct_data_ptr(uspi, ufsi, lastblock); 272 tmp = ufs_new_fragments(inode, p2, lastfrag, 273 ufs_data_ptr_to_cpu(sb, p2), 274 uspi->s_fpb - lastblockoff, 275 err, locked_page); 276 if (!tmp) 277 return NULL; 278 lastfrag = ufsi->i_lastfrag; 279 } 280 tmp = ufs_data_ptr_to_cpu(sb, 281 ufs_get_direct_data_ptr(uspi, ufsi, 282 lastblock)); 283 if (tmp) 284 goal = tmp + uspi->s_fpb; 285 tmp = ufs_new_fragments (inode, p, fragment - blockoff, 286 goal, required + blockoff, 287 err, 288 phys != NULL ? locked_page : NULL); 289 } else if (lastblock == block) { 290 /* 291 * We will extend last allocated block 292 */ 293 tmp = ufs_new_fragments(inode, p, fragment - 294 (blockoff - lastblockoff), 295 ufs_data_ptr_to_cpu(sb, p), 296 required + (blockoff - lastblockoff), 297 err, phys != NULL ? locked_page : NULL); 298 } else /* (lastblock > block) */ { 299 /* 300 * We will allocate new block before last allocated block 301 */ 302 if (block) { 303 tmp = ufs_data_ptr_to_cpu(sb, 304 ufs_get_direct_data_ptr(uspi, ufsi, block - 1)); 305 if (tmp) 306 goal = tmp + uspi->s_fpb; 307 } 308 tmp = ufs_new_fragments(inode, p, fragment - blockoff, 309 goal, uspi->s_fpb, err, 310 phys != NULL ? locked_page : NULL); 311 } 312 if (!tmp) { 313 *err = -ENOSPC; 314 return NULL; 315 } 316 317 if (!phys) { 318 result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff); 319 } else { 320 *phys = uspi->s_sbbase + tmp + blockoff; 321 result = NULL; 322 *err = 0; 323 *new = 1; 324 } 325 326 inode->i_ctime = CURRENT_TIME_SEC; 327 if (IS_SYNC(inode)) 328 ufs_sync_inode (inode); 329 mark_inode_dirty(inode); 330 return result; 331 332 /* This part : To be implemented .... 333 Required only for writing, not required for READ-ONLY. 334 ufs2: 335 336 u2_block = ufs_fragstoblks(fragment); 337 u2_blockoff = ufs_fragnum(fragment); 338 p = ufsi->i_u1.u2_i_data + block; 339 goal = 0; 340 341 repeat2: 342 tmp = fs32_to_cpu(sb, *p); 343 lastfrag = ufsi->i_lastfrag; 344 345 */ 346 } 347 348 /** 349 * ufs_inode_getblock() - allocate new block 350 * @inode: pointer to inode 351 * @bh: pointer to block which hold "pointer" to new allocated block 352 * @fragment: number of `fragment' which hold pointer 353 * to new allocated block 354 * @new_fragment: number of new allocated fragment 355 * (block will hold this fragment and also uspi->s_fpb-1) 356 * @err: see ufs_inode_getfrag() 357 * @phys: see ufs_inode_getfrag() 358 * @new: see ufs_inode_getfrag() 359 * @locked_page: see ufs_inode_getfrag() 360 */ 361 static struct buffer_head * 362 ufs_inode_getblock(struct inode *inode, struct buffer_head *bh, 363 u64 fragment, sector_t new_fragment, int *err, 364 long *phys, int *new, struct page *locked_page) 365 { 366 struct super_block *sb = inode->i_sb; 367 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 368 struct buffer_head * result; 369 unsigned blockoff; 370 u64 tmp, goal, block; 371 void *p; 372 373 block = ufs_fragstoblks (fragment); 374 blockoff = ufs_fragnum (fragment); 375 376 UFSD("ENTER, ino %lu, fragment %llu, new_fragment %llu, metadata %d\n", 377 inode->i_ino, (unsigned long long)fragment, 378 (unsigned long long)new_fragment, !phys); 379 380 result = NULL; 381 if (!bh) 382 goto out; 383 if (!buffer_uptodate(bh)) { 384 ll_rw_block (READ, 1, &bh); 385 wait_on_buffer (bh); 386 if (!buffer_uptodate(bh)) 387 goto out; 388 } 389 if (uspi->fs_magic == UFS2_MAGIC) 390 p = (__fs64 *)bh->b_data + block; 391 else 392 p = (__fs32 *)bh->b_data + block; 393 394 tmp = ufs_data_ptr_to_cpu(sb, p); 395 if (tmp) { 396 if (!phys) 397 result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff); 398 else 399 *phys = uspi->s_sbbase + tmp + blockoff; 400 goto out; 401 } 402 403 if (block && (uspi->fs_magic == UFS2_MAGIC ? 404 (tmp = fs64_to_cpu(sb, ((__fs64 *)bh->b_data)[block-1])) : 405 (tmp = fs32_to_cpu(sb, ((__fs32 *)bh->b_data)[block-1])))) 406 goal = tmp + uspi->s_fpb; 407 else 408 goal = bh->b_blocknr + uspi->s_fpb; 409 tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment), goal, 410 uspi->s_fpb, err, locked_page); 411 if (!tmp) 412 goto out; 413 414 if (!phys) { 415 result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff); 416 } else { 417 *phys = uspi->s_sbbase + tmp + blockoff; 418 *new = 1; 419 } 420 421 mark_buffer_dirty(bh); 422 if (IS_SYNC(inode)) 423 sync_dirty_buffer(bh); 424 inode->i_ctime = CURRENT_TIME_SEC; 425 mark_inode_dirty(inode); 426 out: 427 brelse (bh); 428 UFSD("EXIT\n"); 429 return result; 430 } 431 432 /** 433 * ufs_getfrag_block() - `get_block_t' function, interface between UFS and 434 * readpage, writepage and so on 435 */ 436 437 static int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create) 438 { 439 struct super_block * sb = inode->i_sb; 440 struct ufs_sb_info * sbi = UFS_SB(sb); 441 struct ufs_sb_private_info * uspi = sbi->s_uspi; 442 struct buffer_head * bh; 443 int ret, err, new; 444 unsigned offsets[4]; 445 int depth = ufs_block_to_path(inode, fragment >> uspi->s_fpbshift, offsets); 446 unsigned long ptr,phys; 447 u64 phys64 = 0; 448 449 if (!create) { 450 phys64 = ufs_frag_map(inode, offsets, depth); 451 if (phys64) { 452 phys64 += fragment & uspi->s_fpbmask; 453 map_bh(bh_result, sb, phys64); 454 } 455 return 0; 456 } 457 458 /* This code entered only while writing ....? */ 459 460 err = -EIO; 461 new = 0; 462 ret = 0; 463 bh = NULL; 464 465 mutex_lock(&UFS_I(inode)->truncate_mutex); 466 467 UFSD("ENTER, ino %lu, fragment %llu\n", inode->i_ino, (unsigned long long)fragment); 468 if (fragment > 469 ((UFS_NDADDR + uspi->s_apb + uspi->s_2apb + uspi->s_3apb) 470 << uspi->s_fpbshift)) 471 goto abort_too_big; 472 473 err = 0; 474 ptr = fragment; 475 476 /* 477 * ok, these macros clean the logic up a bit and make 478 * it much more readable: 479 */ 480 #define GET_INODE_DATABLOCK(x) \ 481 ufs_inode_getfrag(inode, x, fragment, 1, &err, &phys, &new,\ 482 bh_result->b_page) 483 #define GET_INODE_PTR(x) \ 484 ufs_inode_getfrag(inode, x, fragment, uspi->s_fpb, &err, NULL, NULL,\ 485 bh_result->b_page) 486 #define GET_INDIRECT_DATABLOCK(x) \ 487 ufs_inode_getblock(inode, bh, x, fragment, \ 488 &err, &phys, &new, bh_result->b_page) 489 #define GET_INDIRECT_PTR(x) \ 490 ufs_inode_getblock(inode, bh, x, fragment, \ 491 &err, NULL, NULL, NULL) 492 493 if (ptr < UFS_NDIR_FRAGMENT) { 494 bh = GET_INODE_DATABLOCK(ptr); 495 goto out; 496 } 497 ptr -= UFS_NDIR_FRAGMENT; 498 if (ptr < (1 << (uspi->s_apbshift + uspi->s_fpbshift))) { 499 bh = GET_INODE_PTR(UFS_IND_FRAGMENT + (ptr >> uspi->s_apbshift)); 500 goto get_indirect; 501 } 502 ptr -= 1 << (uspi->s_apbshift + uspi->s_fpbshift); 503 if (ptr < (1 << (uspi->s_2apbshift + uspi->s_fpbshift))) { 504 bh = GET_INODE_PTR(UFS_DIND_FRAGMENT + (ptr >> uspi->s_2apbshift)); 505 goto get_double; 506 } 507 ptr -= 1 << (uspi->s_2apbshift + uspi->s_fpbshift); 508 bh = GET_INODE_PTR(UFS_TIND_FRAGMENT + (ptr >> uspi->s_3apbshift)); 509 bh = GET_INDIRECT_PTR((ptr >> uspi->s_2apbshift) & uspi->s_apbmask); 510 get_double: 511 bh = GET_INDIRECT_PTR((ptr >> uspi->s_apbshift) & uspi->s_apbmask); 512 get_indirect: 513 bh = GET_INDIRECT_DATABLOCK(ptr & uspi->s_apbmask); 514 515 #undef GET_INODE_DATABLOCK 516 #undef GET_INODE_PTR 517 #undef GET_INDIRECT_DATABLOCK 518 #undef GET_INDIRECT_PTR 519 520 out: 521 if (err) 522 goto abort; 523 if (new) 524 set_buffer_new(bh_result); 525 map_bh(bh_result, sb, phys); 526 abort: 527 mutex_unlock(&UFS_I(inode)->truncate_mutex); 528 529 return err; 530 531 abort_too_big: 532 ufs_warning(sb, "ufs_get_block", "block > big"); 533 goto abort; 534 } 535 536 static int ufs_writepage(struct page *page, struct writeback_control *wbc) 537 { 538 return block_write_full_page(page,ufs_getfrag_block,wbc); 539 } 540 541 static int ufs_readpage(struct file *file, struct page *page) 542 { 543 return block_read_full_page(page,ufs_getfrag_block); 544 } 545 546 int ufs_prepare_chunk(struct page *page, loff_t pos, unsigned len) 547 { 548 return __block_write_begin(page, pos, len, ufs_getfrag_block); 549 } 550 551 static void ufs_truncate_blocks(struct inode *); 552 553 static void ufs_write_failed(struct address_space *mapping, loff_t to) 554 { 555 struct inode *inode = mapping->host; 556 557 if (to > inode->i_size) { 558 truncate_pagecache(inode, inode->i_size); 559 ufs_truncate_blocks(inode); 560 } 561 } 562 563 static int ufs_write_begin(struct file *file, struct address_space *mapping, 564 loff_t pos, unsigned len, unsigned flags, 565 struct page **pagep, void **fsdata) 566 { 567 int ret; 568 569 ret = block_write_begin(mapping, pos, len, flags, pagep, 570 ufs_getfrag_block); 571 if (unlikely(ret)) 572 ufs_write_failed(mapping, pos + len); 573 574 return ret; 575 } 576 577 static int ufs_write_end(struct file *file, struct address_space *mapping, 578 loff_t pos, unsigned len, unsigned copied, 579 struct page *page, void *fsdata) 580 { 581 int ret; 582 583 ret = generic_write_end(file, mapping, pos, len, copied, page, fsdata); 584 if (ret < len) 585 ufs_write_failed(mapping, pos + len); 586 return ret; 587 } 588 589 static sector_t ufs_bmap(struct address_space *mapping, sector_t block) 590 { 591 return generic_block_bmap(mapping,block,ufs_getfrag_block); 592 } 593 594 const struct address_space_operations ufs_aops = { 595 .readpage = ufs_readpage, 596 .writepage = ufs_writepage, 597 .write_begin = ufs_write_begin, 598 .write_end = ufs_write_end, 599 .bmap = ufs_bmap 600 }; 601 602 static void ufs_set_inode_ops(struct inode *inode) 603 { 604 if (S_ISREG(inode->i_mode)) { 605 inode->i_op = &ufs_file_inode_operations; 606 inode->i_fop = &ufs_file_operations; 607 inode->i_mapping->a_ops = &ufs_aops; 608 } else if (S_ISDIR(inode->i_mode)) { 609 inode->i_op = &ufs_dir_inode_operations; 610 inode->i_fop = &ufs_dir_operations; 611 inode->i_mapping->a_ops = &ufs_aops; 612 } else if (S_ISLNK(inode->i_mode)) { 613 if (!inode->i_blocks) { 614 inode->i_op = &ufs_fast_symlink_inode_operations; 615 inode->i_link = (char *)UFS_I(inode)->i_u1.i_symlink; 616 } else { 617 inode->i_op = &ufs_symlink_inode_operations; 618 inode->i_mapping->a_ops = &ufs_aops; 619 } 620 } else 621 init_special_inode(inode, inode->i_mode, 622 ufs_get_inode_dev(inode->i_sb, UFS_I(inode))); 623 } 624 625 static int ufs1_read_inode(struct inode *inode, struct ufs_inode *ufs_inode) 626 { 627 struct ufs_inode_info *ufsi = UFS_I(inode); 628 struct super_block *sb = inode->i_sb; 629 umode_t mode; 630 631 /* 632 * Copy data to the in-core inode. 633 */ 634 inode->i_mode = mode = fs16_to_cpu(sb, ufs_inode->ui_mode); 635 set_nlink(inode, fs16_to_cpu(sb, ufs_inode->ui_nlink)); 636 if (inode->i_nlink == 0) { 637 ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino); 638 return -1; 639 } 640 641 /* 642 * Linux now has 32-bit uid and gid, so we can support EFT. 643 */ 644 i_uid_write(inode, ufs_get_inode_uid(sb, ufs_inode)); 645 i_gid_write(inode, ufs_get_inode_gid(sb, ufs_inode)); 646 647 inode->i_size = fs64_to_cpu(sb, ufs_inode->ui_size); 648 inode->i_atime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_atime.tv_sec); 649 inode->i_ctime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_ctime.tv_sec); 650 inode->i_mtime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_mtime.tv_sec); 651 inode->i_mtime.tv_nsec = 0; 652 inode->i_atime.tv_nsec = 0; 653 inode->i_ctime.tv_nsec = 0; 654 inode->i_blocks = fs32_to_cpu(sb, ufs_inode->ui_blocks); 655 inode->i_generation = fs32_to_cpu(sb, ufs_inode->ui_gen); 656 ufsi->i_flags = fs32_to_cpu(sb, ufs_inode->ui_flags); 657 ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow); 658 ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag); 659 660 661 if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) { 662 memcpy(ufsi->i_u1.i_data, &ufs_inode->ui_u2.ui_addr, 663 sizeof(ufs_inode->ui_u2.ui_addr)); 664 } else { 665 memcpy(ufsi->i_u1.i_symlink, ufs_inode->ui_u2.ui_symlink, 666 sizeof(ufs_inode->ui_u2.ui_symlink) - 1); 667 ufsi->i_u1.i_symlink[sizeof(ufs_inode->ui_u2.ui_symlink) - 1] = 0; 668 } 669 return 0; 670 } 671 672 static int ufs2_read_inode(struct inode *inode, struct ufs2_inode *ufs2_inode) 673 { 674 struct ufs_inode_info *ufsi = UFS_I(inode); 675 struct super_block *sb = inode->i_sb; 676 umode_t mode; 677 678 UFSD("Reading ufs2 inode, ino %lu\n", inode->i_ino); 679 /* 680 * Copy data to the in-core inode. 681 */ 682 inode->i_mode = mode = fs16_to_cpu(sb, ufs2_inode->ui_mode); 683 set_nlink(inode, fs16_to_cpu(sb, ufs2_inode->ui_nlink)); 684 if (inode->i_nlink == 0) { 685 ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino); 686 return -1; 687 } 688 689 /* 690 * Linux now has 32-bit uid and gid, so we can support EFT. 691 */ 692 i_uid_write(inode, fs32_to_cpu(sb, ufs2_inode->ui_uid)); 693 i_gid_write(inode, fs32_to_cpu(sb, ufs2_inode->ui_gid)); 694 695 inode->i_size = fs64_to_cpu(sb, ufs2_inode->ui_size); 696 inode->i_atime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_atime); 697 inode->i_ctime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_ctime); 698 inode->i_mtime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_mtime); 699 inode->i_atime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_atimensec); 700 inode->i_ctime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_ctimensec); 701 inode->i_mtime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_mtimensec); 702 inode->i_blocks = fs64_to_cpu(sb, ufs2_inode->ui_blocks); 703 inode->i_generation = fs32_to_cpu(sb, ufs2_inode->ui_gen); 704 ufsi->i_flags = fs32_to_cpu(sb, ufs2_inode->ui_flags); 705 /* 706 ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow); 707 ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag); 708 */ 709 710 if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) { 711 memcpy(ufsi->i_u1.u2_i_data, &ufs2_inode->ui_u2.ui_addr, 712 sizeof(ufs2_inode->ui_u2.ui_addr)); 713 } else { 714 memcpy(ufsi->i_u1.i_symlink, ufs2_inode->ui_u2.ui_symlink, 715 sizeof(ufs2_inode->ui_u2.ui_symlink) - 1); 716 ufsi->i_u1.i_symlink[sizeof(ufs2_inode->ui_u2.ui_symlink) - 1] = 0; 717 } 718 return 0; 719 } 720 721 struct inode *ufs_iget(struct super_block *sb, unsigned long ino) 722 { 723 struct ufs_inode_info *ufsi; 724 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 725 struct buffer_head * bh; 726 struct inode *inode; 727 int err; 728 729 UFSD("ENTER, ino %lu\n", ino); 730 731 if (ino < UFS_ROOTINO || ino > (uspi->s_ncg * uspi->s_ipg)) { 732 ufs_warning(sb, "ufs_read_inode", "bad inode number (%lu)\n", 733 ino); 734 return ERR_PTR(-EIO); 735 } 736 737 inode = iget_locked(sb, ino); 738 if (!inode) 739 return ERR_PTR(-ENOMEM); 740 if (!(inode->i_state & I_NEW)) 741 return inode; 742 743 ufsi = UFS_I(inode); 744 745 bh = sb_bread(sb, uspi->s_sbbase + ufs_inotofsba(inode->i_ino)); 746 if (!bh) { 747 ufs_warning(sb, "ufs_read_inode", "unable to read inode %lu\n", 748 inode->i_ino); 749 goto bad_inode; 750 } 751 if ((UFS_SB(sb)->s_flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { 752 struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data; 753 754 err = ufs2_read_inode(inode, 755 ufs2_inode + ufs_inotofsbo(inode->i_ino)); 756 } else { 757 struct ufs_inode *ufs_inode = (struct ufs_inode *)bh->b_data; 758 759 err = ufs1_read_inode(inode, 760 ufs_inode + ufs_inotofsbo(inode->i_ino)); 761 } 762 763 if (err) 764 goto bad_inode; 765 inode->i_version++; 766 ufsi->i_lastfrag = 767 (inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift; 768 ufsi->i_dir_start_lookup = 0; 769 ufsi->i_osync = 0; 770 771 ufs_set_inode_ops(inode); 772 773 brelse(bh); 774 775 UFSD("EXIT\n"); 776 unlock_new_inode(inode); 777 return inode; 778 779 bad_inode: 780 iget_failed(inode); 781 return ERR_PTR(-EIO); 782 } 783 784 static void ufs1_update_inode(struct inode *inode, struct ufs_inode *ufs_inode) 785 { 786 struct super_block *sb = inode->i_sb; 787 struct ufs_inode_info *ufsi = UFS_I(inode); 788 789 ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode); 790 ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink); 791 792 ufs_set_inode_uid(sb, ufs_inode, i_uid_read(inode)); 793 ufs_set_inode_gid(sb, ufs_inode, i_gid_read(inode)); 794 795 ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size); 796 ufs_inode->ui_atime.tv_sec = cpu_to_fs32(sb, inode->i_atime.tv_sec); 797 ufs_inode->ui_atime.tv_usec = 0; 798 ufs_inode->ui_ctime.tv_sec = cpu_to_fs32(sb, inode->i_ctime.tv_sec); 799 ufs_inode->ui_ctime.tv_usec = 0; 800 ufs_inode->ui_mtime.tv_sec = cpu_to_fs32(sb, inode->i_mtime.tv_sec); 801 ufs_inode->ui_mtime.tv_usec = 0; 802 ufs_inode->ui_blocks = cpu_to_fs32(sb, inode->i_blocks); 803 ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags); 804 ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation); 805 806 if ((UFS_SB(sb)->s_flags & UFS_UID_MASK) == UFS_UID_EFT) { 807 ufs_inode->ui_u3.ui_sun.ui_shadow = cpu_to_fs32(sb, ufsi->i_shadow); 808 ufs_inode->ui_u3.ui_sun.ui_oeftflag = cpu_to_fs32(sb, ufsi->i_oeftflag); 809 } 810 811 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { 812 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */ 813 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.i_data[0]; 814 } else if (inode->i_blocks) { 815 memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.i_data, 816 sizeof(ufs_inode->ui_u2.ui_addr)); 817 } 818 else { 819 memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink, 820 sizeof(ufs_inode->ui_u2.ui_symlink)); 821 } 822 823 if (!inode->i_nlink) 824 memset (ufs_inode, 0, sizeof(struct ufs_inode)); 825 } 826 827 static void ufs2_update_inode(struct inode *inode, struct ufs2_inode *ufs_inode) 828 { 829 struct super_block *sb = inode->i_sb; 830 struct ufs_inode_info *ufsi = UFS_I(inode); 831 832 UFSD("ENTER\n"); 833 ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode); 834 ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink); 835 836 ufs_inode->ui_uid = cpu_to_fs32(sb, i_uid_read(inode)); 837 ufs_inode->ui_gid = cpu_to_fs32(sb, i_gid_read(inode)); 838 839 ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size); 840 ufs_inode->ui_atime = cpu_to_fs64(sb, inode->i_atime.tv_sec); 841 ufs_inode->ui_atimensec = cpu_to_fs32(sb, inode->i_atime.tv_nsec); 842 ufs_inode->ui_ctime = cpu_to_fs64(sb, inode->i_ctime.tv_sec); 843 ufs_inode->ui_ctimensec = cpu_to_fs32(sb, inode->i_ctime.tv_nsec); 844 ufs_inode->ui_mtime = cpu_to_fs64(sb, inode->i_mtime.tv_sec); 845 ufs_inode->ui_mtimensec = cpu_to_fs32(sb, inode->i_mtime.tv_nsec); 846 847 ufs_inode->ui_blocks = cpu_to_fs64(sb, inode->i_blocks); 848 ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags); 849 ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation); 850 851 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { 852 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */ 853 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.u2_i_data[0]; 854 } else if (inode->i_blocks) { 855 memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.u2_i_data, 856 sizeof(ufs_inode->ui_u2.ui_addr)); 857 } else { 858 memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink, 859 sizeof(ufs_inode->ui_u2.ui_symlink)); 860 } 861 862 if (!inode->i_nlink) 863 memset (ufs_inode, 0, sizeof(struct ufs2_inode)); 864 UFSD("EXIT\n"); 865 } 866 867 static int ufs_update_inode(struct inode * inode, int do_sync) 868 { 869 struct super_block *sb = inode->i_sb; 870 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 871 struct buffer_head * bh; 872 873 UFSD("ENTER, ino %lu\n", inode->i_ino); 874 875 if (inode->i_ino < UFS_ROOTINO || 876 inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) { 877 ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino); 878 return -1; 879 } 880 881 bh = sb_bread(sb, ufs_inotofsba(inode->i_ino)); 882 if (!bh) { 883 ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino); 884 return -1; 885 } 886 if (uspi->fs_magic == UFS2_MAGIC) { 887 struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data; 888 889 ufs2_update_inode(inode, 890 ufs2_inode + ufs_inotofsbo(inode->i_ino)); 891 } else { 892 struct ufs_inode *ufs_inode = (struct ufs_inode *) bh->b_data; 893 894 ufs1_update_inode(inode, ufs_inode + ufs_inotofsbo(inode->i_ino)); 895 } 896 897 mark_buffer_dirty(bh); 898 if (do_sync) 899 sync_dirty_buffer(bh); 900 brelse (bh); 901 902 UFSD("EXIT\n"); 903 return 0; 904 } 905 906 int ufs_write_inode(struct inode *inode, struct writeback_control *wbc) 907 { 908 return ufs_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL); 909 } 910 911 int ufs_sync_inode (struct inode *inode) 912 { 913 return ufs_update_inode (inode, 1); 914 } 915 916 void ufs_evict_inode(struct inode * inode) 917 { 918 int want_delete = 0; 919 920 if (!inode->i_nlink && !is_bad_inode(inode)) 921 want_delete = 1; 922 923 truncate_inode_pages_final(&inode->i_data); 924 if (want_delete) { 925 inode->i_size = 0; 926 if (inode->i_blocks) 927 ufs_truncate_blocks(inode); 928 } 929 930 invalidate_inode_buffers(inode); 931 clear_inode(inode); 932 933 if (want_delete) 934 ufs_free_inode(inode); 935 } 936 937 struct to_free { 938 struct inode *inode; 939 u64 to; 940 unsigned count; 941 }; 942 943 static inline void free_data(struct to_free *ctx, u64 from, unsigned count) 944 { 945 if (ctx->count && ctx->to != from) { 946 ufs_free_blocks(ctx->inode, ctx->to - ctx->count, ctx->count); 947 ctx->count = 0; 948 } 949 ctx->count += count; 950 ctx->to = from + count; 951 } 952 953 #define DIRECT_BLOCK ((inode->i_size + uspi->s_bsize - 1) >> uspi->s_bshift) 954 #define DIRECT_FRAGMENT ((inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift) 955 956 static void ufs_trunc_direct(struct inode *inode) 957 { 958 struct ufs_inode_info *ufsi = UFS_I(inode); 959 struct super_block * sb; 960 struct ufs_sb_private_info * uspi; 961 void *p; 962 u64 frag1, frag2, frag3, frag4, block1, block2; 963 struct to_free ctx = {.inode = inode}; 964 unsigned i, tmp; 965 966 UFSD("ENTER: ino %lu\n", inode->i_ino); 967 968 sb = inode->i_sb; 969 uspi = UFS_SB(sb)->s_uspi; 970 971 frag1 = DIRECT_FRAGMENT; 972 frag4 = min_t(u64, UFS_NDIR_FRAGMENT, ufsi->i_lastfrag); 973 frag2 = ((frag1 & uspi->s_fpbmask) ? ((frag1 | uspi->s_fpbmask) + 1) : frag1); 974 frag3 = frag4 & ~uspi->s_fpbmask; 975 block1 = block2 = 0; 976 if (frag2 > frag3) { 977 frag2 = frag4; 978 frag3 = frag4 = 0; 979 } else if (frag2 < frag3) { 980 block1 = ufs_fragstoblks (frag2); 981 block2 = ufs_fragstoblks (frag3); 982 } 983 984 UFSD("ino %lu, frag1 %llu, frag2 %llu, block1 %llu, block2 %llu," 985 " frag3 %llu, frag4 %llu\n", inode->i_ino, 986 (unsigned long long)frag1, (unsigned long long)frag2, 987 (unsigned long long)block1, (unsigned long long)block2, 988 (unsigned long long)frag3, (unsigned long long)frag4); 989 990 if (frag1 >= frag2) 991 goto next1; 992 993 /* 994 * Free first free fragments 995 */ 996 p = ufs_get_direct_data_ptr(uspi, ufsi, ufs_fragstoblks(frag1)); 997 tmp = ufs_data_ptr_to_cpu(sb, p); 998 if (!tmp ) 999 ufs_panic (sb, "ufs_trunc_direct", "internal error"); 1000 frag2 -= frag1; 1001 frag1 = ufs_fragnum (frag1); 1002 1003 ufs_free_fragments(inode, tmp + frag1, frag2); 1004 1005 next1: 1006 /* 1007 * Free whole blocks 1008 */ 1009 for (i = block1 ; i < block2; i++) { 1010 p = ufs_get_direct_data_ptr(uspi, ufsi, i); 1011 tmp = ufs_data_ptr_to_cpu(sb, p); 1012 if (!tmp) 1013 continue; 1014 write_seqlock(&ufsi->meta_lock); 1015 ufs_data_ptr_clear(uspi, p); 1016 write_sequnlock(&ufsi->meta_lock); 1017 1018 free_data(&ctx, tmp, uspi->s_fpb); 1019 } 1020 1021 free_data(&ctx, 0, 0); 1022 1023 if (frag3 >= frag4) 1024 goto next3; 1025 1026 /* 1027 * Free last free fragments 1028 */ 1029 p = ufs_get_direct_data_ptr(uspi, ufsi, ufs_fragstoblks(frag3)); 1030 tmp = ufs_data_ptr_to_cpu(sb, p); 1031 if (!tmp ) 1032 ufs_panic(sb, "ufs_truncate_direct", "internal error"); 1033 frag4 = ufs_fragnum (frag4); 1034 write_seqlock(&ufsi->meta_lock); 1035 ufs_data_ptr_clear(uspi, p); 1036 write_sequnlock(&ufsi->meta_lock); 1037 1038 ufs_free_fragments (inode, tmp, frag4); 1039 next3: 1040 1041 UFSD("EXIT: ino %lu\n", inode->i_ino); 1042 } 1043 1044 static void free_full_branch(struct inode *inode, u64 ind_block, int depth) 1045 { 1046 struct super_block *sb = inode->i_sb; 1047 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 1048 struct ufs_buffer_head *ubh = ubh_bread(sb, ind_block, uspi->s_bsize); 1049 unsigned i; 1050 1051 if (!ubh) 1052 return; 1053 1054 if (--depth) { 1055 for (i = 0; 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 free_full_branch(inode, block, depth); 1060 } 1061 } else { 1062 struct to_free ctx = {.inode = inode}; 1063 1064 for (i = 0; i < uspi->s_apb; i++) { 1065 void *p = ubh_get_data_ptr(uspi, ubh, i); 1066 u64 block = ufs_data_ptr_to_cpu(sb, p); 1067 if (block) 1068 free_data(&ctx, block, uspi->s_fpb); 1069 } 1070 free_data(&ctx, 0, 0); 1071 } 1072 1073 ubh_bforget(ubh); 1074 ufs_free_blocks(inode, ind_block, uspi->s_fpb); 1075 } 1076 1077 static void free_branch_tail(struct inode *inode, unsigned from, struct ufs_buffer_head *ubh, int depth) 1078 { 1079 struct super_block *sb = inode->i_sb; 1080 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 1081 unsigned i; 1082 1083 if (--depth) { 1084 for (i = from; i < uspi->s_apb ; i++) { 1085 void *p = ubh_get_data_ptr(uspi, ubh, i); 1086 u64 block = ufs_data_ptr_to_cpu(sb, p); 1087 if (block) { 1088 write_seqlock(&UFS_I(inode)->meta_lock); 1089 ufs_data_ptr_clear(uspi, p); 1090 write_sequnlock(&UFS_I(inode)->meta_lock); 1091 ubh_mark_buffer_dirty(ubh); 1092 free_full_branch(inode, block, depth); 1093 } 1094 } 1095 } else { 1096 struct to_free ctx = {.inode = inode}; 1097 1098 for (i = from; i < uspi->s_apb; i++) { 1099 void *p = ubh_get_data_ptr(uspi, ubh, i); 1100 u64 block = ufs_data_ptr_to_cpu(sb, p); 1101 if (block) { 1102 write_seqlock(&UFS_I(inode)->meta_lock); 1103 ufs_data_ptr_clear(uspi, p); 1104 write_sequnlock(&UFS_I(inode)->meta_lock); 1105 ubh_mark_buffer_dirty(ubh); 1106 free_data(&ctx, block, uspi->s_fpb); 1107 } 1108 } 1109 free_data(&ctx, 0, 0); 1110 } 1111 if (IS_SYNC(inode) && ubh_buffer_dirty(ubh)) 1112 ubh_sync_block(ubh); 1113 ubh_brelse(ubh); 1114 } 1115 1116 static int ufs_alloc_lastblock(struct inode *inode, loff_t size) 1117 { 1118 int err = 0; 1119 struct super_block *sb = inode->i_sb; 1120 struct address_space *mapping = inode->i_mapping; 1121 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 1122 unsigned i, end; 1123 sector_t lastfrag; 1124 struct page *lastpage; 1125 struct buffer_head *bh; 1126 u64 phys64; 1127 1128 lastfrag = (size + uspi->s_fsize - 1) >> uspi->s_fshift; 1129 1130 if (!lastfrag) 1131 goto out; 1132 1133 lastfrag--; 1134 1135 lastpage = ufs_get_locked_page(mapping, lastfrag >> 1136 (PAGE_CACHE_SHIFT - inode->i_blkbits)); 1137 if (IS_ERR(lastpage)) { 1138 err = -EIO; 1139 goto out; 1140 } 1141 1142 end = lastfrag & ((1 << (PAGE_CACHE_SHIFT - inode->i_blkbits)) - 1); 1143 bh = page_buffers(lastpage); 1144 for (i = 0; i < end; ++i) 1145 bh = bh->b_this_page; 1146 1147 1148 err = ufs_getfrag_block(inode, lastfrag, bh, 1); 1149 1150 if (unlikely(err)) 1151 goto out_unlock; 1152 1153 if (buffer_new(bh)) { 1154 clear_buffer_new(bh); 1155 unmap_underlying_metadata(bh->b_bdev, 1156 bh->b_blocknr); 1157 /* 1158 * we do not zeroize fragment, because of 1159 * if it maped to hole, it already contains zeroes 1160 */ 1161 set_buffer_uptodate(bh); 1162 mark_buffer_dirty(bh); 1163 set_page_dirty(lastpage); 1164 } 1165 1166 if (lastfrag >= UFS_IND_FRAGMENT) { 1167 end = uspi->s_fpb - ufs_fragnum(lastfrag) - 1; 1168 phys64 = bh->b_blocknr + 1; 1169 for (i = 0; i < end; ++i) { 1170 bh = sb_getblk(sb, i + phys64); 1171 lock_buffer(bh); 1172 memset(bh->b_data, 0, sb->s_blocksize); 1173 set_buffer_uptodate(bh); 1174 mark_buffer_dirty(bh); 1175 unlock_buffer(bh); 1176 sync_dirty_buffer(bh); 1177 brelse(bh); 1178 } 1179 } 1180 out_unlock: 1181 ufs_put_locked_page(lastpage); 1182 out: 1183 return err; 1184 } 1185 1186 static void __ufs_truncate_blocks(struct inode *inode) 1187 { 1188 struct ufs_inode_info *ufsi = UFS_I(inode); 1189 struct super_block *sb = inode->i_sb; 1190 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 1191 unsigned offsets[4]; 1192 int depth = ufs_block_to_path(inode, DIRECT_BLOCK, offsets); 1193 int depth2; 1194 unsigned i; 1195 struct ufs_buffer_head *ubh[3]; 1196 void *p; 1197 u64 block; 1198 1199 if (!depth) 1200 return; 1201 1202 /* find the last non-zero in offsets[] */ 1203 for (depth2 = depth - 1; depth2; depth2--) 1204 if (offsets[depth2]) 1205 break; 1206 1207 mutex_lock(&ufsi->truncate_mutex); 1208 if (depth == 1) { 1209 ufs_trunc_direct(inode); 1210 offsets[0] = UFS_IND_BLOCK; 1211 } else { 1212 /* get the blocks that should be partially emptied */ 1213 p = ufs_get_direct_data_ptr(uspi, ufsi, offsets[0]); 1214 for (i = 0; i < depth2; i++) { 1215 offsets[i]++; /* next branch is fully freed */ 1216 block = ufs_data_ptr_to_cpu(sb, p); 1217 if (!block) 1218 break; 1219 ubh[i] = ubh_bread(sb, block, uspi->s_bsize); 1220 if (!ubh[i]) { 1221 write_seqlock(&ufsi->meta_lock); 1222 ufs_data_ptr_clear(uspi, p); 1223 write_sequnlock(&ufsi->meta_lock); 1224 break; 1225 } 1226 p = ubh_get_data_ptr(uspi, ubh[i], offsets[i + 1]); 1227 } 1228 while (i--) 1229 free_branch_tail(inode, offsets[i + 1], ubh[i], depth - i - 1); 1230 } 1231 for (i = offsets[0]; i <= UFS_TIND_BLOCK; i++) { 1232 p = ufs_get_direct_data_ptr(uspi, ufsi, i); 1233 block = ufs_data_ptr_to_cpu(sb, p); 1234 if (block) { 1235 write_seqlock(&ufsi->meta_lock); 1236 ufs_data_ptr_clear(uspi, p); 1237 write_sequnlock(&ufsi->meta_lock); 1238 free_full_branch(inode, block, i - UFS_IND_BLOCK + 1); 1239 } 1240 } 1241 ufsi->i_lastfrag = DIRECT_FRAGMENT; 1242 mark_inode_dirty(inode); 1243 mutex_unlock(&ufsi->truncate_mutex); 1244 } 1245 1246 static int ufs_truncate(struct inode *inode, loff_t size) 1247 { 1248 int err = 0; 1249 1250 UFSD("ENTER: ino %lu, i_size: %llu, old_i_size: %llu\n", 1251 inode->i_ino, (unsigned long long)size, 1252 (unsigned long long)i_size_read(inode)); 1253 1254 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || 1255 S_ISLNK(inode->i_mode))) 1256 return -EINVAL; 1257 if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) 1258 return -EPERM; 1259 1260 err = ufs_alloc_lastblock(inode, size); 1261 1262 if (err) 1263 goto out; 1264 1265 block_truncate_page(inode->i_mapping, size, ufs_getfrag_block); 1266 1267 truncate_setsize(inode, size); 1268 1269 __ufs_truncate_blocks(inode); 1270 inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC; 1271 mark_inode_dirty(inode); 1272 out: 1273 UFSD("EXIT: err %d\n", err); 1274 return err; 1275 } 1276 1277 void ufs_truncate_blocks(struct inode *inode) 1278 { 1279 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || 1280 S_ISLNK(inode->i_mode))) 1281 return; 1282 if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) 1283 return; 1284 __ufs_truncate_blocks(inode); 1285 } 1286 1287 int ufs_setattr(struct dentry *dentry, struct iattr *attr) 1288 { 1289 struct inode *inode = d_inode(dentry); 1290 unsigned int ia_valid = attr->ia_valid; 1291 int error; 1292 1293 error = inode_change_ok(inode, attr); 1294 if (error) 1295 return error; 1296 1297 if (ia_valid & ATTR_SIZE && attr->ia_size != inode->i_size) { 1298 error = ufs_truncate(inode, attr->ia_size); 1299 if (error) 1300 return error; 1301 } 1302 1303 setattr_copy(inode, attr); 1304 mark_inode_dirty(inode); 1305 return 0; 1306 } 1307 1308 const struct inode_operations ufs_file_inode_operations = { 1309 .setattr = ufs_setattr, 1310 }; 1311